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Download or read book The Accuracy of Panoramic Radiography in the Assessment of Mesiodistal Tooth Angulations at Varying Horizontal and Vertical Head Positions written by and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
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Author : Ian William McKee
Publisher : National Library of Canada = Bibliothèque nationale du Canada
ISBN 13 :
Total Pages : 244 pages
Book Rating : 4.:/5 (481 download)
Download or read book The Accuracy of Panoramic Radiography in the Assessment of Mesiodistal Tooth Angulations at Varying Horizontal and Vertical Head Positions [microform] written by Ian William McKee and published by National Library of Canada = Bibliothèque nationale du Canada. This book was released on 2001 with total page 244 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Nicole C. Brummer
Publisher :
ISBN 13 :
Total Pages : 124 pages
Book Rating : 4.:/5 (575 download)
Download or read book Validity and Reliability of Two Objective Grading Systems in the Assessment of Mesiodistal Tooth Angulations Using Various Panoramic Systems and Projections written by Nicole C. Brummer and published by . This book was released on 2004 with total page 124 pages. Available in PDF, EPUB and Kindle. Book excerpt: Background and significance: In 1998 the American Board of Orthodontics (ABO) introduced the Objective Grading System (OGS) for assessing the quality of candidates' treatment results. Purpose: To compare the effect of panoramic image modality and head position on the score obtained applying the ABO's OGS using one of two reference planes for the assessment of root angulation of anterior teeth. Methods: This is a retrospective study using images of 3 "representative models." Radiographs were taken on 3 panoramic x-ray machines, the OP-100 (normal mode and the "Orthozone" mode), Orthophos SD and PC-1000, at five different head positions. Results: Significant differences were found between image modality, head position, and method of measurement. Conclusions: We recommend the clarification of the instructions and assessment of the panoramic radiograph with respect to various head positioning and panoramic equipment used prior to this analysis to provide a tolerance of up to 5 points.
Author :
Publisher :
ISBN 13 :
Total Pages : 1526 pages
Book Rating : 4.:/5 (319 download)
Download or read book Index Medicus written by and published by . This book was released on 2002 with total page 1526 pages. Available in PDF, EPUB and Kindle. Book excerpt: Vols. for 1963- include as pt. 2 of the Jan. issue: Medical subject headings.
Author : Ravindra Nanda
Publisher :
ISBN 13 :
Total Pages : 358 pages
Book Rating : 4.3/5 (91 download)
Download or read book Biomechanics in Clinical Orthodontics written by Ravindra Nanda and published by . This book was released on 1997 with total page 358 pages. Available in PDF, EPUB and Kindle. Book excerpt: This state-of-the-art resource is the first book to describe how the principles of biomechanics can be applied successfully to clinical orthodontics. Leaders in the field present comprehensive and cohesive guidance on orthodontic fundamentals, considerations in choosing orthodontic wire, treatment planning, and techniques for correcting a full range of conditions. Excellent line drawings and illustrations clarify important information, and an easy-to-follow format makes the book an ideal quick reference.
Author : Ed Karim
Publisher :
ISBN 13 :
Total Pages : 146 pages
Book Rating : 4.:/5 (948 download)
Download or read book Evaluation of Tooth Angulation Measured on Cone Beam Computed Tomography and Panoramic Radiographs written by Ed Karim and published by . This book was released on 2014 with total page 146 pages. Available in PDF, EPUB and Kindle. Book excerpt: Panoramic radiographs have been used for decades in the field of dentistry and in orthodontics in particular. Panoramic radiography use in orthodontics includes (but is not limited to): pre-treatment dental assessment, dental age estimation, the detection of dental anomalies, the identification of missing and impacted teeth, the prognosis for unerupted teeth, periodontal tissue assessment and pre-finishing root parallelism. The determination and validity of root position has been debated by many authors and practitioners. Knowledge regarding the production of panoramic radiographs questions whether they are the best way of judging tooth angulation. Aims: The main aim of this study was to assess dental angulation measurements generated by two panoramic x-ray machines. An attempt would be made to correct appraisal differences and, therefore, render the films more useful in providing the necessary diagnostic information to achieve optimal orthodontic treatment results. Methods: A dry human skull with an inserted typodont was imaged using two different panoramic machines in addition to a CBCT machine. Teeth within the typodont had metal markers attached to their coronal and apical ends. The markers and therefore the long axes of the teeth were identified. Teeth were divided into 5 groups (Anterior-Anterior, Anterior- Premolar, Premolar-Premolar, Premolar-Molar and Molar-Molar). The angles between adjacent teeth were measured on an "OPG extrapolation" produced by tracing markers directly on panoramic radiographs. The same measurements were performed on "Focal Trough Specific extrapolations" which were produced by applying the panoramic machine-specific focal trough around the coordinates of the coronal and apical markers. Each machine had its own "OPG extrapolation" and "Focal Trough Specific extrapolation". The four extrapolations were compared. Results: A wide range of variation in tooth angulation was found between the measurements of each machine. For the Carestream machine, the Premolar-Molar and Molar-Molar regions were represented poorly on panoramic radiographs. While for the Vatech machine, Premolar- Premolar and Anterior-Premolar were the groups represented least accurately on the panoramic radiographs. Conclusion: Panoramic radiographs should be interpreted with caution when assessing tooth angulations. Panoramic x-ray machine manufacturers should be encouraged to provide a range of error values to help practitioners have a better understanding of the limitations of panoramic radiographic interpretation.
Author : Samuel P. Wise
Publisher :
ISBN 13 :
Total Pages : 64 pages
Book Rating : 4.:/5 (495 download)
Download or read book Mesiodistal Root Angulation Shown on Conventional and Reconstructed Panoramic Radiographs written by Samuel P. Wise and published by . This book was released on 2009 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt: Introduction: In orthodontic practice, if root alignment is not ideal on a panoramic radiograph, teeth may be re-bracketed to change the root alignment. Thus, a panoramic radiograph's accuracy in representing root alignment is crucial in treatment planning and clinical decisions. The purpose of the present study is to quantitate the difference between actual mesiodistal root angulations measured from a human skull and root angulations projected radiographically on conventional panoramic radiographs and panoramic radiographs reconstructed using cone beam CT volumetric data. Methods: True mesiodistal tooth angulations relative to an orthodontic archwire were determined using a coordinate measuring machine. The skull was imaged in a conventional panoramic unit and an i-CAT CBCT machine. Conventional panoramic radiographs and panoramic images reconstructed from CBCT volumetric data were measured to determine the projected mesiodistal root angulations. Results: Excluding the third molars, only 57.1 to 64.3% of the projected radiographic measurements were within an acceptable range of +/- 2.5" for reconstructed panoramic radiographs versus 53.6% for the conventional panoramic radiograph. Conclusions: Conventional and reconstructed panoramic projections do not represent reliable information related to mesiodistal root angulation. Care should be taken when accessing root angulation on a panoramic image, especially when the patient differs from dental and skeletal norms.
Author : Allan G. Farman
Publisher : Springer Science & Business Media
ISBN 13 : 3540462309
Total Pages : 236 pages
Book Rating : 4.5/5 (44 download)
Download or read book Panoramic Radiology written by Allan G. Farman and published by Springer Science & Business Media. This book was released on 2007-08-16 with total page 236 pages. Available in PDF, EPUB and Kindle. Book excerpt: Panoramic radiology systems are currently being used in more practices than at other any time in the past. The practitioner now has decisions to make regarding detector technology selection for image acquisition and must remain informed about appropriate usage. This book is applicable to all panoramic dental images and equipment. It approaches panoramic radiology usage in the context of general and specialty applications.
Author : Eric Grant Fox
Publisher :
ISBN 13 :
Total Pages : 76 pages
Book Rating : 4.:/5 (631 download)
Download or read book Accuracy of Panoramic Radiographs written by Eric Grant Fox and published by . This book was released on 2005 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: The purpose of this study is to determine the accuracy of panoramic radiography in determining the vertical bone height from the superior crest to the inferior alveolar canal in human mandibles. The experiment is performed in order to assist practitioners who place dental implants to utilize panoramic radiographs in safe treatment planning and dental implant surgery. Eighteen human cadaver mandibles were obtained and panoramic radiographs were taken with two 4.5 millimeter BB's placed bilaterally. The BB's were placed posterior to the mental foramen. Three experienced dental implant surgeons measured the radiographs in millimeters. The actual measurements were obtained by an independent non-examiner of radiographs. Multiple linear regression analysis was used to statistically analyze the data. Upper and lower confidence bounds were obtained to determine reliability. The confidence interval for the mean prediction showed good reliability in using panoramic radiography for implant placement. However, using individual predictor values indicated that orthopantomographs may not always be reliable in use of dental implant surgery to avoid injury to the inferior alveolar nerve.
Author : Lincoln R. Manson-Hing
Publisher : Charles C. Thomas Publisher
ISBN 13 :
Total Pages : 232 pages
Book Rating : 4.3/5 (91 download)
Download or read book Panoramic Dental Radiography written by Lincoln R. Manson-Hing and published by Charles C. Thomas Publisher. This book was released on 1980 with total page 232 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : D. Rodney Bassham
Publisher :
ISBN 13 :
Total Pages : 122 pages
Book Rating : 4.:/5 (396 download)
Download or read book The Effects of Varying Vertical Angulations on the Dimensional Accuracy of Radiographic Images Produced by the Paralleling Technique written by D. Rodney Bassham and published by . This book was released on 1978 with total page 122 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Dana Colette Van Elslande
Publisher :
ISBN 13 :
Total Pages : 176 pages
Book Rating : 4.:/5 (753 download)
Download or read book The Accuracy of Cone Beam Computed Tomography (CBCT) Panoramic-like Images in the Projection of Mesiodistal Tooth Angulations written by Dana Colette Van Elslande and published by . This book was released on 2009 with total page 176 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Robert Christensen
Publisher :
ISBN 13 :
Total Pages : 248 pages
Book Rating : 4.:/5 (432 download)
Download or read book An in Vitro Comparison of Working Length Accuracy Between a Digital System and Conventional Film when Vertical Angulation of the Object is Variable written by Robert Christensen and published by . This book was released on 2009 with total page 248 pages. Available in PDF, EPUB and Kindle. Book excerpt: Accurate determination of working length during endodontic therapy is critical in achieving a predictable and successful outcome. Working length is determined by the use of electronic apex locators, tactile perception, knowledge of average tooth lengths and dental radiography. Due to the increasing use of digital radiography in clinical practice, a comparison with conventional film in working length determination is justified. The purpose of this study is to determine if there is a difference between Schick digital radiography and Kodak Ultra-speed film in the accurate determination of working lengths when vertical angulation of the object is variable. Twelve teeth with #15 K-flex files at varying known lengths from the anatomical apex were mounted in a resin-plaster mix to simulate bone density. A mounting jig for the standardization of projection geometries allowed for exact changes in vertical angulation as it related to the object (tooth) and the film/sensor. Each tooth was imaged using Schick CDR and Kodak Ultra-speed film at varying angles with a consistent source-film distance and exposure time. Four dental professionals examined the images and films independently and measured the distance from the tip of the file to radiographic apex and recorded their results. The error in working length was calculated as the observed value minus the known working length for each tooth type. A mixed-effects, full-factorial analysis of variance (ANOVA) model was used to model the error in working length. Included in the ANOVA model were fixed effects for type of image, vertical angulation, and the interaction of angle and film type. Tooth type and examiner were included in the model as random effects assuming a compound symmetry covariance structure. The repeatability of each examiner, for each film type, was assessed by estimating the intra-class correlation coefficient (ICC). The ICC was determined when 12 randomly selected images and radiographs were reevaluated 10 days after initial measurements. The repeatability of each examiner for Schick CDR was good with ICCs ranging from 0.67 to 1.0. Repeatability for the conventional film was poor with ICCs varying from -0.29 to 0.55. We found the error in the working length was not significantly different between film types (p = 0.402). After adjusting for angle, we found that error in the working length from the digital image was only 0.02 mm greater (95-percent CI: -0.03, 0.06) than the conventional film. Furthermore, there was not a significant difference among the angles (p = 0.246) nor in the interaction of image type with angle (p = 0.149). Based on the results of our study, we conclude that there is not a statistically significant difference in determining working length between Schick CDR and Kodak Ektaspeed film when vertical angulation is modified.
Author : Elsevier Clinics
Publisher : Elsevier Health Sciences
ISBN 13 : 0323813046
Total Pages : 281 pages
Book Rating : 4.3/5 (238 download)
Download or read book Radiographic Interpretation for the Dentist, An Issue of Dental Clinics of North America, E-Book written by Elsevier Clinics and published by Elsevier Health Sciences. This book was released on 2021-06-03 with total page 281 pages. Available in PDF, EPUB and Kindle. Book excerpt: This issue of Dental Clinics focuses on Radiographic Interpretation for the Dentist and is edited by Dr. Mel Mupparapu. Articles will include: Fundamentals of Radiographic Interpretation for the Dentist; Radiology of Dental Caries; Radiographic Diagnosis of Periodontal Disease; Radiology in Endodontics; Imaging in Oral & Maxillofacial Surgery; Radiographic Interpretation in Oral Medicine and Hospital Dental Practice; Intraoral Scanning, Digital Dental Casts, Face Scans, and Cone Beam CT Integration for the Virtual Patient; Pathologic and Physiologic Calcifications of the Head and Neck Significant to the Dentist; Radiographic Diagnosis of Systemic Diseases Manifested in Jaws; Imaging in Prosthodontic Practice; Imaging in Orthodontics; Radiographic Diagnosis in the Pediatric Dental Patient; and more!
Author : Birgit Junfin Glass
Publisher :
ISBN 13 :
Total Pages : 34 pages
Book Rating : 4.3/5 (91 download)
Download or read book Successful Panoramic Radiography written by Birgit Junfin Glass and published by . This book was released on 2000 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 110 pages
Book Rating : 4.:/5 (913 download)
Download or read book The Effect of the Buccolingual Inclination of Teeth on the Projected Mesiodistal Angulation Observed in Panoramic Radiographs written by and published by . This book was released on 2013 with total page 110 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Olaf E. Langland
Publisher : Lippincott Williams & Wilkins
ISBN 13 : 9780781729659
Total Pages : 486 pages
Book Rating : 4.7/5 (296 download)
Download or read book Principles of Dental Imaging written by Olaf E. Langland and published by Lippincott Williams & Wilkins. This book was released on 2002 with total page 486 pages. Available in PDF, EPUB and Kindle. Book excerpt: This new edition successfully combines elements of radiographic technique with interpretation information for readers. Five sections cover the concepts of radiologic imaging, radiographic techniques and procedures, special imaging techniques, radiation health, and assessment and interpretation. Based on the Oral and Maxillofacial Radiology guidelines published by the American Association of Dental Schools, this unique book features numerous high-quality photographs, radiographs, and line drawings. New information on digital radiography, radiation health, periodontal disease, and image assessment is included, as well as chapter review questions, case-based questions, and workshop and laboratory exercises. To help readers prepare for certification, sample multiple-choice and case-based questions for the National and State Board Certification Examinations are also included.
