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Digital dentistry

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
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
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
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
Albert Mehl
No abstract text is available yet for this article.
2016: International Journal of Computerized Dentistry
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
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
Hari Parkash
No abstract text is available yet for this article.
July 2016: Contemporary Clinical Dentistry
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
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
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
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
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
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
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
K Khalid, S Yousif, A Satti
Forensic Odontology is a vital component of forensic science and one branch involves the application of dental science to the identification of unknown human remains. The aim of this study is to investigate the discriminatory potential for identification of the radiographic morphology of obturated single root canals. Thirty periapical radiographs of patients having endodontic treatment of single rooted canals were selected randomly from the data bank of the digital X- ray system present in the restorative department, University of Science and Technology, Sudan...
2016: Journal of Forensic Odonto-stomatology
John Weston
While digital methods have a firm position in dentistry, a total digital workflow for multi-unit layered restorations has yet to be fully realized. Many clinicians are using a CAD/CAM workflow of some kind, but there is still a significant gap to be filled for completing the digital workflow. This article describes how practitioners can transition into the full digital workflow, showing the use of digital processes for anterior cosmetic cases. The pros and cons of "going fully digital" in an effort to increase efficiency while maintaining high-level quality with regards to fit and ceramics layering will be discussed...
February 2016: Compendium of Continuing Education in Dentistry
Lauren Oliveira Lima Bohner, Pedro Tortamano Neto, Ahad Shahid Ahmed, Matsuyoshi Mori, Dalva Cruz Laganá, Newton Sesma
OBJECTIVE: The aim of this review was to update the literature with regard to the digital methods available by CEREC Chairside system to register and design the occlusion, to report their efficacy and technical innovations in the field of Restorative Dentistry. A search strategy was performed using the key-words: "virtual articulator," or "CAD-CAM and occlusal recording," or "CAD-CAM and occlusion register," or "CAD-CAM and occlusal contacts," or "CAD-CAM and prosthesis." MATERIAL AND METHODS: Inclusion criteria comprised studies evaluating the use of digital methods available by CEREC System for occlusal registration and design during prosthodontics treatment...
July 2016: Journal of Esthetic and Restorative Dentistry
Fan Zhang, Kyung-Jin Suh, Kyung-Min Lee
PURPOSE: Dental measurements have been commonly taken from plaster dental models obtained from alginate impressions can. Through the use of an intraoral scanner, digital impressions now acquire the information directly from the mouth. The purpose of this study was to determine the validity of the intraoral scans compared to plaster models. MATERIALS AND METHODS: Two types of dental models (intraoral scan and plaster model) of 20 subjects were included in this study...
2016: PloS One
Nicolas Lebon, Laurent Tapie, Francois Duret, Jean-Pierre Attal
Nowadays, dental numerical controlled (NC) milling machines are available for dental laboratories (labside solution) and dental production centers. This article provides a mechanical engineering approach to NC milling machines to help dental technicians understand the involvement of technology in digital dentistry practice. The technical and economic criteria are described for four labside and two production center dental NC milling machines available on the market. The technical criteria are focused on the capacities of the embedded technologies of milling machines to mill prosthetic materials and various restoration shapes...
2016: International Journal of Computerized Dentistry
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