Download or read book Tomographic Evaluation of Mandibular Molar Alveolar Bone for Immediate Implant Placement U00f1 A Retrospective Cross Sectional Study written by Vinayak Umesh Shirsekar and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: IntroductionTraditional dental implant practice dictates a healing period after tooth extraction, and a second procedure, to place the implants. With the advent of immediate implant placement protocol, fewer surgical procedures and a reduced treatment period was achieved. For immediate implant placement in the mandibular molar region, the quantity of the interradicular bone (IRB), limiting structures like the inferior alveolar nerve and dimensions of the socket affect the overall success rate.AimThe aim of this study was to retrospectively evaluate the alveolar dimensions of the mandibular first molar using cone beam computed tomography (CBCT) for prospective immediate implant placement.Materials and MethodThe material for this retrospective study comprised of CBCT images taken using the same scanning machine (Galileosu00ae, Sirona, Germany) with a standardized patient positioning and exposure factors (0.4 mm Voxel, 120 kVp, 3u20138 mA). The following measurements were done for the permanent mandibular first molar for prospective immediate implant placement u2013 1) The width of buccal (WB) and lingual (WL) bone 2mm apical from the crest 2) The distance from the inferior alveolar nerve to the furcation (IAN-F) in the mid slice 3) The distance from the inferior alveolar nerve to the apex of the mesial (IAN-M) and distal (IAN-D) root 4) The mesio-distal (MD) and bucco-lingual (BL) socket size at the crest level 5) The width of the IRB 2mm (IRB2) and 4mm (IRB4) apical to the furcation, and at the root apex (IRBA) between the mesial and distal root. Descriptive statistical analysis of all data was done at alpha 0.05 (95% confidence intervals).ResultsThe CBCT images of 200 permanent mandibular first molars from 126 patients (83 males, 43 females; mean age 44.2 years) were evaluated. The MD and BL socket size at the crest was 8.77mm and 7.76mm respectively. The WB and WL, that determines the bone fill in the socket, averaged at 0.91mm and 2.92mm respectively, showing a statistically significant difference (p = 0.003). Among the scans evaluated, 48% had WB values 0.5mm. The IRB of the mandibular first molar, which influences the primary stability of the immediate implant, had a mean dimension of 2.12mm, 2.63mm and 4.35mm at IRB2, IRB4 and IRBA respectively. Only 18% of the subjects had an average IRB value 4mm. The IAN-F value averaged at 13.82mm, while the IAN-M and IAN-D values were 4.31mm and 4.61mm respectively, showing no significant difference (p = 0.15). Only 3% of the study population had IAN-F values

Download or read book Dental CT Third Eye in Dental Implants written by Prashant P Jaju and published by JP Medical Ltd. This book was released on 2012-12-30 with total page 86 pages. Available in PDF, EPUB and Kindle. Book excerpt: 1. Introduction to Dental Implants. 2. Conventional Imaging and Dental Implants 3. History of Dental CT 4. Working of Dental CT 5. Anatomical Landmarks as on Dental CT 6. Dental CT in Implantology 7. Dental CT in Periodontics 8. Dental CT in Oral and Maxillofacial Surgery 9. Dental CT in Endodontics 10. Advances in Implant Imaging 11. Case Study Index

Download or read book Tomographic Evaluation of the Marginal Alveolar Bone Crest Stability in Implants Installed in Posterior Maxilla written by Juliano Rodrigues Ribond and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Peri-implant bone stability is a difficult control factor and it is determinant to success or failure of osseointegrated implants. Studies that propose to analyze the peri-implant bone alterations can contribute to a better understanding and clinical control of this phenomenon. This study analyzed the possible alterations of alveolar bone crest level on the vestibular and palatal plates after Straumann Bone Level SLActiveu00ae implants placed in posterior maxilla. This study used CBCT images of the perimplantar bone level, buccal and palatal, analyzed at two different times (T0: immediately after implant placement and T1: 90 days after implant placement), the changes were measured and analyzed statistically. There were no statistically significant differences in bone crest level between T0 and T1, both on the buccal and palatal sides (p

Download or read book Diagnostic Imaging for Dental Implant Therapy written by Joseph Steele and published by GRIN Verlag. This book was released on 2016-04-28 with total page 97 pages. Available in PDF, EPUB and Kindle. Book excerpt: Master's Thesis from the year 1990 in the subject Medicine - Dentistry, grade: A 3.444 GPA, University of Louisville (University of Louisville Graduate School), course: Master of Science Oral Biology, language: English, abstract: When planning osseointegrated implant therapy, radiological mapping of the prosthesis site is important to detail bone dimensions and quality, and to locate anatomic structures. Diagnostic imaging techniques for treatment planning in endosseous implant therapy were analyzed for dimensional accuracy. Modified mandibular symphysis was the most accurate occlusal survey (mean percent of error = 24.73), followed by the mandibular symphysis (mean percent error = 30.43) and the cross-sectional technique (mean percent error = 41.27). The interforaminal width (mental foramen) of the pantomograph can be accurately corrected using pre-exposure intraoral diagnostic wire and the formula: Distortion factor = Radiographic length of wire / Actual length of wire Linear tomography (Quint Sectograph) was used to diagnose the cross-sectional anatomy of the maxilla and mandible. The circumferential morphology of the tomograph correlated well with the dissected anatomy. Magnification percentage (13.11 height) was slightly higher than the manufacturer's recommendations. The loss of teeth and their subsequent replacement has been a perplexing problem in dentistry. Many patients think the loss of teeth is a consequence of aging. In fact, some patients wish to have their teeth removed and replaced with "good dentures." However, dentures are not a replacement for teeth but rather a substitute for no teeth. Dentists have long realized the benefits of retaining teeth for anchorage of removable or fixed partial dentures and will go to great lengths to save these potential abutments. Therefore, it would naturally follow that in the absence of natural anchorage one would look for an anchor¬age substitute, hence, the evolution of dental implantology.

Download or read book Dental Applications of Computerized Tomography written by Stephen L. G. Rothman and published by Quintessence Publishing (IL). This book was released on 1998 with total page 266 pages. Available in PDF, EPUB and Kindle. Book excerpt: Atlas/manual, for the radiologist and dental surgeon, on the performance and interpretation of dental CT. Abundant halftone and full-color photographs, scans, and images are included.

Download or read book Maxillofacial Cone Beam Computed Tomography written by William C. Scarfe and published by Springer. This book was released on 2018-01-04 with total page 1241 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book provides a comprehensive description of the fundamental operational principles, technical details of acquiring and specific clinical applications of dental and maxillofacial cone beam computed tomography (CBCT). It covers all clinical considerations necessary for optimal performance in a dental setting. In addition overall and region specific correlative imaging anatomy of the maxillofacial region is described in detail with emphasis on relevant disease. Finally imaging interpretation of CBCT images is presented related to specific clinical applications. This book is the definitive resource for all who refer, perform, interpret or use dental and maxillofacial CBCT including dental clinicians and specialists, radiographers, ENT physicians, head and neck, and oral and maxillofacial radiologists.

Download or read book Anatomic Proportions of Alveolar Bone U2014A Radiographic Study Using Cone Beam Computed Tomography written by Paula Lopez Jarana and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Introduction: Currently, the correct study of the alveolar bone morphology crucial and important factor in immediate implants . Since the introduction of the cone beam tomography (CBCT) it has developed into an essential diagnosis exam for adequate treatment planning, while also being a useful complementary exam due to the amount of data that a three-dimensional image provides to the dental clinician.Objective: to examine CBCT images by measuring four bone morphologic characteristics around maxillary teeth.Materials and methods:The present retrospective study included CBCTs (Planmeca ProMax 3D) obtained using a spiral technique with 0,2 mm thickness (200 mm field of view (FOV), 90 kV, 10 mAs, 1 mm pass) from patients referred to the department Of Periodontology of the Dental School of Seville (Spain) from January to December 2014. The size of the sample are 49 CBCT, with 208 teeth, 19 men and 30 women with an age range of 40,3 years (22-71). Radiographic image analysis or CBCT evaluation: Three calibrated examiners made distinct measurements of the bone relative to the tooth in question.. Data was reconstructed with an DICOM image.Parameters:1. The thickness of the facial bone wall was measured in a sagittal slice, perpendicular to the long axis of the root at several heights:A: thickness at the coronal part of the facial crestB: thickness at 4 mm from the coronal facial crestC: thickness at the apex from the apical constriction to facial wall D: the palatal thickness perpendicular to the coronal crest, near to buccal point A.2. Apical anchorage: a line from the most coronal point where implant bone preparation would start up to an anatomical (bone partitions, nerve paths ...) that is perpendicular to the bisector of the remaining alveolus.3. Alveolus width: a line from the vestibular crest to the palatal crest in the coronal portion, closest to the LAC.4. Differences from the palatal height with respect to the vestibular: once traced the axial axis of the tooth, a perpendicular line that passes through the vestibular crest is drawn. The distance between the perpendicular line and the ridge on the palatine is measured by drawing a line that is in turn, parallel to the axial axis of the tooth.Results and Discussion:In the upper jaw, the 89,4% of incisors, the 93.94% of canines, 78% of premolars and 70,5% of molars had a thickness inferior to the ideal 2 mm of buccal alveolar process as in other studies like Huynh-Ba 2010. Recent studies of the alveolar width by Zang 2015, found similar results for central incisors, lateral and canines (9,55-8,30-9,62). Our mean values are between 7,8-11,9 from incisor to molars. In the Nishihara et al 2017 study they find mean values of 9,4 u00b1 1,1mm for 1u00ba PM and 11,0 u00b1 0,6mm for 2u00ba PM. The anterior zone is the best place to insert a immediate implant in terms of apical anchorage, while the mean values of buccal thickness advice against these locations. The difference between vestibular and palatal crest tends to increase in premolars and molars sites, this means, from a clinical perspective, that the implant can be exposed during healing if it was not submerged at least 1-2 mm. The thickness of the palatal bone in mean values are higher than in vestibular, so this seems to be an ideal zone to achieve stability and insertion torque when placing an immediate implant.Conclusions:The alveolar bone thickness of the buccal plate was observed as thinner than 2 mm in the upper jaw, but only in canines for the palatal plate. Apical anchorage for immediate implant could be possible in anterior teeth. The mean values of alveolar width increase from anterior to posterior teeth.

Download or read book Cone Beam Computed Tomography written by Prashant P Jaju and published by JP Medical Ltd. This book was released on 2015-05-10 with total page 133 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cone Beam Computed Tomography is an imaging technique in which x-rays diverge to form a cone. Cone Beam Computed Tomography: A Clinician’s Guide to 3D Imaging is a concise, highly illustrated manual on this increasingly important form of imaging in dentistry. Divided into twelve chapters, the book begins with a history of Cone Beam Computed Tomography, followed by chapters on the physics and apparatus of CBCT and the need for CBCT in dentistry. Further chapters cover the role of CBCT in specific sub-specialties of dentistry, and a glossary provides an explanation of CBCT terminology. The role of CBCT in prosthodontics, orthodontics and airway analysis, endodontics and caries diagnosis, oral and maxillofacial pathologies, periodontal disease and forensic odontology, is described in detail. This book also brings the reader up to date on possible future applications of CBCT in dentistry. Cone Beam Computed Tomography: A Clinician’s Guide to 3D Imaging includes 180 full colour images and illustrations, further enhancing this invaluable resource for dentists. Key Points Concise guide to 3D imaging in dentistry Includes a history and basics of CBCT, as well as the role of CBCT in various dentistry sub-specialties 189 full colour images and illustrations

Download or read book Clinical Efficacy of Cross Sectional Imaging Compared with Panoramic Imaging and Virtual 3D Models for the Assessment of Dental Implant Placement written by Moiz Ahmad Khan and published by . This book was released on 2014 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt: Introduction: This study compared the clinical efficacy of panoramic imaging and Cone Beam Computed Tomography (CBCT) in the optimal placement of virtual dental implants in the posterior edentulous bounded regions of the jaws. Material and methods: From a retrospective audit of patient records, fifty-two subjects were recruited with sixty-one dental implant sites in the maxilla and mandible. Physical measurements of the residual alveolar ridge were performed and consensus decisions of optimal implant length and bone graft necessity were obtained using reformatted panoramic alone (RP) or cross-sectional imaging (XS). Results: Horizontal restorative space measurements greater for RP (p=0.001). Shorter implants were chosen more often using CS than RP. Use of XS allowed planning that reduced the need for bone graft procedures by 50%. Conclusion: The use of cross-sectional imaging provides supplemental information that significantly influences virtual implant position and the need for bone grafting.

Download or read book Facial Alveolar Bone Wall Width written by Ahmed Khaled Ahmed Abdin Zekry and published by . This book was released on 2017-01-26 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation, "Facial Alveolar Bone Wall Width: a Cone Beam Computed Tomography (CBCT) Study in Asians" by Ahmed Khaled Ahmed Abdin, Zekry, was obtained from The University of Hong Kong (Pokfulam, Hong Kong) and is being sold pursuant to Creative Commons: Attribution 3.0 Hong Kong License. The content of this dissertation has not been altered in any way. We have altered the formatting in order to facilitate the ease of printing and reading of the dissertation. All rights not granted by the above license are retained by the author. Abstract: Background: The width of the facial alveolar bone wall is crucial for long term successful esthetic outcomes of implants immediately placed into extraction sockets. A threshold of 2 mm is recommended to minimize buccal vertical bone resorption. Aim: To assess the width of the facial alveolar bone wall using cone-beam computed tomography images (CBCT). Methods: Retrospective CBCT images were acquired from a representative sample of Asians using the i-CAT(R) classic system with a 0.4 mm voxel size. At random, 200 CBCT images were selected according to predefined criteria. The DICOM file was imported into the i-Cat Vision(R) software. In the panoramic screen, the middle of each tooth was selected and, in the sagittal window, the middle cross section was selected for performing the measurements using a computer. The vertical distance from the alveolar crest (BC) - CEJ was measured. The width of the facial alveolar bone wall was measured at three locations: 1, 3, and 5 mm apical to BC. Descriptive statistics, frequency analyses, and multi-level comparisons were performed. Results: The sample consisted of 74 males and 126 females (mean age of 37.2 years; range 17-82 years). A total of 3618 teeth were assessed. There was no significant difference between the values of right and left sides, or between genders. However, statistically significant differences were observed between age groups at all levels. The distance from CEJ-BC varied from 0.4 to 4mm, with an overall tendency to increase with age. The mean width of the facial alveolar bone wall at anterior teeth was 0.9 mm and increased towards posterior regions. Rarely, a width of 2 mm was yielded (0.6-1.8 % for anterior teeth, 0.7- 30.8 % for posterior teeth). At a 5mm distance from BC, minimal widths of facial alveolar bone were identified for the anterior teeth. The frequency of dehiscence ranged from 9.9- 51.6 % for anterior and 3.1- 53.6 % for posterior teeth, respectively. Conclusion and clinical implications: A thin facial alveolar bone wall was usually present in both jaws. Hence, for most patients, adjunctive bone augmentation may be needed when installing implants in areas of esthetic concern. DOI: 10.5353/th_b4839566 Subjects: Facial bones - Tomography Teeth - Tomography

Download or read book Conventional Spiral and Low dose Computed Mandibular Tomography in Dental Implant Planning written by Annika Ekestubbe and published by . This book was released on 1999 with total page 82 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Cone Beam Computed Tomographic Simulation of Panoramic Radiology written by Ryan L. Snyder and published by . This book was released on 2007 with total page 324 pages. Available in PDF, EPUB and Kindle. Book excerpt: The aim of the research is to determine if cone beam computerized tomography reconstructed panoramic radiography viewed in two different focal trough shapes, and three different focal trough widths changes the ability to identify high risk radiologic signs associated with an intimate anatomic relationship between third molars and the Inferior Alveolar Nerve. The basic assumption of this research is that a customized focal trough shape with a wider focal trough width at the third molar region will produce more high risk radiologic signs present when there is a relation between the third molar and the Inferior Alveolar Canal. A retrospective sample of 50 mandibular third molar teeth being less than 3mm from the Inferior Alveolar Canal were picked from the files of the i-CAT CBVCT here at the University of Louisville Radiology Department. The 50 teeth were reconstructed into panoramic images with two different arch shapes (customized and average form), and three different focal trough widths at the third molar region (10, 20, and 40mm). Six high risk radiological panoramic signs of the third molar related to the Mandibular canal will be evaluated at each tooth and determined to be present or absent by two independent observers. Each observer will also utilize the CBVCT cross sectional analysis of the mandible, measure the distance in mm, the mandibular canal to the closest part of the mandibular third molar tooth. With these observations we will be able to determine the presence or absence of the high risk radiological signs and actually see if the teeth that have the high risk radiological signs are associated with the Inferior Alveolar Nerve, related to the focal trough image layer widths. This analysis will be compared in the two focal trough image layer shapes to determine if a average form of dentition focal trough shape will present more radiographic markers than the customized focal trough shape. A Ordinal Logistic Regression will be performed to evaluate the relative impact of the predictor variables (radiographic signs, arch forms, and focal trough widths) to the outcome variables (distance of tooth to nerve-groups). Descriptive analysis will also be performed on each tooth to describe the comparison of radiological signs present, group that each tooth falls in related to distance of mandibular nerve in mm to the root of the third molar, whether nerve is buccal, lingual, or central to the root of the tooth, and if the nerve runs through the root, or the root is notched by the nerve. For all tooth images, radiographic signs will be determined whether they are present or absent using two observers as independent experts to determine accuracy. Ordinal logistic regression analysis will be used to measure the outcome of radiographic signs present with three categories (Cat. 1, 0-1mm, Cat. 2, 1.001-2mm, Cat. 3, 2+mm). Intraclass correlation coefficient will be used as a measure of agreement to measure both inter and intra rater variability. With respect to intra-observer variability, inter-observer variability, there were significant differences in intra-observer and inter-observer variability.