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https://www.readbyqxmd.com/read/29235202/three-dimensional-static-articulation-accuracy-of-virtual-models-part-i-system-trueness-and-precision
#1
Sophia Hui Xin Yee, Roxanna Jean Esguerra, Amelia Anya Qin'An Chew, Keng Mun Wong, Keson Beng Choon Tan
PURPOSE: To evaluate the 3D static articulation accuracy of 3 model scanner-CAD systems (Ceramill Map400 [AG], inEos X5 [SIR], Scanner S600 Arti [ZKN]) using a coordinate measuring machine (CMM). Trueness and precision for each system will be reported in Part I. MATERIALS AND METHODS: The master model simulated a single crown opposing a 3-unit fixed dental prosthesis. Five mounted stone cast sets were prepared, and one set was randomly selected. Reference values were obtained by measuring interarch and interocclusal reference features with the CMM...
December 13, 2017: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
https://www.readbyqxmd.com/read/29233259/the-in-vitro-and-in-vivo-reproducibility-of-a-video-based-digital-imaging-system-for-tooth-colour-measurement
#2
Wen Luo, Mojgan Naeeni, Suzanne Platten, Jinfang Wang, Jianing N Sun, Stephen Westland, Andrew Joiner
OBJECTIVES: To assess the robustness of a new custom built video-based digital imaging system (VDIS) for measuring tooth colour and whiteness under in vitro and in vivo conditions. METHODS: The VDIS imaging system was developed for tooth colour measurement and evaluated in vitro and in vivo. The in vitro validation used extracted human teeth (HT, n=14) stored in water and VITA Classical shade guide tabs (SG, n=16). These were measured by the VDIS at baseline, 5min, 2h, 1 week and 2 weeks to evaluate the system repeatability...
December 2017: Journal of Dentistry
https://www.readbyqxmd.com/read/29229076/the-use-of-3d-models-to-improve-sinus-augmentation-outcomes-a-case-report
#3
REVIEW
Selina H Somji, Agnetha Valladares, Sun Ho Kim, Yung Cheng Paul Yu, Stuart J Froum
Sinus augmentation is a predictable procedure that is often required when restoring the posterior maxilla with dental implants. Even with high success rates, careful pre-surgical planning is crucial. A 3D model is a valuable aid for the clinician as it allows for pre-operative simulation, which can reduce surgical time, reduce the risk of intra-operative complications and decrease the potential for error. The aim of this case report is to focus on how such a model is useful when undertaking a sinus augmentation procedure with simultaneous implant placement...
December 2017: Singapore Dental Journal
https://www.readbyqxmd.com/read/29226300/a-novel-method-for-treatment-of-class-iii-malocclusion-in-growing-patients
#4
Saad A Al-Mozany, Oyku Dalci, Mohammed Almuzian, Carmen Gonzalez, Nour E Tarraf, M Ali Darendeliler
BACKGROUND: Management of Class III malocclusion is one of the most challenging treatments in orthodontics, and several methods have been advocated for treatment of this condition. A new treatment protocol involves the use of an alternating rapid maxillary expansion and constriction (Alt-RAMEC) protocol, in conjunction with full-time Class III elastic wear and coupled with the use of temporary anchorage devices (TADs). The aim of this study was to evaluate the dento-skeletal and profile soft tissue effects of this novel protocol in growing participants with retrognathic maxilla...
December 11, 2017: Progress in Orthodontics
https://www.readbyqxmd.com/read/29220087/dual-energy-based-metal-segmentation-for-metal-artifact-reduction-in-dental-computed-tomography
#5
Mohamed A A Hegazy, Mohamed Elsayed Eldib, Daniel Hernandez, Myung Hye Cho, Min Hyoung Cho, Soo Yeol Lee
PURPOSE: In a dental CT scan, the presence of dental fillings or dental implants generates severe metal artifacts that often compromise readability of the CT images. Many metal artifact reduction (MAR) techniques have been introduced, but dental CT scans still suffer from severe metal artifacts particularly when multiple dental fillings or implants exist around the region of interest. The high attenuation coefficient of teeth often causes erroneous metal segmentation, compromising the MAR performance...
December 8, 2017: Medical Physics
https://www.readbyqxmd.com/read/29206706/quantifying-dental-office-originating-adverse-events-the-dental-practice-study-methods
#6
Oluwabunmi Tokede, Muhammad Walji, Rachel Ramoni, Donald B Rindal, Donald Worley, Nutan Hebballi, Krishna Kumar, Claire van Strien, Mengxia Chen, Shaked Navat-Pelli, Hongchun Liu, Jini Etolue, Alfa Yansane, Enihomo Obadan-Udoh, Casey Easterday, Chris Enstad, Sheryl Kane, William Rush, Elsbeth Kalenderian
BACKGROUND: Preventable medical errors in hospital settings are the third leading cause of deaths in the United States. However, less is known about harm that occurs in patients in outpatient settings, where the majority of care is delivered. We do not know the likelihood that a patient sitting in a dentist chair will experience harm. Additionally, we do not know if patients of certain race, age, sex, or socioeconomic status disproportionately experience iatrogenic harm. METHODS: We initiated the Dental Practice Study (DPS) with the aim of determining the frequency and types of adverse events (AEs) that occur in dentistry on the basis of retrospective chart audit...
December 5, 2017: Journal of Patient Safety
https://www.readbyqxmd.com/read/29203072/practical-and-theoretical-considerations-on-the-fracture-toughness-testing-of-dental-restorative-materials
#7
REVIEW
Renan Belli, Michael Wendler, José I Zorzin, Ulrich Lohbauer
BACKGROUND: An important tool in materials research, development and characterization regarding mechanical performance is the testing of fracture toughness. A high level of accuracy in executing this sort of test is necessary, with strict requirements given in extensive testing standard documents. Proficiency in quality specimen fabrication and test requires practice and a solid theoretical background, oftentimes overlooked in the dental community. AIMS: In this review we go through some fundamentals of the fracture mechanics concepts that are relevant to the understanding of fracture toughness testing, and draw attention to critical aspects of practical nature that must be fulfilled for validity and accuracy in results...
December 1, 2017: Dental Materials: Official Publication of the Academy of Dental Materials
https://www.readbyqxmd.com/read/29188699/ceramic-fracture-in-metal-ceramic-restorations-the-aetiology
#8
Ayesha Aslam, Danish Azeem Khan, Syed Hammad Hassan, Bilal Ahmed
All dental restorations are liable to failure during function. Failure could be biologic, aesthetic, mechanical or a combination. Ceramic restorations in particular, including metal-ceramics, are prone to mechanical fracture, especially the fracture of veneering porcelain. Fracture of a metal-ceramic restoration jeopardizes function as well as aesthetics. It is equally onerous to manage for both patient and dentist. Optimal management of such cases requires a detailed knowledge of the aetiology behind this phenomenon...
May 2017: Dental Update
https://www.readbyqxmd.com/read/29185172/correction-to-effects-of-nicomethanol-hydrofluoride-on-dental-enamel-and-synthetic-apatites-a-role-for-anti-caries-protection
#9
N Sharkov
The author of the article "Effects of nicomethanol hydrofluoride on dental enamel and synthetic apatites: a role for anti-caries protection", N. Sharkov, requested open access publication but owing to an error by the publisher the article was published electronically on the publisher's internet portal (currently SpringerLink) on 4 November 2017 without open access.
December 2017: European Archives of Paediatric Dentistry: Official Journal of the European Academy of Paediatric Dentistry
https://www.readbyqxmd.com/read/29181299/persistent-bacteremia-secondary-to-delayed-identification-of-lactobacillus-in-the-setting-of-mitral-valve-endocarditis
#10
Cody Stroupe, Joseph Pendley, Emmanuel Isang, Benjamin Helms
Introduction: Lactobacillus species causing infective endocarditis is rare. Most reported cases arise from the oral ingestion of Lactobacillus via dairy or nutritional supplements in patients with congenital valve disease or replacement. We present a case of native valve bacterial endocarditis caused by Lactobacillus arising from dental abscesses. Additionally, there was an error in identification of the Lactobacillus as Corynebacterium, which led to inadequate treatment. Presentation of case: A 51-year-old male presented to an outside clinic with several weeks of subjective fevers and malaise...
2017: IDCases
https://www.readbyqxmd.com/read/29172065/dna-methylation-markers-in-combination-with-skeletal-and-dental-ages-to-improve-age-estimation-in-children
#11
Lei Shi, Fan Jiang, Fengxiu Ouyang, Jun Zhang, Zhimin Wang, Xiaoming Shen
Age estimation is critical in forensic science, in competitive sports and games and in other age-related fields, but the current methods are suboptimal. The combination of age-associated DNA methylation markers with skeletal age (SA) and dental age (DA) may improve the accuracy and precision of age estimation, but no study has examined this topic. In the current study, we measured SA (GP, TW3-RUS, and TW3-Carpal methods) and DA (Demirjian and Willems methods) by X-ray examination in 124 Chinese children (78 boys and 46 girls) aged 6-15 years...
November 17, 2017: Forensic Science International. Genetics
https://www.readbyqxmd.com/read/29167713/the-effect-of-social-geographic-factors-on-the-untreated-tooth-decay-among-head-start-children
#12
Masahiro Heima, Margaret Ferretti, Mehveen Qureshi, Gerald Ferretti
Background: Disparities among untreated dental caries exist for children from low-income families in the United States. Understanding of the mechanism of the disparities is required to reduce it and social geographic factors are one of the important influences. Although the effect of fluoridated water has been well reported, studies of other sociogeograpic factors, such as the density of available dentists, are still very limited. The objective of this study is to explore the effect of sociogeographic factors on the number of primary teeth with untreated dental caries among children from low-income families who are enrolled in Head Start programs throughout Northeast Ohio of the United States...
October 2017: Journal of Clinical and Experimental Dentistry
https://www.readbyqxmd.com/read/29160351/writing-scientific-manuscripts-most-common-mistakes
#13
Jorge Faber
I have had the privilege of serving as editor-in-chief for 11 years of two scientific journals: The Dental Press Journal of Orthodontics and the Journal of the World Federation of Orthodontists. I had the opportunity to read and correct thousands of manuscripts. This experience was greatly enriching, because reading a text professionally completely differs from the perspective of readers in general. The routine practice of correcting manuscripts has made me realize that some errors recur frequently. To help authors to improve their manuscripts before submission, these problems are discussed here in the order that they appear in conventional manuscript sections...
September 2017: Dental Press Journal of Orthodontics
https://www.readbyqxmd.com/read/29157461/automated-outcome-scoring-in-a-virtual-reality-simulator-for-endodontic-surgery
#14
Myat Su Yin, Peter Haddawy, Siriwan Suebnukarn, Phattanapon Rhienmora
BACKGROUND AND OBJECTIVE: We address the problem of automated outcome assessment in a virtual reality (VR) simulator for endodontic surgery. Outcome assessment is an essential component of any system that provides formative feedback, which requires assessing the outcome, relating it to the procedure, and communicating in a language natural to dental students. This study takes a first step toward automated generation of such comprehensive feedback. METHODS: Virtual reference templates are computed based on tooth anatomy and the outcome is assessed with a 3D score cube volume which consists of voxel-level non-linear weighted scores based on the templates...
January 2018: Computer Methods and Programs in Biomedicine
https://www.readbyqxmd.com/read/29129975/forensic-age-estimation-of-chinese-malaysian-adults-by-evaluating-occlusal-tooth-wear-using-modified-kim-s-index
#15
Chai Kit Lu, Margaret Chia Soo Yee, Spoorthi Banavar Ravi, Rohit Pandurangappa
Background and Objective: Evaluation of dental attrition is an easy and relatively accurate approach to estimating the age of an adult either ante- or postmortem for some specific population. Dental attrition represents a progressive physiological age change that can be measured using variety of indices to aid as an adjunct in forensic age estimation. Some of the previously proposed indices have their own practical limitations. This paper focuses on using modified Kim's criteria to score dental attrition to estimate the age of Chinese Malaysian adults and validate it...
2017: International Journal of Dentistry
https://www.readbyqxmd.com/read/29118160/a-dental-radiography-checklist-as-a-tool-for-quality-improvement
#16
Monica Williamson Nenad, Colleen Halupa, Ann Eshenaur Spolarich, JoAnn R Gurenlian
Purpose: A checklist intervention was applied to the dental radiographic acquisition process to determine its effectiveness in improving the diagnostic value of bitewing images and reducing patient exposure to unnecessary radiation.Methods: A mixed-method, nonrandomized research design using two dental hygiene program cohorts (n=33) as control and intervention groups was used to assess the effect of a radiographic checklist on the number and type of radiographic imaging errors. The relationship between perceived value of the checklist and willingness to continue its use was examined and analyzed using descriptive statistics...
December 2016: Journal of Dental Hygiene: JDH
https://www.readbyqxmd.com/read/29115677/applicability-of-3d-dental-reconstruction-in-cervical-odontometrics
#17
Seyedeh M Kazzazi, Elena F Kranioti
OBJECTIVES: The objective of this study was to assess the accuracy, reliability, and reproducibility of computed tomography (CT) images in measuring cervical mesiodistal and buccolingual tooth sizes, by comparing the values obtained by 3D virtual models from CT images with those obtained using digital calipers. MATERIALS AND METHODS: In total, 530 maxillary and mandibular teeth of 51 individuals from two Iron Age sites were scanned using a Siemens Somatom sensation 64-slice computed tomography machine, and the images were reconstructed and measured...
November 8, 2017: American Journal of Physical Anthropology
https://www.readbyqxmd.com/read/29112027/dentists-survey-on-adverse-events-during-their-clinical-training
#18
Alfredo Alan Osegueda-Espinosa, Leonor Sánchez-Pérez, Bernardo Perea-Pérez, Elena Labajo-González, A Enrique Acosta-Gio
BACKGROUND: Adverse events (AEs) begin challenging the safe practice of dentistry early when students start treating patients at dental school. We assessed the frequency with which dentists caused common AEs during their undergraduate clinical training. METHODS: A convenience sample of dentists, graduated from more than 34 dental schools in Mexico and other Spanish speaking countries, answered a confidential, self-administered questionnaire with closed-format questions on common AEs they caused and their active errors that could have led to AEs in the teaching clinics...
November 4, 2017: Journal of Patient Safety
https://www.readbyqxmd.com/read/29110921/3d-printed-versus-conventionally-cured-provisional-crown-and-bridge-dental-materials
#19
Anthony Tahayeri, MaryCatherine Morgan, Ana P Fugolin, Despoina Bompolaki, Avathamsa Athirasala, Carmem S Pfeifer, Jack L Ferracane, Luiz E Bertassoni
OBJECTIVES: To optimize the 3D printing of a dental material for provisional crown and bridge restorations using a low-cost stereolithography 3D printer; and compare its mechanical properties against conventionally cured provisional dental materials. METHODS: Samples were 3D printed (25×2×2mm) using a commercial printable resin (NextDent C&B Vertex Dental) in a FormLabs1+ stereolithography 3D printer. The printing accuracy of printed bars was determined by comparing the width, length and thickness of samples for different printer settings (printing orientation and resin color) versus the set dimensions of CAD designs...
October 27, 2017: Dental Materials: Official Publication of the Academy of Dental Materials
https://www.readbyqxmd.com/read/29100105/effectiveness-of-three-age-estimation-methods-based-on-dental-and-skeletal-development-in-a-sample-of-young-brazilians
#20
Marcelo Afonso Machado, Eduardo Daruge Júnior, Mário Marques Fernandes, Igor Felipe Pereira Lima, Graziela Oro Cericato, Ademir Franco, Luiz Renato Paranhos
OBJECTIVE: This study compared three methods designed for age estimation. METHODS: A sample of 468 radiographs (234 panoramic and 234 carpal radiographs) collected from patients ranging from 5 to 14 years old (mean age: 11.27years old±2.27years) was used. Three age estimation methods: were applied: one founded on dental development, one founded on hand and wrist development, and a method combining both measurements. For each method, the mean error (ME), mean absolute error (MAE), root mean square error (RMSE), and mean percentage of absolute error (MPAE) were quantified...
October 18, 2017: Archives of Oral Biology
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