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https://www.readbyqxmd.com/read/27915125/artificial-neural-networks-as-a-powerful-numerical-tool-to-classify-specific-features-of-a-tooth-based-on-3d-scan-data
#1
Stefan Raith, Eric Per Vogel, Naeema Anees, Christine Keul, Jan-Frederik Güth, Daniel Edelhoff, Horst Fischer
Chairside manufacturing based on digital image acquisition is gainingincreasing importance in dentistry. For the standardized application of these methods, it is paramount to have highly automated digital workflows that can process acquired 3D image data of dental surfaces. Artificial Neural Networks (ANNs) arenumerical methods primarily used to mimic the complex networks of neural connections in the natural brain. Our hypothesis is that an ANNcan be developed that is capable of classifying dental cusps with sufficient accuracy...
November 27, 2016: Computers in Biology and Medicine
https://www.readbyqxmd.com/read/27892837/conservative-anterior-partial-coverage-cad-cam-restoration
#2
J T May
Computer-aided design and manufacturing technology enables practitioners to create, in a single appointment, indirect restorations that are esthetic and functionally unique to the patient's situation. The popular effort to perform minimally invasive dentistry using digital techniques with chairside milling can lead dentists to novel individualized restorative treatment. This article demonstrates a conservative anterior partial coverage restoration, utilizing both digital technology and chairside ceramic characterization to achieve an optimal esthetic outcome while preserving healthy tooth structure...
November 28, 2016: Operative Dentistry
https://www.readbyqxmd.com/read/27857080/survey-of-uk-dentists-regarding-the-use-of-cad-cam-technology
#3
D Tran, M Nesbit, H Petridis
Statement of the problem Digital workflows (CAD/CAM) have been introduced in dentistry during recent years. No published information exists on dentists' use and reporting of this technology.Purpose The purpose of this survey was to identify the infiltration of CAD/CAM technology in UK dental practices and to investigate the relationship of various demographic factors to the answers regarding use or non-use of this technology.Materials and methods One thousand and thirty-one online surveys were sent to a sample of UK dentists composing of both users and non-users of CAD/CAM...
November 18, 2016: British Dental Journal
https://www.readbyqxmd.com/read/27843885/distortion-of-digital-panoramic-radiographs-used-for-implant-site-assessment
#4
Rayyan Abdulhamid Kayal
AIMS: This study is conducted to determine the amount of distortion of digital panoramic radiographs. MATERIALS AND METHODS: Panoramic radiographs of all patients who received dental implants in the years 2012 and 2013 were selected from the records at the faculty of dentistry, King Abdulaziz University. Radiographs were analyzed using the R4 Kodak Software for linear measurements of implants length and width. The measurements were compared to the actual size of the implant, and the amount of distortion was calculated...
October 2016: Journal of Orthodontic Science
https://www.readbyqxmd.com/read/27836856/health-professional-perspectives-on-the-management-of-multimorbidity-and-polypharmacy-for-older-patients-in-australia
#5
Kevin Peter Mc Namara, Bianca Daphne Breken, Hamzah Tariq Alzubaidi, J Simon Bell, James A Dunbar, Christine Walker, Andrea Hernan
BACKGROUND: delivering appropriate care for patients with multimorbidity and polypharmacy is increasingly challenging. Challenges for individual healthcare professions are known, but only little is known about overall healthcare team implementation of best practice for these patients. OBJECTIVE: to explore current approaches to multimorbidity management, and perceived barriers and enablers to deliver appropriate medications management for community-dwelling patients with multimorbidity and polypharmacy, from a broad range of healthcare professional (HCP) perspectives in Australia...
November 10, 2016: Age and Ageing
https://www.readbyqxmd.com/read/27708727/masseter-muscle-activity-in-track-and-field-athletes-a-pilot-study
#6
Hideyuki Nukaga, Tomotaka Takeda, Kazunori Nakajima, Keishiro Narimatsu, Takamitsu Ozawa, Keiichi Ishigami, Kazuo Funato
Teeth clenching has been shown to improve remote muscle activity (by augmentation of the Hoffmann reflex), and joint fixation (by decreased reciprocal inhibition) in the entire body. Clenching could help maintain balance, improve systemic function, and enhance safety. Teeth clenching from a sports dentistry viewpoint was thought to be important and challenging. Therefore, it is quite important to investigate mastication muscles' activity and function during sports events for clarifying a physiological role of the mastication muscle itself and involvement of mastication muscle function in whole body movement...
2016: Open Dentistry Journal
https://www.readbyqxmd.com/read/27706225/examination-of-the-position-accuracy-of-implant-abutments-reproduced-by-intra-oral-optical-impression
#7
Hitoshi Ajioka, Hidemichi Kihara, Chikayuki Odaira, Takuya Kobayashi, Hisatomo Kondo
An impression technique called optical impression using intraoral scanner has attracted attention in digital dentistry. This study aimed to evaluate the accuracy of the optical impression, comparing a virtual model reproduced by an intraoral scanner to a working cast made by conventional silicone impression technique. Two implants were placed on a master model. Working casts made of plaster were fabricated from the master model by silicone impression. The distance between the ball abutments and the angulation between the healing abutments of 5 mm and 7 mm height at master model were measured using Computer Numerical Control Coordinate Measuring Machine (CNCCMM) as control...
2016: PloS One
https://www.readbyqxmd.com/read/27677220/randomized-controlled-within-subject-evaluation-of-digital-and-conventional-workflows-for-the-fabrication-of-lithium-disilicate-single-crowns-part-iii-marginal-and-internal-fit
#8
Marco Zeltner, Irena Sailer, Sven Mühlemann, Mutlu Özcan, Christoph H F Hämmerle, Goran I Benic
STATEMENT OF PROBLEM: Trials comparing the overall performance of digital with that of conventional workflows in restorative dentistry are needed. PURPOSE: The purpose of the third part of a series of investigations was to test whether the marginal and internal fit of monolithic crowns fabricated with fully digital workflows differed from that of crowns fabricated with the conventional workflow. MATERIAL AND METHODS: In each of 10 participants, 5 monolithic lithium disilicate crowns were fabricated for the same abutment tooth according to a randomly generated sequence...
September 24, 2016: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/27677219/a-microcomputed-tomography-evaluation-of-the-marginal-fit-of-cobalt-chromium-alloy-copings-fabricated-by-new-manufacturing-techniques-and-alloy-systems
#9
Eun-Ha Kim, Du-Hyeong Lee, Sung-Min Kwon, Tae-Yub Kwon
STATEMENT OF PROBLEM: Although new digital manufacturing techniques are attracting interest in dentistry, few studies have comprehensively investigated the marginal fit of fixed dental prostheses fabricated with such techniques. PURPOSE: The purpose of this in vitro microcomputed tomography (μCT) study was to evaluate the marginal fit of cobalt-chromium (Co-Cr) alloy copings fabricated by casting and 3 different computer-aided design and computer-aided manufacturing (CAD-CAM)-based processing techniques and alloy systems...
September 24, 2016: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/27644176/editorial-our-impact-factor-and-the-digitalization-of-dentistry
#10
Albert Mehl
No abstract text is available yet for this article.
2016: International Journal of Computerized Dentistry
https://www.readbyqxmd.com/read/27643568/glossary-of-digital-dental-terms-american-college-of-prosthodontists
#11
Gerald T Grant, Stephen D Campbell, Radi M Masri, Michael R Andersen
No abstract text is available yet for this article.
October 2016: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
https://www.readbyqxmd.com/read/27635140/-digitally-oriented-materials-focus-on-lithium-disilicate-ceramics
#12
REVIEW
Fernando Zarone, Marco Ferrari, Francesco Guido Mangano, Renato Leone, Roberto Sorrentino
The present paper was aimed at reporting the state of the art about lithium disilicate ceramics. The physical, mechanical, and optical properties of this material were reviewed as well as the manufacturing processes, the results of in vitro and in vivo investigations related to survival and success rates over time, and hints for the clinical indications in the light of the latest literature data. Due to excellent optical properties, high mechanical resistance, restorative versatility, and different manufacturing techniques, lithium disilicate can be considered to date one of the most promising dental materials in Digital Dentistry...
2016: International Journal of Dentistry
https://www.readbyqxmd.com/read/27630486/digital-dentistry-unraveling-the-mysteries-of-computer-aided-design-computer-aided-manufacturing-in-prosthodontic-rehabilitation
#13
EDITORIAL
Hari Parkash
No abstract text is available yet for this article.
July 2016: Contemporary Clinical Dentistry
https://www.readbyqxmd.com/read/27595882/virtual-setup-application-in-orthodontic-practice
#14
Leonardo T Camardella, Eduardo Kant C Rothier, Oswaldo V Vilella, Edwin M Ongkosuwito, Karel Hero Breuning
BACKGROUND: A plaster dental model is a patient's traditional three-dimensional (3D) record. If the dental crowns from a plaster model are separated and positioned in wax, this setup of the crowns can be used to simulate orthodontic treatment. The traditional way to make this dental setup requires significant time by the orthodontist and in the orthodontic lab. New developments in dentistry and orthodontics include the possibility of virtual setups. AIM: In this article, the differences between conventional setups with plaster models and virtual setups are discussed...
September 5, 2016: Journal of Orofacial Orthopedics, Fortschritte der Kieferorthopädie
https://www.readbyqxmd.com/read/27544966/-navigation-in-implantology-accuracy-assessment-regarding-the-literature
#15
Ibrahim Ádám Barrak, Endre Varga, József Piffko
Our objective was to assess the literature regarding the accuracy of the different static guided systems. After applying electronic literature search we found 661 articles. After reviewing 139 articles, the authors chose 52 articles for full-text evaluation. 24 studies involved accuracy measurements. Fourteen of our selected references were clinical and ten of them were in vitro (modell or cadaver). Variance-analysis (Tukey's post-hoc test; p < 0.05) was conducted to summarize the selected publications. Regarding 2819 results the average mean error at the entry point was 0...
June 2016: Fogorvosi Szemle
https://www.readbyqxmd.com/read/27534729/the-implementation-of-elaborative-feedback-for-qualitative-improvement-of-shade-matching-a-randomized-study
#16
Constanze Olms, Holger A Jakstat, Rainer Haak
OBJECTIVES: The objective of this prospective learning research study is to examine the impact of structured elaborative feedback in practical skills teaching of visual and digital shade matching. MATERIALS AND METHODS: A total of 60 preclinical dental students participated in the study. The mean average age was 23 years, of which 37 were female (61.7%) and 23 male (38.3%). The participants were randomly divided into a study and control group (n = 30 each). Recording of shade matching was carried out on the phantom patient using clinically simulated settings with elaborative feedback in the study group (T1)...
September 2016: Journal of Esthetic and Restorative Dentistry
https://www.readbyqxmd.com/read/27460321/randomized-controlled-within-subject-evaluation-of-digital-and-conventional-workflows-for-the-fabrication-of-lithium-disilicate-single-crowns-part-i-digital-versus-conventional-unilateral-impressions
#17
Goran I Benic, Sven Mühlemann, Vincent Fehmer, Christoph H F Hämmerle, Irena Sailer
STATEMENT OF PROBLEM: Trials comparing the overall performance of fully digital and conventional workflows in reconstructive dentistry are needed. PURPOSE: The purpose of the first part of this randomized controlled clinical trial was to determine whether optical impressions produce different results from conventional impressions with respect to time efficiency and patient and operator perceptions of the clinical workflow. MATERIAL AND METHODS: Three digital impressions and 1 conventional impression were made in each of 10 participants according to a randomly generated sequence...
July 23, 2016: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/27454764/enamel-thickness-determination-by-optical-coherence-tomography-in-vitro-validation
#18
Amnah Algarni, Hobin Kang, Daniel Fried, George J Eckert, Anderson T Hara
Optical coherence tomography (OCT) has been introduced in dentistry as a nondestructive diagnostic imaging tool that does not utilize ionizing radiation. This study investigated the agreement between polarization-sensitive OCT (PS-OCT), microcomputed tomography (μ-CT), and histology for enamel thickness measurements. Human enamel samples were prepared and evaluated with μ-CT and PS-OCT and then sectioned and observed via digital transversal light microscopy. For all methods, a standard transversal section (b-scan) in each sample was selected, and the enamel thickness was measured at three predetermined positions using ImageJ analysis software...
2016: Caries Research
https://www.readbyqxmd.com/read/27350854/comparative-study-of-the-radiopacity-of-resin-cements-used-in-aesthetic-dentistry
#19
Raquel Montes-Fariza, Manuel Monterde-Hernández, Cristina Cabanillas-Casabella, Antonio Pallares-Sabater
PURPOSE: The aim of this study was to compare the radiopacity of 6 modern resin cements with that of human enamel and dentine using the Digora digital radiography system, to verify whether they meet the requirements of ANSI/ADA specification no. 27/1993 and the ISO 4049/2000 standard and assess whether their radiopacity is influenced by the thickness of the cement employed. MATERIALS AND METHODS: Three 3-thickness samples (0.5, 1 and 1.5 mm) were fabricated for each material...
June 2016: Journal of Advanced Prosthodontics
https://www.readbyqxmd.com/read/27350700/three-dimensional-validation-of-the-impact-of-the-quantity-of-teeth-or-tooth-parts-on-the-morphological-difference-between-twin-dentitions
#20
A Franco, G Willems, P H Couto Souza, W Coucke, P Thevissen
BACKGROUND: The number of teeth involved in cases of bite-mark analysis is generally fewer in comparison to the number of teeth available for cases of dental identification. This decreases the amount of information available and can hamper the distinction between bite suspects. The opposite is true in cases of dental identification and the assumption is that more teeth contribute to a higher degree of specificity and the possibility of identification in these cases. Despite being broadly accepted in forensic dentistry, this hypothesis has never been scientifically tested...
2016: Journal of Forensic Odonto-stomatology
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