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https://www.readbyqxmd.com/read/27909868/dental-age-estimation-in-the-living-after-completion-of-third-molar-mineralization-new-data-for-gustafson-s-criteria
#1
M Timme, W H Timme, A Olze, C Ottow, S Ribbecke, H Pfeiffer, R Dettmeyer, A Schmeling
There is a need for dental age estimation methods after completion of the third molar mineralization. Degenerative dental characteristics appear to be suitable for forensic age diagnostics beyond the 18th year of life. In 2012, Olze et al. investigated the criteria studied by Gustafson using orthopantomograms. The objective of this study was to prove the applicability and reliability of this method with a large cohort and a wide age range, including older individuals. For this purpose, 2346 orthopantomograms of 1167 female and 1179 male Germans aged 15 to 70 years were reviewed...
December 1, 2016: International Journal of Legal Medicine
https://www.readbyqxmd.com/read/27907980/flipped-clinical-training-a-structured-training-method-for-undergraduates-in-complete-denture-prosthesis
#2
Anbarasi K, Kasim Mohamed K, Phagalvarthy Vijayaraghavan, Deivanayagam Kandaswamy
PURPOSE: To design and implement flipped clinical training for undergraduate dental students in removable complete denture treatment and predict its effectiveness by comparing the assessment results of students trained by flipped and traditional methods. METHODS: Flipped training was designed by shifting the learning from clinics to learning center (phase I) and by preserving the practice in clinics (phase II). In phase I, student-faculty interactive session was arranged to recap prior knowledge...
December 2016: Korean Journal of Medical Education
https://www.readbyqxmd.com/read/27890318/the-mandibular-molar-pit-tubercle-mmpt-dental-nonmetric-trait-comprehensive-analysis-of-a-large-sample
#3
Luís Miguel Marado, Ana Maria Silva
Dental nonmetric traits are quasicontinous variables, mostly of genetic origin. Thus, sets of such traits allow biological distance estimation between samples. Mandibular molar pit-tubercle (MMPT) is a buccal trait defined by Weets (2009) in Irish samples. This study aims to analyze (a) trait frequencies, (b) grade definitions, (c) intraobserver error, (d) sexual dimorphism, (e) asymmetry, and (f) trait associations for MMPT in a Portuguese sample. The first (LM1), second (LM2) and third (LM3) lower molars of 600 identified individuals from the Coimbra collections were scored for MMPT in three scoring sessions...
September 20, 2016: Homo: Internationale Zeitschrift Für die Vergleichende Forschung Am Menschen
https://www.readbyqxmd.com/read/27883287/definition-classification-and-retrospective-analysis-of-photostimulable-phosphor-image-artefacts-and-errors-in-intraoral-dental-radiography
#4
Armagan Caliskan, Ayse Pinar Sumer
OBJECTIVES: To detect and determine image error and artefact types in intraoral radiographs obtained with PSP technology, place them in an appropriate classification and retrospectively analyse the PSP specific image errors and artefacts. The causes and solutions of PSP specific errors and artefacts have also been discussed. METHODS: The radiographic database of the Ondokuz Mayıs University, Faculty of Dentistry, Department of Dentomaxillofacial Radiology was used for this study...
November 24, 2016: Dento Maxillo Facial Radiology
https://www.readbyqxmd.com/read/27866699/recording-the-trajectory-of-mouth-opening-and-closing-for-the-fabrication-of-an-occlusal-splint
#5
Jong-Eun Kim, Joo Hyun Kwon, Jee-Hwan Kim, June-Sung Shim
Various attempts have been made to transfer the transverse hinge axis and mandibular movement pattern to the mechanical articulator and to fabricate dental prostheses with the fewest errors. However, the occlusal adjustment of a dental prosthesis is always necessary to ensure a precise intraoral fit even when the facebow transfer technique is used in the cast mounting procedure. This is because the true hinge axis is not obtained when the facebow is applied to a patient who exhibits a variable mandible movement pattern rather than a single rotational axis...
November 17, 2016: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/27861137/computer-assisted-system-on-mandibular-canal-detection
#6
Da-Chuan Cheng, Li-Wei Chen, Yen-Wen Shen, Lih-Jyh Fuh
BACKGROUND: A dentist always checks a patient by using panoramic radiography (PR) initially. The measurement of the minimal distance (MD) between the alveolar crest and the mandibular canal (MC) superior border is critically important before the dental implant surgery, extraction of 3rd molar teeth or any surgery in the posterior area of minimal distance (MD). However, the image of MC is not always clear to identify. OBJECTIVE: A software is needed for training dentists as well as a tool of demonstration to patients in clinics precisely and quickly...
November 18, 2016: Biomedizinische Technik. Biomedical Engineering
https://www.readbyqxmd.com/read/27859228/testing-a-novel-3d-printed-radiographic-imaging-device-for-use-in-forensic-odontology
#7
Tara L Newcomb, Ann M Bruhn, Bridget Giles, Hector M Garcia, Norou Diawara
There are specific challenges related to forensic dental radiology and difficulties in aligning X-ray equipment to teeth of interest. Researchers used 3D printing to create a new device, the combined holding and aiming device (CHAD), to address the positioning limitations of current dental X-ray devices. Participants (N = 24) used the CHAD, soft dental wax, and a modified external aiming device (MEAD) to determine device preference, radiographer's efficiency, and technique errors. Each participant exposed six X-rays per device for a total of 432 X-rays scored...
November 10, 2016: Journal of Forensic Sciences
https://www.readbyqxmd.com/read/27848202/prevalence-of-enamel-defects-and-association-with-dental-caries-in-preschool-children
#8
C Massignan, M Ximenes, C da Silva Pereira, L Dias, M Bolan, M Cardoso
AIM: This was to evaluate the prevalence of the developmental defects of enamel (DDE) in primary teeth and its association with dental caries. METHODS: A cross-sectional study with a randomised representative sample was carried out with 1101 children aged 2-5 years enrolled in public preschools (50% prevalence of DDE in primary teeth, a standard error of 3%, and a confidence level of 95%). Three calibrated dentists (K > 0.62) performed clinical examination...
November 15, 2016: European Archives of Paediatric Dentistry: Official Journal of the European Academy of Paediatric Dentistry
https://www.readbyqxmd.com/read/27833792/effects-of-co2-laser-irradiation-on-matrix-rich-biofilm-development-formation-an-in-vitro-study
#9
Bruna Raquel Zancopé, Vanessa B Dainezi, Marinês Nobre-Dos-Santos, Sillas Duarte, Vanessa Pardi, Ramiro M Murata
BACKGROUND: A carbon dioxide (CO2) laser has been used to morphologically and chemically modify the dental enamel surface as well as to make it more resistant to demineralization. Despite a variety of experiments demonstrating the inhibitory effect of a CO2 laser in reduce enamel demineralization, little is known about the effect of surface irradiated on bacterial growth. Thus, this in vitro study was preformed to evaluate the biofilm formation on enamel previously irradiated with a CO2 laser (λ = 10...
2016: PeerJ
https://www.readbyqxmd.com/read/27833341/minimizing-relapse-in-mandibular-asymmetry-correction-by-bssro-with-intentional-osteotomy-of-distal-segment-a-prospective-study
#10
R Vimalraj, N Jayakumar, K George Varghese, S Mohan, Bobby John, Somil Chhag
INTRODUCTION: Surgical correction of the patients with mandibular asymmetry by bilateral sagittal split ramus osteotomy (BSSRO) creats remarkable results in the immediate post operative period, but it carries a high risk of relapse by powerful muscle forces and the osteotomized segments. To minimize this risk, literatures highlight the procedure of an intentional osteotomy and stripping of muscles. A prospective study was conducted in Government Dental College, Kottayam, Kerala, to assess the effect of intentional osteotomy of posterior part of distal segment and stripping of medial pterygoid muscle on the proximal segment on affected side in mandibular asymmetry patients treated with BSSRO...
December 2016: Journal of Maxillofacial and Oral Surgery
https://www.readbyqxmd.com/read/27829760/faulty-radiographs-a-cross-sectional-analysis-among-dental-college-students-in-namakkal-district-tamil-nadu-india
#11
S Elangovan, M Nazargi Mahabob, Suman Jaishankar, B Senthil Kumar, Deepika Rajendran
AIM: The aim of this study was to assess the ability of taking and processing of intraoral periapical radiographs (IOPA) by the dental college undergraduate students and also to evaluate the impact of teaching on their skills. MATERIALS AND METHODS: This study was conducted in the OMRD department. Final year students (52) and interns (41) of 2014 were included in this study. In this 1 year study, 13104 IOPAs were taken and manually processed by these students. These radiographs were evaluated by two senior faculties of the department separately...
October 2016: Journal of Pharmacy & Bioallied Sciences
https://www.readbyqxmd.com/read/27825336/dental-age-assessment-in-6-to-14-year-old-german-children-comparison-of-cameriere-and-demirjian-methods
#12
Thomas Gerhard Wolf, Benjamín Briseño-Marroquín, Angelika Callaway, Michael Patyna, Victor Thomas Müller, Ines Willershausen, Vicky Ehlers, Brita Willershausen
BACKGROUND: The aim of the study was to compare two frequently used dental age estimation methods for accuracy. METHODS: A total of 479 panoramic radiographs in age groups 6-14 years from a German population were evaluated. The dental age of 268 boys and 211 girls was assessed by means of the method of Demirjian (1973) and Cameriere (2006) and compared with their actual chronological age. RESULTS: Demirjan's method showed an overestimation of dental age compared to chronological age in all age groups for boys (mean difference -0...
November 8, 2016: BMC Oral Health
https://www.readbyqxmd.com/read/27791216/dental-enamel-defects-in-german-medieval-and-early-modern-age-populations
#13
Joanna Nieczuja-Dwojacka, Joanna Grzelak, Piotr Kiełtyk
Introduction: The aim of the present longitudinal study was to compare short-term growth in height, the circumference of the head, chest, and hips, biacromial width, as well as bi-iliac breadth in one infant, two preschool children, and seven adolescent girls. Methods: The studied characteristics were measured four times a week. Stature was observed during 83-130 days and the other measures during 60 days. Intra-observer technical error was calculated (TEM), and smoothing techniques using combined repeated median/median hybrid filter (CRMMH) were applied...
October 28, 2016: Anthropologischer Anzeiger; Bericht über die Biologisch-anthropologische Literatur
https://www.readbyqxmd.com/read/27757575/new-models-for-age-estimation-and-assessment-of-their-accuracy-using-developing-mandibular-third-molar-teeth-in-a-thai-population
#14
P Duangto, A Iamaroon, S Prasitwattanaseree, P Mahakkanukrauh, A Janhom
Age estimation using developing third molar teeth is considered an important and accurate technique for both clinical and forensic practices. The aims of this study were to establish population-specific reference data, to develop age prediction models using mandibular third molar development, to test the accuracy of the resulting models, and to find the probability of persons being at the age thresholds of legal relevance in a Thai population. A total of 1867 digital panoramic radiographs of Thai individuals aged between 8 and 23 years was selected to assess dental age...
October 18, 2016: International Journal of Legal Medicine
https://www.readbyqxmd.com/read/27747636/effect-of-bite-force-in-occlusal-adjustment-of-dental-implants-on-the-distribution-of-occlusal-pressure-comparison-among-three-bite-forces-in-occlusal-adjustment
#15
Sho Kayumi, Yoshiyuki Takayama, Atsuro Yokoyama, Nana Ueda
BACKGROUND: The purpose of this study was to investigate the influence of occlusal forces (the contractile force of masticatory muscles) exerted during occlusal adjustment on the distribution of the forces among teeth, implants, and temporomandibular joints (TMJs) in intercuspal clenching in cases with bilateral missing molars and premolars by using finite element analysis. METHODS: A three-dimensional finite element model of the mandible with eight implants in the premolar and molar regions was constructed...
December 2015: International Journal of Implant Dentistry
https://www.readbyqxmd.com/read/27746602/knowledge-attitude-and-practice-of-dental-professionals-regarding-the-effect-and-management-of-food-impaction-associated-with-fixed-partial-denture-prostheses-a-survey
#16
Aradhana Nagarsekar, Ridhima Gaunkar, Meena Aras
OBJECTIVE: This survey was undertaken to assess dentist's opinion regarding the occurrence and pattern of food impaction in relation to fixed partial denture (FPD) prostheses, its commonly observed consequences, factors contributing to it, and its management. METHODS: A descriptive survey was conducted on a sample size of 150 dental practitioners. The pro forma consisted of informed consent, demographic information, and questionnaire. The results were tallied and quantitative analysis was performed to obtain the descriptive statistics for the data using SPSS version 20...
October 2016: Journal of Indian Prosthodontic Society
https://www.readbyqxmd.com/read/27734089/efficacy-of-a-new-sealant-to-prevent-white-spot-lesions-during-fixed-orthodontic-treatment-a-12-month-single-center-randomized-controlled-clinical-trial
#17
Shaza M Hammad, Michael Knösel
BACKGROUND AND OBJECTIVE: White spot lesions (WSLs) are an undesirable side effect of fixed orthodontic appliance therapy and are reported to occur in 2-96 % of orthodontic patients. In this study, the efficacy of a new sealant to prevent WSLs during fixed orthodontic treatment was compared to a control group that did not receive sealant. PATIENTS AND METHODS: For this 2-arm parallel-group randomized trial, 50 subjects aged 12-18 years (mean age 14.57 ± 2...
October 12, 2016: Journal of Orofacial Orthopedics, Fortschritte der Kieferorthopädie
https://www.readbyqxmd.com/read/27723188/the-conometric-concept-definitive-fixed-lithium-disilicate-restorations-supported-by-conical-abutments
#18
Marco Degidi, Diego Nardi, Gianluca Sighinolfi, Adriano Piattelli
PURPOSE: The use of the conical coupling connection to support definitive restorations was evaluated in cases involving full acrylic resin or hybrid acrylic resin-composite prostheses. The aim of this study was to evaluate the performance of definitive fixed partial prostheses made with lithium disilicate and supported by coupling connection abutments and healed implants. MATERIALS AND METHODS: The prostheses were placed in the posterior regions of partially edentulous patients; 65 patients received fixed lithium disilicate restorations splinted with conical coupling connections to two implants...
October 10, 2016: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
https://www.readbyqxmd.com/read/27713054/improving-the-accuracy-of-mandibular-reconstruction-with-vascularized-iliac-crest-flap-role-of-computer-assisted-techniques
#19
Wen-Bo Zhang, Yao Yu, Yang Wang, Chi Mao, Xiao-Jing Liu, Chuan-Bin Guo, Guang-Yan Yu, Xin Peng
While vascularized iliac crest flap is widely used for mandibular reconstruction, it is often challenging to predict the clinical outcome in a conventional operation based solely on the surgeon's experience. Herein, we aimed to improve this procedure by using computer-assisted techniques. We retrospectively reviewed records of 45 patients with mandibular tumor who underwent mandibulectomy and reconstruction with vascularized iliac crest flap from January 2008 to June 2015. Computer-assisted techniques including virtual plan, stereomodel, pre-bending individual reconstruction plate, and surgical navigation were used in 15 patients...
November 2016: Journal of Cranio-maxillo-facial Surgery
https://www.readbyqxmd.com/read/27694297/quality-of-impressions-and-work-authorizations-submitted-by-dental-students-supervised-by-prosthodontists-and-general-dentists
#20
Terence A Imbery, Nicholas Diaz, Kristy Greenfield, Charles Janus, Al M Best
Preclinical fixed prosthodontics is taught by Department of Prosthodontics faculty members at Virginia Commonwealth University School of Dentistry; however, 86% of all clinical cases in academic year 2012 were staffed by faculty members from the Department of General Practice. The aims of this retrospective study were to quantify the quality of impressions, accuracy of laboratory work authorizations, and most common errors and to determine if there were differences between the rate of errors in cases supervised by the prosthodontists and the general dentists...
October 2016: Journal of Dental Education
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