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https://www.readbyqxmd.com/read/29791686/extruded-upper-first-molar-intrusion-comparison-between-unilateral-and-bilateral-miniscrew-anchorage
#1
Mari Miura Sugii, Bruno de Castro Ferreira Barreto, Waldemir Francisco Vieira-Júnior, Katia Regina Izola Simone, Ataís Bacchi, Ricardo Armini Caldas
OBJECTIVE: The aim of his study was to evaluate the stress on tooth and alveolar bone caused by orthodontic intrusion forces in a supraerupted upper molar, by using a three-dimensional Finite Element Method (FEM). METHODS: A superior maxillary segment was modeled in the software SolidWorks 2010 (SolidWorks Corporation, Waltham, MA, USA) containing: cortical and cancellous bone, supraerupted first molar, periodontal tissue and orthodontic components. A finite element model has simulated intrusion forces of 4N onto a tooth, directed to different mini-screw locations...
January 2018: Dental Press Journal of Orthodontics
https://www.readbyqxmd.com/read/29780742/caries-risk-assessment-of-12-13-year-old-government-and-private-school-going-children-of-mysore-city-using-cariogram-a-comparative-study
#2
Sandhya P Naik, Shabna Moyin, Bhakti Patel, Lata Prabhu Warad, Sameer Punathil, C B Sudeep
Aim: The aim of this study is to assess the caries risk assessment of 12-13-year-old government and private school going children of Mysore city using Cariogram. Materials and Methods: A cross-sectional examination was carried out on a total of 104 government and private schoolchildren aged 12-13 years. Ten factors from the Cariogram software(D Bratthall, Computer software, Malmo, Sweden) were included from study participant's records to complete the Cariogram. The percentage of "chances of avoiding new lesions" (caries risk) among government and private school study participants were obtained from Cariogram, and the participants were classified into five risk groups...
March 2018: Journal of International Society of Preventive & Community Dentistry
https://www.readbyqxmd.com/read/29779276/-fabrication-and-accuracy-research-on-3d-printing-dental-model-based-on-cone-beam-computed-tomography-digital-modeling
#3
Hui-Rong Zhang, Le-Feng Yin, Yan-Li Liu, Li-Yi Yan, Ning Wang, Gang Liu, Xiao-Li An, Bin Liu
OBJECTIVE: The aim of this study is to build a digital dental model with cone beam computed tomography (CBCT), to fabricate a virtual model via 3D printing, and to determine the accuracy of 3D printing dental model by comparing the result with a traditional dental cast. METHODS: CBCT of orthodontic patients was obtained to build a digital dental model by using Mimics 10.01 and Geomagic studio software. The 3D virtual models were fabricated via fused deposition modeling technique (FDM)...
April 1, 2018: Hua Xi Kou Qiang Yi Xue za Zhi, Huaxi Kouqiang Yixue Zazhi, West China Journal of Stomatology
https://www.readbyqxmd.com/read/29779218/an-analysis-of-the-timing-and-materials-associated-with-pulp-disease-following-restorative-dental-treatment
#4
J B Yong, S Sivarajan, P V Abbott
AIM: To assess whether the timing of pulp disease after tooth restoration was associated with type of restorative dental material used, extent of the restoration, or tooth type. METHODOLOGY: A comprehensive search and analysis of data using the Titanium Oral Health Management software program at The Oral Health Centre of Western Australia was performed to correlate procedural codes for teeth that had restorations placed and subsequently developed pulp disease requiring endodontic treatment or extraction from 1st January 2009 to 31st December 2013...
May 19, 2018: International Endodontic Journal
https://www.readbyqxmd.com/read/29769767/a-comparative-study-on-the-stress-distribution-around-dental-implants-in-three-arch-form-models-for-replacing-six-implants-using-finite-element-analysis
#5
Maryam Zarei, Mahmoud Jahangirnezhad, Hojatollah Yousefimanesh, Maryam Robati, Hossein Robati
Background: Dental implant is a method to replacement of missing teeth. It is important for replacing the missed anterior teeth. In vitro method is a safe method for evaluation of stress distribution. Finite element analysis as an in vitro method evaluated stress distribution around replacement of six maxillary anterior teeth implants in three models of maxillary arch. Materials and Methods: In this in vitro study, using ABAQUS software (Simulia Corporation, Vélizy-Villacoublay, France), implant simulation was performed for reconstruction of six maxillary anterior teeth in three models...
March 2018: Journal of Indian Society of Periodontology
https://www.readbyqxmd.com/read/29761846/stability-of-tapered-and-parallel-walled-dental-implants-a-systematic-review-and-meta-analysis
#6
REVIEW
Momen A Atieh, Nabeel Alsabeeha, Warwick J Duncan
BACKGROUND: Clinical trials have suggested that dental implants with a tapered configuration have improved stability at placement, allowing immediate placement and/or loading. The aim of this systematic review and meta-analysis was to evaluate the implant stability of tapered dental implants compared to standard parallel-walled dental implants. MATERIALS AND METHODS: Applying the guidelines of Preferred Reporting Items for Systematic Reviews and Meta-analyses (PRISMA) statement, randomized controlled trials (RCTs) were searched for in electronic databases and complemented by hand searching...
May 15, 2018: Clinical Implant Dentistry and related Research
https://www.readbyqxmd.com/read/29759350/poor-oral-health-in-patients-with-schizophrenia-a-systematic-review-and-meta-analysis
#7
REVIEW
Mi Yang, Peng Chen, Man-Xi He, Min Lu, Hong-Ming Wang, Jair C Soares, Xiang-Yang Zhang
Increased rates of comorbid physical illness have been commonly reported in patients with schizophrenia. However, there are fewer data on dental disease in these patients. We systematically evaluated existing data on the oral health survey of schizophrenia patients through meta-analysis. Using the available databases, we performed a systematic search to identify the studies examining the oral health in schizophrenia patients from January 1997 to June 2017, based on the inclusion and exclusion criteria. Two investigators extracted the related data independently...
May 11, 2018: Schizophrenia Research
https://www.readbyqxmd.com/read/29754856/three-dimensional-dental-and-craniofacial-manifestations-in-patients-with-late-diagnosis-of-mucopolysaccharidosis-type-ii-report-of-2-cases
#8
Rafaela de Oliveira Torres, Andréa Vaz Braga Pintor, Fábio Ribeiro Guedes, Lucia Helena Soares Cevidanes, Liana Bastos Freitas-Fernandes, Antônio Carlos de Oliveira Ruellas, Ivete Pomarico Ribeiro de Souza
The objective of this study was to report the clinical evaluation results and 3-dimensional (3-D) dental and craniofacial characteristics observed in 2 male patients with mucopolysaccharidosis type II. The patients were evaluated clinically (soft tissue evaluation, evaluation of occlusion, periodontal and dental examinations) and by using craniofacial computed tomography, with evaluation of 3-D images in ITK-Snap v. 2.2 (Penn Image Computing and Science Laboratory, Philadelphia, PA; http://www.itksnap.org/) and 3-D Slicer (http://www...
April 16, 2018: Oral Surgery, Oral Medicine, Oral Pathology and Oral Radiology
https://www.readbyqxmd.com/read/29750097/relationship-between-resolution-and-accuracy-of-four-intraoral-scanners-in-complete-arch-impressions
#9
Priscilla Medina-Sotomayor, Agustín Pascual-Moscardó, Isabel Camps
Background: The scanner does not measure the dental surface continually. Instead, it generates a point cloud, and these points are then joined to form the scanned object. This approximation will depend on the number of points generated (resolution), which can lead to low accuracy (trueness and precision) when fewer points are obtained. The purpose of this study is to determine the resolution of four intraoral digital imaging systems and to demonstrate the relationship between accuracy and resolution of the intraoral scanner in impressions of a complete dental arch...
April 2018: Journal of Clinical and Experimental Dentistry
https://www.readbyqxmd.com/read/29748991/marginalized-zero-inflated-poisson-models-with-missing-covariates
#10
Habtamu K Benecha, John S Preisser, Kimon Divaris, Amy H Herring, Kalyan Das
Unlike zero-inflated Poisson regression, marginalized zero-inflated Poisson (MZIP) models for counts with excess zeros provide estimates with direct interpretations for the overall effects of covariates on the marginal mean. In the presence of missing covariates, MZIP and many other count data models are ordinarily fitted using complete case analysis methods due to lack of appropriate statistical methods and software. This article presents an estimation method for MZIP models with missing covariates. The method, which is applicable to other missing data problems, is illustrated and compared with complete case analysis by using simulations and dental data on the caries preventive effects of a school-based fluoride mouthrinse program...
May 11, 2018: Biometrical Journal. Biometrische Zeitschrift
https://www.readbyqxmd.com/read/29747592/qualitative-exploration-of-barriers-and-facilitators-of-dental-service-utilization-of-pregnant-women-a-triangulation-approach
#11
Hoda Bahramian, Simin Z Mohebbi, Mohammad Reza Khami, Rocio Beatriz Quinonez
BACKGROUND: Pregnant women are vulnerable to a wide range of oral health conditions that could be harmful to their own health and future child. Despite the usefulness of regular dental service utilization in prevention and early detection of oral diseases, it is notably low among pregnant women. In this qualitative study, we aimed to explore barriers and facilitators influencing pregnant women's dental service utilization. METHODS: Using a triangulation approach, we included pregnant women (n = 22) from two public health centers, midwives (n = 8) and dentists (n = 12) from 12 other public centers in Tehran (Iran)...
May 10, 2018: BMC Pregnancy and Childbirth
https://www.readbyqxmd.com/read/29739844/nursing-administrators-views-on-oral-health-in-long-term-care-facilities-an-exploratory-study
#12
Janelle Y Urata, Elizabeth T Couch, Margaret M Walsh, Dorothy J Rowe
Purpose: To explore the knowledge, attitudes, and practices of supervising nurse administrators (SNAs) regarding the oral care provided to long-term care facility (LTCF) residents and the role of dental professionals in those facilities. Methods: The investigators of this study partnered with the National Association of Nursing Administrators to send this cross-sectional study consisting of a 35-item electronic survey to its members whose email addresses were in their database. Online software tabulated responses and calculated frequencies (percentages) of responses for each survey item...
April 2018: Journal of Dental Hygiene: JDH
https://www.readbyqxmd.com/read/29733219/the-photoshop-smile-design-technique
#13
Edward A McLaren, Ronald E Goldstein
Esthetic or cosmetic dentistry has become one of the main areas of dental practice emphasis and growth for the past several decades. Many articles have been written and courses taught over the years on concepts of smile design to develop a treatment plan for an esthetic outcome for the patient. The beauty of digital smile design is that patients can see the potential esthetic outcomes of treatment options in minutes. While other dental processes would still need to be completed (ie, generating casts, testing vertical changes and esthetics with a mock-up, etc), using smile design software to visualize the end result is a way to get acceptance by the patient prior to starting the physical processes...
May 2018: Compendium of Continuing Education in Dentistry
https://www.readbyqxmd.com/read/29732310/three-dimensional-optimization-and-sensitivity-analysis-of-dental-implant-thread-parameters-using-finite-element-analysis
#14
Maryam Geramizadeh, Hamidreza Katoozian, Reza Amid, Mahdi Kadkhodazadeh
Objectives: This study aimed to optimize the thread depth and pitch of a recently designed dental implant to provide uniform stress distribution by means of a response surface optimization method available in finite element (FE) software. The sensitivity of simulation to different mechanical parameters was also evaluated. Materials and Methods: A three-dimensional model of a tapered dental implant with micro-threads in the upper area and V-shaped threads in the rest of the body was modeled and analyzed using finite element analysis (FEA)...
April 2018: Journal of the Korean Association of Oral and Maxillofacial Surgeons
https://www.readbyqxmd.com/read/29732299/three-dimensional-morphological-evaluation-of-the-hard-palate-in-korean-adults-with-mild-to-moderate-obstructive-sleep-apnea
#15
Chen Yu, Hyo-Won Ahn, Seong-Hun Kim
Objective: The purpose of this study was to evaluate differences in three-dimensional (3D) morphology of the hard palate between Korean adults with and without mild-to-moderate obstructive sleep apnea (OSA) using cone-beam computed tomographic (CBCT) data. Methods: The protocol for the two-dimensional (2D) and 3D mathematical modeling was established by analyzing CBCT images of 30 adults with OSA and 30 matched controls without OSA, using MIMICS software. The linear and angular measurements were also determined using this software...
May 2018: Korean Journal of Orthodontics
https://www.readbyqxmd.com/read/29729097/3d-printed-model-for-hands-on-training-in-dental-traumatology
#16
M Reymus, C Fotiadou, R Hickel, C Diegritz
AIM: To assess the feasibility of creating a realistic model for hands-on training in dental traumatology using 3D printing technology, and then to investigate the added value of working with the website dentaltraumaguide. org. METHODOLOGY: With the use of special software applications, a model was designed based on the CBCT of the maxilla of a real patient that imitated several traumatic dental injuries. The model was reproduced using a stereolithographic printer in order to use the specimens in a hands-on training course on dental traumatology for undergraduate students in their final year in the Department of Conservative Dentistry and Periodontology in Munich, Germany...
May 5, 2018: International Endodontic Journal
https://www.readbyqxmd.com/read/29724554/complete-arch-accuracy-of-intraoral-scanners
#17
Joshua C Treesh, Peter C Liacouras, Robert M Taft, Daniel I Brooks, Sorana Raiciulescu, Daniel O Ellert, Gerald T Grant, Ling Ye
STATEMENT OF PROBLEM: Intraoral scanners have shown varied results in complete-arch applications. PURPOSE: The purpose of this in vitro study was to evaluate the complete-arch accuracy of 4 intraoral scanners based on trueness and precision measurements compared with a known reference (trueness) and with each other (precision). MATERIAL AND METHODS: Four intraoral scanners were evaluated: CEREC Bluecam, CEREC Omnicam, TRIOS Color, and Carestream CS 3500...
April 30, 2018: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/29724547/an-investigation-of-the-esthetic-indicators-of-maxillary-anterior-teeth-in-young-turkish-people
#18
Hatice Özdemir, Merve Köseoğlu, Funda Bayindir
STATEMENT OF PROBLEM: Comprehensive studies evaluating the dimensions of anterior maxillary teeth in the Turkish population with respect to different esthetic parameters are lacking. PURPOSE: The purpose of this clinical study was to evaluate different proportions of teeth and compare them with current esthetic parameters such as the golden proportion, recurring esthetic dental proportion, and width-to-height ratio of central incisors and to evaluate whether the apparent contact dimension of maxillary anterior teeth follows the "50:40:30" rule...
April 30, 2018: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/29722937/a-novel-methodology-to-validate-the-accuracy-of-extraoral-dental-scanners-and-digital-articulation-systems
#19
A Ellakwa, S Elnajar, D Littlefair, G Sara
PURPOSE: The aim of the current study is to develop a novel method to investigate the accuracy of 3D scanners and digital articulation systems. MATERIALS AND METHODS: An upper and a lower poured stone model were created by taking impression of fully dentate male (fifty years old) participant. Titanium spheres were added to the models to allow for an easily recognisable geometric shape for measurement after scanning and digital articulation. Measurements were obtained using a Coordinate Measuring Machine to record volumetric error, articulation error and clinical effect error...
May 3, 2018: European Journal of Prosthodontics and Restorative Dentistry
https://www.readbyqxmd.com/read/29721227/accuracy-of-fit-of-implant-supported-bars-fabricated-on-definitive-casts-made-by-different-dental-stones
#20
Ioannis Kioleoglou, Argirios Pissiotis, Michalakis Konstantinos
Background: The purpose of this study was to evaluate the accuracy of fitting of an implant supported screw-retained bar made on definitive casts produced by 4 different dental stone products. Material and Methods: The dental stones tested were QuickRock (Protechno), FujiRock (GC), Jade Stone (Whip Mix) and Moldasynt (Heraeus). Three external hexagon implants were placed in a polyoxymethylene block. Definitive impressions were made using monophase high viscosity polyvinylsiloxane in combination with custom trays...
March 2018: Journal of Clinical and Experimental Dentistry
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