Scientific Publications on CBCT - February 2010

Anterior lingual mandibular bone cavity as a diagnostic challenge: two case reports.


Authors

   Voss PJ.  Metzger MC.  Schulze D.  Loeffelbein DJ.  Pautke C.  Hohlweg-Majert B.

Institution

   Department of Oral and Maxillofacial Surgery, University Hospital Freiburg, Freiburg, Germany.

Source

   Journal of Oral & Maxillofacial Surgery.  68(1):201-4, 2010 Jan.

Link

   http://ovidsp.ovid.com/ovidweb.cgi?T=JS&MODE=ovid&PAGE=fulltext&NEWS=n&D=mesz&AUTOALERT=44878594%7c1
 


 

Diagnostic accuracy of cone-beam CT in the assessment of mandibular invasion of lower gingival carcinoma: comparison with conventional panoramic radiography.


Authors

   Momin MA.  Okochi K.  Watanabe H.  Imaizumi A.  Omura K.  Amagasa T.  Okada N.  Ohbayashi N.  Kurabayashi T.

Institution

   Oral and Maxillofacial Radiology, Graduate School, Tokyo Medical and Dental University, Yushima 1-5-45, Bunkyo-ku, Tokyo 113-8549, Japan.   momin.orad@tmd.ac.jp

Source

   European Journal of Radiology.  72(1):75-81, 2009 Oct.

 

Abstract  [ show ]

 

PURPOSE: To evaluate the diagnostic accuracy of cone-beam CT in assessingmandibular invasion by lower gingival carcinoma and compare it with thatof panoramic radiography. PATIENTS AND METHODS: Fifty patients withsquamous cell carcinoma of the lower gingiva who were examined by bothpanoramic radiography and cone-beam CT before surgery were included inthis study. Five radiologists used a 6-point rating scale to independentlyevaluate cone-beam CT and panoramic images for the presence or absence ofalveolar bone and mandibular canal involvement by tumor. Using thehistopathogical findings as the gold standard, we calculated and comparedthe area under the receiver operating characteristic curve (Az value) andthe sensitivity and specificity of the two imaging modalities. RESULTS: Inevaluations of both alveolar bone and mandibular canal involvement, themean Az value for cone-beam CT (0.918 and 0.977, respectively) wassignificantly higher than that for panoramic radiography (0.793 and 0.872,respectively). The mean sensitivity for cone-beam CT (89% and 99%,respectively) was significantly higher than that for panoramic radiography(73% and 56%, respectively). There was no significant difference in themean specificity. While cone-beam CT could provide high-resolutionthree-dimensional images, the image quality around the alveolar crest wasoften hampered by severe dental artifacts and image noise, resulting indifficulties in detecting subtle alveolar invasion. CONCLUSION: Cone-beamCT was significantly superior to panoramic radiography in evaluatingmandibular invasion by lower gingival carcinoma. Its diagnostic value indetecting subtle alveolar invasion, however, may be limited by severedental artifacts and image noise.

 
Link

   http://ovidsp.ovid.com/ovidweb.cgi?T=JS&MODE=ovid&PAGE=fulltext&NEWS=n&D=mesz&AUTOALERT=44878594%7c2

 


 

Inferior alveolar canal course: a radiographic study.


 

Authors

   Liu T.  Xia B.  Gu Z.

Institution

   Department of Oral and Maxillofacial Surgery, Hospital/School of Stomatology, Zhejiang University, Zhejiang, China.

Source

   Clinical Oral Implants Research.  20(11):1212-8, 2009 Nov.

Abstract [ show ]
 

OBJECTIVES: To describe the morphology and course of the inferior alveolarcanal (IAC) as it appears in digital panoramic radiographs. MATERIALS ANDMETHODS: Three hundred and eighty-six digital rotational panoramicradiographs (OPG) were studied using the Clinview Software (6.1.3.7version, Instrumentarium). Among the 386 radiographs, 86 radiographs with5-mm steel balls were used to calculate the magnification. RESULTS: Theaverage magnification of radiographs in this study was 7.24+/-7.55%. Thecourse of IAC as seen in the panoramic radiograph may be classified intofour types: (1) linear curve, 12.75%, (2) spoon-shaped curve, 29.25%, (3)elliptic-arc curve, 48.5%, and (4) turning curve, 9.5%. On panoramicradiographs, the IAC appeared closest to the inferior border of themandible in the region of the first molar. In relation to the teeth, onpanoramic radiographs, the IAC appeared closest to the distal root tip ofthe third molar and furthest from the mesial root tip of the first molar.CONCLUSION: In the OPG, there are four types of IAC: linear, spoon shape,elliptic-arc, and turning curve. The data found in the study may be usefulfor dental implant, mandibule surgery, and dental anesthesia. Thelimitations of the panoramic radiograph in depicting the truethree-dimensional (3D) morphology of the IAC are recognized, computedtomography (CT) and cone beam (CB)3D imaging being more precise.
 

Link

   http://ovidsp.ovid.com/ovidweb.cgi?T=JS&MODE=ovid&PAGE=fulltext&NEWS=n&D=mesz&AUTOALERT=44878594%7c3

  

 

Accuracy of a newly developed integrated system for dental implant planning.


Authors

   Dreiseidler T.  Neugebauer J.  Ritter L.  Lingohr T.  Rothamel D.
   Mischkowski RA.  Zoller JE.

Institution

   Department for Craniomaxillofacial and Plastic Surgery, University of
   Cologne, Cologne, Germany. dreiseidler@gmx.de

Source

   Clinical Oral Implants Research.  20(11):1191-9, 2009 Nov.

Abstract [ show ]
 

OBJECTIVES: To evaluate the accuracy of the first integrated system for cone-beam CT (CBCT) imaging, dental implant planning and surgical template-aided implant placement. MATERIALS AND METHODS: On the basis of CBCT scans, a total of 54 implant positions were planned for 10 partially edentulous anatomical patient-equivalent models. Surgical guides were ordered from the manufacturer (SICAT). Two different types of guidance were assessed: for assessment of the SICAT system inherent accuracy vendor's titanium sleeves of 2 mm internal diameter and 5 mm length were utilized for pilot drills. The guide sleeves of the NobelGuide system were implemented for fully guided surgery and implant insertion. Deviations perpendicular to the implant axes at the crestal and apical end, as well as the angle deviations between the virtual planning data and the surgical results, were measured utilizing a follow-up CBCT investigation and referential marker-based registration. RESULTS: The SICAT system inherent mean deviation rates for the drilled pilot osteotomies were determined to be smaller than 500 mum even at the apical end. Mean angle deviations of 1.18 degrees were determined. Utilizing the NobelGuide sleeve-in-sleeve system for fully guided implant insertion in combination with the investigated template technology enabled to insert dental implants with the same accuracy. Crestal deviations, in general, were significantly lower than the apical deviations. CONCLUSION: Although hardly comparable due to different study designs and measurement strategies, the investigated SICAT system's inherent accuracy corresponds to the most favourable results for computer-aided surgery systems published so far. In combination with the NobelGuide surgical set for fully guided insertion, the same accuracy level could be maintained for implant positioning.
 

Link

   http://ovidsp.ovid.com/ovidweb.cgi?T=JS&MODE=ovid&PAGE=fulltext&NEWS=n&D=mesz&AUTOALERT=44878594%7c4

 


Accuracy of a newly developed integrated system for dental implant planning.


Authors

Dreiseidler T. Neugebauer J. Ritter L. Lingohr T. Rothamel D. Mischkowski R.A. Zoller J.E.

Source

Clinical Oral Implants Research.  20(11)(pp 1191-1199), 2009. Date of Publication: November 2009.

Abstract
[ show ]
Objectives: To evaluate the accuracy of the first integrated system forcone-beam CT (CBCT) imaging, dental implant planning and surgicaltemplate-aided implant placement. Materials and methods: On the basis ofCBCT scans, a total of 54 implant positions were planned for 10 partiallyedentulous anatomical patient-equivalent models. Surgical guides wereordered from the manufacturer (SICAT). Two different types of guidancewere assessed: for assessment of the SICAT system inherent accuracyvendor's titanium sleeves of 2 mm internal diameter and 5 mm length wereutilized for pilot drills. The guide sleeves of the NobelGuide system wereimplemented for fully guided surgery and implant insertion. Deviationsperpendicular to the implant axes at the crestal and apical end, as wellas the angle deviations between the virtual planning data and the surgicalresults, were measured utilizing a follow-up CBCT investigation andreferential marker-based registration. Results: The SICAT system inherentmean deviation rates for the drilled pilot osteotomies were determined tobe smaller than 500 mum even at the apical end. Mean angle deviations of1.18degreeswere determined. Utilizing the NobelGuide sleeve-in-sleevesystem for fully guided implant insertion in combination with theinvestigated template technology enabled to insert dental implants withthe same accuracy. Crestal deviations, in general, were significantlylower than the apical deviations. Conclusion: Although hardly comparabledue to different study designs and measurement strategies, theinvestigated SICAT system's inherent accuracy corresponds to the mostfavourable results for computer-aided surgery systems published so far. Incombination with the NobelGuide surgical set for fully guided insertion,the same accuracy level could be maintained for implant positioning.copyright 2009 John Wiley & Sons A/S.

 

http://ovidsp.ovid.com/ovidweb.cgi?T=JS&MODE=ovid&PAGE=fulltext&NEWS=n&D=embv&AUTOALERT=44878584%7c1


Detection of jaw and root fractures using cone beam computed tomography: a
case report.


Authors

Ilguy D. Ilguy M. Fisekcioglu E. Bayirli G.

Source

Dentomaxillofacial Radiology.  38(3)(pp 169-173), 2009. Date of Publication: March 2009.

Abstract
[ show ]
The aim of this case report is to demonstrate jaw and root fractures usinga combination of cone beam CT (CBCT), CT and conventional radiographs. Inthis presentation a 23-year-old female patient who was referred to ourdental clinic with a severe facial trauma is reported. The patient wasinitially examined by a general dentist and a fracture in the mandibularright canine region was diagnosed on the CT images. Once referred to ourclinic, the raw CT images were re-evaluated by three maxillofacialradiologists in the Oral Diagnosis and Radiology Department. Two newfracture lines that were not reported on the original CT analysis werediagnosed among the raw CT images. More detailed information was obtainedabout dentoalveolar fractures with CBCT compared with CT and conventionalradiography. copyright2009 The British Institute of Radiology.

 

http://ovidsp.ovid.com/ovidweb.cgi?T=JS&MODE=ovid&PAGE=fulltext&NEWS=n&D=embv&AUTOALERT=44878584%7c3
 


Evaluation of high-resolution cone beam computed tomography in the detection of simulated interradicular bone lesions.


Authors

Noujeim M. Prihoda T.J. Langlais R. Nummikoski P.

Source

Dentomaxillofacial Radiology.  38(3)(pp 156-162), 2009. Date of Publication: March 2009.

Abstract
[ show ]
Objectives: The purpose of this study is to assess the accuracy oflimited-volume high-resolution cone beam CT (CBCT) in the detection ofperiodontal bone loss. Methods: 163 simulated periodontal lesions ofdifferent depths were created in dried human hemimandibles. Specimens wereimaged using the intraoral paralleling technique and limited-volume CBCT(3DX Accuitomo; Morita Co. Ltd, Kyoto, Japan). Ten viewers examined theimages. Data were analysed with receiver operating characteristics (ROC)analysis. ROC curves were generated and the areas under themaximum-likelihood curves (Az) were compared. Other statistical analyseswere used to detect the normality of the distribution of the results.Results: The results are reported as the individual viewer ROC curve areasfor each of the two imaging modalities. In all experiments the Az area forCBCT (0.770-0.864) was larger than the Az area for periapical film(0.678-0.783); statistical tests showed a statistically significantdifference between the two modalities. Conclusions: Results indicate thatthe CBCT technique has better accuracy and diagnostic value thanperiapical films in the detection of interradicular periodontal bonedefects. copyright2009 The British Institute of Radiology.

 

http://ovidsp.ovid.com/ovidweb.cgi?T=JS&MODE=ovid&PAGE=fulltext&NEWS=n&D=embv&AUTOALERT=44878584%7c4
 


Volumetric tomography - A new tomographic technique for panoramic units.


Authors

Cederlund A. Kalke M. Welander U.

Source

Dentomaxillofacial Radiology.  38(2)(pp 104-111), 2009. Date of Publication: February 2009.

Abstract
[ show ]
Objectives: To introduce a new three-dimensional dental imaging techniquenamed volumetric tomography (VT). Methods: The new VT imaging methodutilizes an iterative frequency-based reconstruction technique. Withiterative algorithms each voxel value is defined multiple times duringreconstruction. Computation time is therefore relatively lengthy. However,multicore processors and graphic board programming reduce thereconstruction time, making it possible to utilize this iterativereconstruction technique in clinical practice. The new VT technique is anadd-on to a standard panoramic unit (Orthopantomograph OP 200 D;Instrumentarium Oy, Tuusula, Finland). Unit enhancements include a devicefor patient positioning and additional software. Preliminary clinicalexaminations have been performed. Results: Examinations demonstrated thatthe new VT technique gives satisfactory volumetric patient data from whichtomographs may be derived for different clinical applications.Conclusions: The new VT method may be employed when tomographicexaminations are required for dental clinical work. copyright 2009 TheBritish Institute of Radiology.

 

http://ovidsp.ovid.com/ovidweb.cgi?T=JS&MODE=ovid&PAGE=fulltext&NEWS=n&D=embv&AUTOALERT=44878584%7c5
 


Characteristics of a newly developed dentomaxillofacial X-ray cone beam CT scanner (CB MercuRay[trademark]): System configuration and physical properties.


Authors

Araki K. Maki K. Seki K. Sakamaki K. Harata Y. Sakaino R. Okano T. Seo K.

Source

Dentomaxillofacial Radiology.  33(1)(pp 51-59), 2004. Date of Publication: January 2004.

Abstract
[ show ]

Objective: The purpose of this paper is to present the systemconfiguration and physical properties of a new dentomaxillofacial X-raycone beam CT system (CB MercuRay[trademark]) being developed. Methods: Thesystem consists of an image intensifier and a cone beam X-ray source.There are two different models of this system, each with a different sizeimage intensifier, 9" or 12". Each system has three field of view (FOV)modes. The 12" system has facial (F), panoramic (P) and implant (I) FOVmodes. The 9" system has P, I and dental (D) modes. Images produced bythese systems consist of 512 x 512 x 512 isotropic voxels. Physicalproperties such as resolution, noise and distortion of the images wereevaluated in this study. Modulation transfer function (MTF) was measuredusing Boone's method. Image noise was measured as the standard deviationof the CT value in water. Circularity of the axial images yielded by thetwo models was measured using an 8 mm diameter acrylic pipe phantom.Results: The resolving power at a MTF of 0.1 in the D mode was over 2.0 lpmm-1, suggesting that this system yields images of high resolution. Thestandard deviation of the CT value in water was approximately 80, which isthought to be greater than that of conventional CT. The circularity ofimages of the pipe phantom was 99% of the ideal value. Conclusion: Thisstudy shows that our newly developed cone beam CT system produces highresolution three-dimensional volumetric images that will be useful for theexamination of dentomaxillofacial disorders. copyright 2004 The BritishInstitute of Radiology.

 

http://ovidsp.ovid.com/ovidweb.cgi?T=JS&MODE=ovid&PAGE=fulltext&NEWS=n&D=embv&AUTOALERT=44878584%7c6
 


Short communication: Intraoperative 3D imaging of the facial skeleton using the SIREMOBIL Iso-C3D.


Authors

Heiland M. Schmelzle R. Hebecker A. Schulze D.

Source

Dentomaxillofacial Radiology.  33(2)(pp 130-132), 2004. Date of Publication: March 2004.

Abstract
[ show ]
Objectives: With respect to high-contrast structures, cone beam computedtomography (CBCT) offers an alternative imaging modality to computedtomography (CT), requiring less radiation exposure. The C-arm systemSIREMOBIL Iso-C 3D for three-dimensional (3D) reconstruction has made thismodality available for intraoperative use. This paper presents the firstintraoperative images of the facial skeleton using the SIREMOBIL Iso-C3D.Methods: Cases of a zygomaticomaxillary complex fracture, a mandibularangle fracture and a bimaxillary repositioning osteotomy are described todemonstrate the application possibilities of this system in maxillofacialsurgery. Results: In addition to the uncomplicated handling of theSIREMOBIL Iso-C3D, generally important was the low level of metalartefacts in its primary and secondary reconstructions, even in closeproximity to the material. However, it has to be kept in mind that whilesoft tissues are visualized using CBCT, information about soft tissuequality cannot be obtained. Conclusion: The SIREMOBIL Iso-C3D generatesintraoperative data sets suitable for the visualization of the facialbones after open reduction of fractures. copyright 2004 The BritishInstitute of Radiology.

http://ovidsp.ovid.com/ovidweb.cgi?T=JS&MODE=ovid&PAGE=fulltext&NEWS=n&D=embv&AUTOALERT=44878584%7c7
 

 


Radiographic examination of the temporomandibular joint using cone beam computed tomography.


Authors

Tsiklakis K. Syriopoulos K. Stamatakis H.C.

Source

Dentomaxillofacial Radiology.  33(3)(pp 196-201), 2004. Date of Publication: May 2004.

Abstract
[ show ]
Cone beam CT (CBCT) is a new technique for maxillofacial imaging. Wedescribe a reconstruction technique for radiographic examination of thetemporomandibular joint (TMJ) using CBCT, and we further present fourcases where the technique was employed. The technique provides a completeradiographic investigation of the bony components of the TMJ. Thereconstructed images are of high diagnostic quality. The examination timeis shorter and the patient dose is lower than that with conventional CT.It may therefore be considered as the imaging technique of choice wheninvestigation of bony changes of the TMJ is the task at hand. copyright2004 The British Institute of Radiology.

 

http://ovidsp.ovid.com/ovidweb.cgi?T=JS&MODE=ovid&PAGE=fulltext&NEWS=n&D=embv&AUTOALERT=44878584%7c8
 


Single air contrast arthrography for temporomandibular joint disorder using limited cone beam computed tomography for dental use.


Authors

Honda K. Matumoto K. Kashima M. Takano Y. Kawashima S. Arai Y.

Source

Dentomaxillofacial Radiology.  33(4)(pp 271-273), 2004. Date of Publication: July 2004.

Abstract
[ show ]

MRI has the problem of artefacts caused by metal or body motion and isalso incompatible for patients with claustrophobia. Arthrography isinvasive and involves the risk of perforation or allergy to a contrastmedium. This report discusses a patient with temporomandibular joint (TMJ)disorder who required soft tissue imaging of the TMJ. As she hadclaustrophobia and a reaction to iodine, air contrast arthrography andpumping manipulation therapy using limited cone beam computed tomographyfor dental use (3DX) was performed. We conclude that the 3DX examinationmethod used in the study is practical as a diagnostic procedure and thusrecommend this method to be used for patients with TMJ disorder in thepresence of iodine contraindication. copyright 2004 The British Instituteof Radiology.

 

http://ovidsp.ovid.com/ovidweb.cgi?T=JS&MODE=ovid&PAGE=fulltext&NEWS=n&D=embv&AUTOALERT=44878584%7c9
 


Computed tomography investigation of temporomandibular joint in surgery of
dento-maxillary anomalies.


Authors

Popescu M.A. Dinca O. Bucur A.

Source

Chirurgia (Bucharest, Romania : 1990).  104(5)(pp 583-590), 2009. Date of Publication: 2009 Sep-Oct.

Abstract
[ show ]

The aim of this study was to evaluate changes in the temporomandibularjoint morphology, regarding the relation between mandibular condyle andfossa, after bilateral sagittal split osteotomy in Angle class IIIdentomaxillary anomalies. Preserving the preoperative position of thecondyle during sagittal split osteotomy is considered important to obtainskeletal and occlusal stability. Cone-beam computed tomography of 20 classIII patients with mandibular prognathism were assessed before and 6 weeksafter operation to evaluate changes of the condylar position. We propose aprotocol for head posture and computed tomography investigation, whichmakes possible the comparison between cone-beam computed tomography (CBCT)in different moments at the same patient. There are no significant changesafter bilateral sagittal split osteotomy regarding joint relations.

 

http://ovidsp.ovid.com/ovidweb.cgi?T=JS&MODE=ovid&PAGE=fulltext&NEWS=n&D=embv&AUTOALERT=44878584%7c10
 


Loma Linda guide: a stereolithographically designed surgical template: technique paper.


Authors

Kleinman A. Leyva F. Lozada J. Patel R.D.

Source

The Journal of oral implantology.  35(5)(pp 238-244), 2009. Date of Publication: 2009.

Abstract
[ show ]

A new flapless technique based on a template fabricated from astereolithographic maxillary model is presented in this article. Theproposed concept can be used to accurately control the tridimensionalposition of the dental implant. The laboratory procedures involving thefabrication of the surgical template are described.

 

http://ovidsp.ovid.com/ovidweb.cgi?T=JS&MODE=ovid&PAGE=fulltext&NEWS=n&D=embv&AUTOALERT=44878584%7c11
 


Implant placement on restricted mesiodistal space with simulation software and guiding system: a case report.


 


Authors

Shiota M. Kihara H. Fujii M. Kasugai S.

Source

Ko[bar]ku[bar]byo[bar] Gakkai zasshi. The Journal of the Stomatological Society, Japan.  76(3)(pp 130-135), 2009. Date of Publication: Oct 2009.

Abstract
[ show ]

A surgical guiding system with simulation software has recently been usedfor safe implant treatment. We report a clinical case in which wesuccessfully used this system for implant treatment of a congenital toothmissing region with severely restricted mesiodistal space. The patient wasa 19-year-old female whose mandibular right deciduous canine was wobblingwithout a successional permanent tooth and who desired implant treatment.CT images showed that this site was narrow buccal-lingually and only fivemillimeters in mesiodistal width. The implant position was planned usingsimulation software (SimPlant : Materialise Dental) based on CT data and asurgical guide template (SurgiGuide : Materialise Dental) was fabricatedprior to the implant surgery. During the implant surgery, the deciduouscanine was extracted under local anesthesia. The implant bed was preparedwith the surgical guide template and an implant was installed. One monthafter surgery, the position of the implant was examined with a cone-beamCT, which demonstrated that the implant position was exactly the same asplanned. At 5 months, a provisional prosthesis was delivered and optimalsoft-tissue condition was formed by modifying the provisional prosthesis.Then, the final impression was taken and a ceramo-metal implant-supportedcrown was delivered. In this case of a congenital tooth missing regionwith narrow space, implant treatment with simulation software and thesurgical guide system provided excellent clinical results.

 

http://ovidsp.ovid.com/ovidweb.cgi?T=JS&MODE=ovid&PAGE=fulltext&NEWS=n&D=embv&AUTOALERT=44878584%7c12
 


Application of a wireless resonance frequency transducer to assess primary stability of orthodontic mini-implants: an in vitro study in pig ilia.


Authors

Su Y.Y. Wilmes B. Honscheid R. Drescher D.

Source
The International journal of oral & maxillofacial implants.  24(4)(pp 647-654), 2009. Date of Publication: 2009 Jul-Aug.

Abstract
[ show ]

PURPOSE: The aim of the study was to evaluate whether resonance frequencyanalysis (RFA) using a wireless transducer can be used to assess theprimary stability of orthodontic mini-implants. MATERIALS AND METHODS:Fifteen orthodontic mini-implants were placed in three ilium bone segmentsof country pigs. The wireless resonance frequency transducer was bonded tothe head of the mini-implants, and RFA values of the mini-implants in bonewere detected and converted into implant stability quotient (ISQ) valuesby the RFA monitor. In addition, the percussion test value, peri-implantradiographic bone density, and cortical bone thickness were measured.RESULTS: The ISQ values of mini-implants correlated linearly withperi-implant radiographic bone density (r = 0.92, P < .0001), corticalbone thickness (r = 0.90, P < .0001), and percussion test values (r =-0.91, P < .0001), respectively. In addition, by means of the calculationof 99% confidence intervals, the absolute values of the three correlationcoefficients ranged from 0.61 to 0.98. CONCLUSION: This in vitro animalstudy showed that the presented RFA method using a wireless transducermight have potential to provide an alternative noninvasive assessment ofthe primary stability of an orthodontic mini-implant.

 

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Incidental findings on dental radiographs: Stafne bone defect.


Authors

Ramesh A.Pabla T.

Source

Journal of the Massachusetts Dental Society.58(3):42-3, 2009.

http://ovidsp.ovid.com/ovidweb.cgi?T=JS&MODE=ovid&PAGE=fulltext&NEWS=n&D=mesz&AUTOALERT=45570744%7c1


Volumetric assessment of secondary alveolar bone grafting using cone beam
computed tomography.


Authors

Oberoi S.Chigurupati R.Gill P.Hoffman WY.Vargervik K.

Source

Cleft Palate-Craniofacial Journal.46(5):503-11, 2009 Sep.

Abstract
OBJECTIVE: To assess the radiographic outcome of secondary alveolar bonegrafting in individuals with nonsyndromic unilateral or bilateral cleftlip and palate using cone beam computed tomography. METHODS: Thisprospective study was conducted at the University of California at SanFrancisco Center for Craniofacial Anomalies on 21 consecutive nonsyndromiccomplete cleft lip and palate individuals between 8 and 12 years of agewho required alveolar bone grafting. Seventeen unilateral and fourbilateral cleft lip and palate individuals had preoperative andpostoperative cone beam computed tomography scans that were analyzed usingAmira 3.1.1 software. RESULTS: The average volume of the preoperativealveolar cleft defect in unilateral cleft lip and palate was 0.61 cm(3),and the combined average volume of the right and left alveolar cleftdefects in bilateral cleft lip and palate was 0.82 cm(3). The averagepercentage bone fill in both unilateral cleft lip and palate and bilateralcleft lip and palate was 84%. The outcome of alveolar bone grafting wasassessed in relation to (1) type of cleft, (2) size of preoperative cleftdefect, (3) presence or absence of lateral incisor, (4) root developmentstage of the maxillary canine on the cleft side, (5) timing, and (6)surgeon. None of these parameters significantly influenced theradiographic outcome of alveolar bone grafting. CONCLUSIONS: Secondaryalveolar bone grafting of the cleft defect in our center was successful,based on radiographic outcome using cone beam computed tomography scans.Volume rendering using cone beam computed tomography and Amira software isa reproducible and practical method to assess the preoperative alveolarcleft volume and the adequacy of bone fill postoperatively.

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Accuracy of intraoral radiography, multidetector helical CT, and limited cone-beam CT for the detection of horizontal tooth root fracture.


Authors

Iikubo M.Kobayashi K.Mishima A.Shimoda S.Daimaruya T.Igarashi C. Imanaka M.Yuasa M.Sakamoto M.Sasano T.

Source

Oral Surgery Oral Medicine Oral Pathology Oral Radiology & Endodontics. 108(5):e70-4, 2009 Nov.

Abstract

OBJECTIVE: The accuracies of intraoral radiography (IOR), multidetectorhelical computerized tomography (MDHCT) at slice thicknesses 0.63 mm and1.25 mm, and limited cone-beam computerized tomography (LCBCT) werecompared for detection of horizontal tooth root fracture. STUDY DESIGN: In7 beagle dogs, 28 maxillary anterior teeth were used, of which 13 hadartificially induced horizontal root fracture. The specimens were examinedby the above-mentioned 4 modalities. Diagnosis of root fracture was basedon direct visualization of radiolucent line in each image by 6radiologists. RESULTS: Sensitivity, negative predictive value, anddiagnostic accuracy (true positives + true negatives) for detectingfracture lines in LCBCT (0.96 +/- 0.04, 0.97 +/- 0.03, 0.93 +/- 0.04,respectively) were significantly higher than MDHCT at 0.63 mm (0.76 +/-0.09, 0.8 +/- 0.05, 0.8 +/- 0.05, respectively), MDHCT at 1.25 mm (0.49+/- 0.09, 0.66 +/- 0.04, 0.69 +/- 0.05, respectively), and IOR (0.51 +/-0.18, 0.67 +/- 0.08, 0.69 +/- 0.08, respectively). Specificity andpositive predictive value showed no significant intermethod differenceamong the 4 modalities. CONCLUSION: Limited cone-beam CT is more usefulthan the other 3 radiographic modalities for diagnostic imaging ofhorizontal tooth root fracture.

http://ovidsp.ovid.com/ovidweb.cgi?T=JS&MODE=ovid&PAGE=fulltext&NEWS=n&D=mesz&AUTOALERT=45570744%7c3
 


Cone-beam computerized tomographic, radiographic, and histologic evaluation of periapical repair in dogs' post-endodontic treatment.


Authors

de Paula-Silva FW.Junior MS.Leonardo MR.Consolaro A.da Silva LA.

Source

Oral Surgery Oral Medicine Oral Pathology Oral Radiology & Endodontics. 108(5):796-805, 2009 Nov.

Abstract
OBJECTIVE: To evaluate the periapical repair after root canal treatment inthe teeth of dogs using CT and conventional radiography and to comparethese findings with the gold standard microscopic evaluation. STUDYDESIGN: The animals were divided into three groups according to endodontictreatment performed: Group 1, single-visit endodontic treatment in teethwithout apical periodontitis; Group 2, single-visit endodontic treatmentin teeth with apical periodontitis; and Group 3, endodontic treatment inteeth with apical periodontitis using calcium hydroxide as a root canaldressing. Group 4 consisted of teeth with apical periodontitis notsubmitted to root canal treatment and Group 5 consisted of healthy teethwithout periapical disease. Radiographic, tomographic, and microscopicevaluations were performed by blind examiners. At 180 days experimentaltime, CT and radiographic measurements of periapical disease were comparedwith the gold standard microscopic measurement using intraclasscorrelation coefficient. Intergroup comparisons considering differentmethods of periapical lesions measurement or different clinical protocolsof root canal treatment were performed by Kruskal Wallis test followed byDunn. Integrity of lamina dura, presence of radiolucent areas, andpresence of root resorption were analyzed by Fisher's exact test. RESULTS:There was discontinuity of the lamina dura and CPD in all teeth fromGroups 2, 3, and 4 evaluated by tomography and radiography 45 days afterCPD induction. Radiographically, 180 days after root canal treatment,there was no periapical lesion in teeth from Groups 1 and 3, differentfrom groups 2 and 4 (p < .05). The highest reduction in the CPD size wasobserved on Group 3 (p < .05). According to the tomographic results, therewas decrease of the size of the CPD on Group 3 but not on Groups 2 or 4.However, in all groups the periapical lesions presented largermesio-distal extension if compared with radiography, both 45 days afterCPD induction and 180 days after root canal treatment. At 180 days, CTmeasurements were closely related to microscopic results (ICC = 0.95)differently from radiographic evaluation (ICC = 0.86). CONCLUSION: CT Scanevaluation of periapical repair following root canal treatment providedsimilar information than that obtained by microscopic analysis, whereasradiographic evaluation underestimated the size do periapical lesion.

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Evaluation of the human airway using cone-beam computerized tomography.


Authors

Tso HH.Lee JS.Huang JC.Maki K.Hatcher D.Miller AJ.

Source

Oral Surgery Oral Medicine Oral Pathology Oral Radiology & Endodontics. 108(5):768-76, 2009 Nov.

Abstract
OBJECTIVE: The goal of this project was to define and measure human airwayspace with radiographic volumetric 3-dimensional imaging and digitalreconstruction of the pharynx using cone-beam computerized tomography.STUDY DESIGN: This was a randomized retrospective study. Ten patient scanswere selected randomly from a pool of 196 subjects seeking dentaltreatment at the University of California, San Francisco. Digital Imagingand Communications in Medicine-format volume images were captured using alow-radiation rapid-scanning cone-beam computerized tomography system(Hitachi MercuRay). RESULTS: Detailed progressive rostrocaudalcross-sectional area histograms indicated that 8 of the 10 subjectsdemonstrated a region of maximum constriction near the oropharynx level.The most restricted cross-sectional area varied from 90 mm(2) to 360mm(2). CONCLUSIONS: The maximum constriction of the airway in 10 subjectsquietly breathing for 10 seconds indicated variation in the level of thepharynx and the extent of the rostrocaudal zone of restriction.

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Three-dimensional superimposition of the skull base for the longitudinal evaluation of the effects of growth and of treatment. [French]


Authors

Cevidanes LH.Styner M.Proffit WR.

Source

Orthodontie Francaise.80(4):347-57, 2009 Dec.

Abstract
To evaluate growth or treatment change, superimposition of serialradiographs on a stable reference structure is necessary. In 2-Dcephalometrics, the cranial base is often used for this purpose because itshows minimal changes after neural growth is completed, but the cranialbase landmarks in lateral or P-A cephalograms are unreliable when otherorientations are evaluated. In this paper we present a novel method for3-D superimposition based on fully-automated voxel-wise registration ofthe surface cranial base. The software packages allow quantitativeassessment of changes between two time points via calculation of theEuclidean distances between the surfaces of the 3-D models, and visualassessment of the location and magnitude of changes in the jaws over timevia graphical overlays in which changes are shown in color maps. Thisenables a detailed examination of the adaptation patterns for patients whoexperience clinically significant skeletal changes with growth and/ortreatment.

http://ovidsp.ovid.com/ovidweb.cgi?T=JS&MODE=ovid&PAGE=fulltext&NEWS=n&D=mesz&AUTOALERT=45570744%7c6
 


Panorametry: suggestion of a method for mandibular measurements on panoramic radiographs.


Authors

Puricelli E.

Source

Head & Face Medicine.5:19, 2009.

Abstract
BACKGROUND: Orthopantomography (panoramic radiography) has been used forthe study of measurements involving particularly the prediction of theeruption of impacted lower third molars and analyses of measurements ofthe ramus and head of mandible. The discrepancies involved with theprojection of this radiographic image has stimulated the search forfurther ways to use it, particularly in orthodontic treatments and oraland maxillofacial surgeries. The author proposes a graphimetric method forthe mandible, based on panoramic radiography. The results are expressed inlinear and angular measurements, aiming at bilateral comparisons as wellas the determination of the proportion of skeletal and dental structures,individually and among themselves as a whole. The method has been namedPanorametry, and allows measurement of the mandible (MandibularPanorametry) or the posterior mandibular teeth (Dental Panorametry). Whencombining mandible and maxilla, it should be referred to as TotalPanorametry. It may also be used, in the future, with Cone Beam computedtomography (CT) images, and in this case it may be mentioned as CTPanorametry.

http://ovidsp.ovid.com/ovidweb.cgi?T=JS&MODE=ovid&PAGE=fulltext&NEWS=n&D=mesz&AUTOALERT=45570744%7c7
 


A simple technique for independent torque control with miniscrew
anchorage.


Authors

Kook YA.Kim SH.Mo SS.

Source

Journal of Clinical Orthodontics.43(9):566-71; quiz 581, 2009 Sep.

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Dynamic cone-beam computed tomography in orthodontic treatment.


Authors

Chenin DL.Chenin DA.Chenin ST.Choi J.

Source

Journal of Clinical Orthodontics.43(8):507-12, 2009 Aug.

http://ovidsp.ovid.com/ovidweb.cgi?T=JS&MODE=ovid&PAGE=fulltext&NEWS=n&D=mesz&AUTOALERT=45570744%7c9
 


The role of Cone beam CT in the evaluation and management of a family with Gardner's syndrome.


Authors

Kamel SG.Kau CH.Wong ME.Kennedy JW.English JD.

Source

Journal of Cranio-Maxillo-Facial Surgery.37(8):461-8, 2009 Dec.

Abstract
Gardner's syndrome (GS) is a hereditary autosomal dominant disease of thecolon that presents with extra-colonic manifestations such as osteomas,skin lesions and dental abnormalities. Osteomas are commonly found in theskull, jaws and the paranasal sinuses. We present a family of four sistersaffected with GS with a wide range of anomalies. The role of Cone beamcomputed tomography (CBCT) in the early detection and evaluation ofosteomas and dental anomalies with precise assessment of theirrelationship to adjacent anatomic structures is described here in detail.The careful interpretation of CBCT may be of a great value in surgical andorthodontic treatment planning in the presence of jaw lesions. Managementof dental problems in GS may be challenging due to the presence ofodontomas and increased bone density. A multidisciplinary approach in themanagement of GS can achieve the best treatment results.

http://ovidsp.ovid.com/ovidweb.cgi?T=JS&MODE=ovid&PAGE=fulltext&NEWS=n&D=mesz&AUTOALERT=45570744%7c10


Bone grafting assessment: focus on the anterior and posterior maxilla utilizing advanced 3-D imaging technologies.


Authors

Ganz SD.

Source

Dental Implantology Update.20(6):41-8, 2009 Jun.

http://ovidsp.ovid.com/ovidweb.cgi?T=JS&MODE=ovid&PAGE=fulltext&NEWS=n&D=mesz&AUTOALERT=45570744%7c11
 


Anterior Stafne's bone cavity mimicking a periapical lesion of endodontic origin: report of two cases.


Authors

Bornstein MM.Wiest R.Balsiger R.Reichart PA.

Source

Journal of Endodontics.35(11):1598-602, 2009 Nov.

Abstract
INTRODUCTION: This report of 2 cases describes the diagnostic proceduresused to identify 2 Stafne's bone cavities (SBC) found in unusuallyanterior locations in the mandible, both mimicking periapical lesions ofendodontic origin. METHODS: In the first patient, a 47-year-old man, anSBC was diagnosed in the area of teeth #27, 28, and 29. In the secondpatient, a 62-year-old man, the SBC was a fortuitous finding, because thispatient was referred for dental implant therapy. RESULTS: In both cases,the final diagnosis was achieved by using limited cone beam computedtomography (CBCT) and magnetic resonance imaging (MRI). In both patients,the lingual bone cavity was found to be occupied by accessory salivarygland tissue. CONCLUSIONS: The combination of CBCT and MRI as noninvasivediagnostic techniques seems ideal to avoid surgical explorations,incisional biopsies, or enucleations of the lesion for diagnostic purposes.

http://ovidsp.ovid.com/ovidweb.cgi?T=JS&MODE=ovid&PAGE=fulltext&NEWS=n&D=mesz&AUTOALERT=45570744%7c12
 


Method to evaluate inflammatory root resorption by using cone beam computed tomography.


Authors

Estrela C.Bueno MR.De Alencar AH.Mattar R.Valladares Neto J. Azevedo BC.De Araujo Estrela CR.

Source

Journal of Endodontics.35(11):1491-7, 2009 Nov.

Abstract

INTRODUCTION: The aim of this study was to evaluate a method to measureinflammatory root resorption (IRR) by using cone beam computed tomography(CBCT) scans. METHODS: IRR sites were classified according to root thirdand root surface, and IRR extension was measured on the axial, transverse,and tangent views of 3-dimensional CBCT scans by using the Planimpsoftware. A 5-point (0-4) scoring system was used to measure the largestextension of root resorption. A total of 48 periapical radiographs andCBCT scans originally taken from 40 patients were evaluated. The kappacoefficient was used to assess interobserver agreement and the chi(2) testto determine significant differences between the imaging methods. Thelevel of significance was set at alpha = 1%. RESULTS: IRR was detected in68.8% (83 root surfaces) of the radiographs and 100% (154 root surfaces)of the CBCT scans (P < .001). The extension of IRR was >1-4 mm in 95.8% ofthe CBCT images and in 52.1% of the images obtained by using theconventional method (P < .001). CONCLUSIONS: CBCT seems to be useful inthe evaluation of IRR, and its diagnostic performance was better than thatof periapical radiography.

http://ovidsp.ovid.com/ovidweb.cgi?T=JS&MODE=ovid&PAGE=fulltext&NEWS=n&D=mesz&AUTOALERT=45570744%7c13
 


Detectability of chemically induced periapical lesions by limited conebeam computed tomography, intra-oral digital and conventional film radiography.


Authors

Sogur E.Baksi BG.Grondahl HG.Lomcali G.Sen BH.

Source

Dento-Maxillo-Facial Radiology.38(7):458-64, 2009 Oct.

Abstract
OBJECTIVE: Our aim was to compare the Accu-I-Tomo (3DX), the Digora Optimeimage plate system and F-speed film in detecting chemically created apicallesions. METHODS: Lesions were created by applying perchloric acid apicalto extracted teeth in jaw specimens for 1, 1.5 or 2 h. After beingrepositioned, teeth were radiographed with Accu-I-Tomo limited cone beamCT (LCBCT), Digora Optime storage phosphor plates (SPP) and F-speed films.Six observers scored the presence of lesions using a five-grade scale. Theaccuracy of each observer and modality was assessed through receiveroperating characteristic (ROC) analysis and A(z) values were comparedusing two-way ANOVA. Pairwise comparisons of imaging systems were carriedout using the Mann-Whitney U-test. Differences in A(z) values werecompared using Friedman and Dunn's tests. Kappa (kappa) was used tomeasure interobserver agreement. RESULTS: The A(z) values were larger forLCBCT than for SPP and film for all acid durations. For 1 h of acidduration a significant difference was found between LCBCT and film (P =0.02) and between LCBCT and SPP (P = 0.0043), For 1.5 h a significantdifference (P = 0.006) was found between LCBCT and SPP only. For 2 h acidduration, there was no significant difference between LCBCT and film orSPP (P>0.05). Between SPP and film no significant difference was found forany acid duration (P>0.05). kappa ranged between fair and moderate forLCBCT and between slight and fair for SPP and film. CONCLUSION: LCBCTimages provided better than or similar detectability as film and SPPimages of chemically created periapical lesions.

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A comparative study of high-resolution cone beam computed tomography and charge-coupled device sensors for detecting caries.

Authors

Young SM.Lee JT.Hodges RJ.Chang TL.Elashoff DA.White SC.

Source

Dento-Maxillo-Facial Radiology.38(7):445-51, 2009 Oct.

Abstract
OBJECTIVES: Conventional radiographic imaging of teeth underestimates thepresence of caries. The objective of this study was to compare theefficacy of high-resolution cone beam CT (CBCT) images and conventionalcharge-coupled device (CCD) images for detecting proximal and occlusalcaries. METHODS: Non-restored, extracted human permanent premolar andmolar teeth were mounted and then imaged with a 3DX Accuitomo and a CCD.We selected 92 occlusal and 100 proximal surfaces for raters to score. Ofthese, 36 and 25, respectively, had lesions extending into dentin. Using afive-step confidence scale, eight practising dentists evaluated the imagesfor the presence of caries in dentin using both modalities. Actualpresence and extent of caries was established with microCT imaging.RESULTS: For proximal surface lesions extending into dentin, the averagesensitivity score using 3DX images (0.61) was almost twice that of CCDimages (0.33) and the difference was significant. The specificity valuesfor both systems were high and not significantly different from eachother. For occlusal surfaces, raters detected significantly more lesionsin the enamel or dentin when using the 3DX images than when using CCDimages. However, the raters also had significantly lower averagespecificity scores for the 3DX images compared with the CCD images forlesions at both depths. CONCLUSIONS: Practising dentists were able toimprove their detection of proximal-surface caries extending into thedentin, but not occlusal caries, using 3DX high-resolution cone beam CTimages compared with CCD images.

http://ovidsp.ovid.com/ovidweb.cgi?T=JS&MODE=ovid&PAGE=fulltext&NEWS=n&D=mesz&AUTOALERT=45570744%7c15
 


The use of navigation (BrainLAB Vector vision(2)) and intraoperative 3Dimaging system (Siemens Arcadis Orbic 3D) in the treatment of gunshotwounds of the maxillofacial region.



Authors

Grobe A.Weber C.Schmelzle R.Heiland M.Klatt J.Pohlenz P.

Source

Oral & Maxillofacial Surgery.13(3):153-8, 2009 Sep.

Abstract
PURPOSE: Gunshot wounds are a rare occurrence during times of peace. Theremoval of projectiles is recommended; in some cases, however, this is acontroversy. The reproduction of a projectile image can be difficult if itis not adjacent to an anatomical landmark. Therefore, navigation systemsgive the surgeon continuous real-time orientation intraoperatively. Theaim of this study was to report our experiences for image-guided removalof projectiles and the resulting intra- and postoperative complications.PATIENTS AND METHODS: We investigated 50 patients retrospectively; 32 hadimage-guided surgical removal of projectiles in the oral and maxillofacialregion. Eighteen had surgical removal of projectiles without navigationassistance. RESULTS: There was a significant correlation (p = 0.0136)between the navigated surgery vs. not-navigated surgery and complicationrate, including major bleeding (n = 4 vs. n = 1, 8% vs. 2%), soft tissueinfections (n = 7 vs. n = 2, 14% vs. 4%), and nerval damage (n = 2 vs. n =0, 4% vs. 0%; p = 0.038) and between the operating time and postoperativecomplications. A high tendency between operating time and navigatedsurgery (p = 0.1103) was shown. When using navigation system, we couldreduce operating time. CONCLUSION: In conclusion, there is a significantcorrelation between reduced intra- and postoperative complications,including wound infections, nerval damage, and major bleeding, and theappropriate use of a navigation system. In all these cases, we couldpresent reduced operating time. Cone-beam computed tomography plays animportant role in detecting projectiles or metallic foreign bodiesintraoperatively.

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Computed tomography investigation of temporomandibular joint in surgery of dento-maxillary anomalies.

Authors

Popescu MA.Dinca O.Bucur A.

Source

Chirurgia (Bucuresti).104(5):583-90, 2009 Sep-Oct.

Abstract
The aim of this study was to evaluate changes in the temporomandibularjoint morphology, regarding the relation between mandibular condyle andfossa, after bilateral sagittal split osteotomy in Angle class IIIdentomaxillary anomalies. Preserving the preoperative position of thecondyle during sagittal split osteotomy is considered important to obtainskeletal and occlusal stability. Cone-beam computed tomography of 20 classIII patients with mandibular prognathism were assessed before and 6 weeksafter operation to evaluate changes of the condylar position. We propose aprotocol for head posture and computed tomography investigation, whichmakes possible the comparison between cone-beam computed tomography (CBCT)in different moments at the same patient. There are no significant changesafter bilateral sagittal split osteotomy regarding joint relations.

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Loma Linda guide: a stereolithographically designed surgical template: technique paper.


Authors

Kleinman A.Leyva F.Lozada J.Patel RD.

Source

Journal of Oral Implantology.35(5):238-44, 2009.

Abstract
A new flapless technique based on a template fabricated from astereolithographic maxillary model is presented in this article. Theproposed concept can be used to accurately control the tridimensionalposition of the dental implant. The laboratory procedures involving thefabrication of the surgical template are described.

http://ovidsp.ovid.com/ovidweb.cgi?T=JS&MODE=ovid&PAGE=fulltext&NEWS=n&D=mesz&AUTOALERT=45570744%7c18