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Isil Cekic-Nagas, Gulfem Ergun, Ferhan Egilmez, Pekka Kalevi Vallittu, Lippo Veli Juhana Lassila
PURPOSE: The aim of this study was to evaluate the effects of hydrofluoric acid treatment on bond strength of resin cements to three different types of ceramic/glass containing CAD-CAM block composite materials. METHODS: CAD-CAM block materials of polymer infiltrated (Vita Enamic), resin nanoceramic (Lava Ultimate) and nanoceramic (Cerasmart) with a thickness of 1.5mm were randomly divided into two groups according to the surface treatment performed. In Group 1, specimens were wet-ground with silicon carbide abrasive papers up to no...
March 10, 2016: Journal of Prosthodontic Research
Juho Suojanen, Junnu Leikola, Patricia Stoor
The use of virtual surgery, patient-specific saw and drill guides, and custom-made osteosynthesis plates is rapidly spreading from deformity surgery to orthognathic surgery. Most of the commercially available systems are using computer-aided design/computer-aided manufacture (CAD/CAM) wafers to produce patient-specific saw guides. However, most plate systems provided are still the conventional "in stock" mini plates that can be individually designed by pre-bending according to the stereolithographic model of the patient...
September 23, 2016: Journal of Cranio-maxillo-facial Surgery
Yazan M Dweiri, Matthew A Stone, Dustin J Tyler, Grant A McCallum, Dominique M Durand
Many attempts have been made to manufacture multi-contact nerve cuff electrodes that are safe, robust and reliable for long term neuroprosthetic applications. This protocol describes a fabrication technique of a modified cylindrical nerve cuff electrode to meet these criteria. Minimum computer-aided design and manufacturing (CAD and CAM) skills are necessary to consistently produce cuffs with high precision (contact placement 0.51 ± 0.04 mm) and various cuff sizes. The precision in spatially distributing the contacts and the ability to retain a predefined geometry accomplished with this design are two criteria essential to optimize the cuff's interface for selective recording and stimulation...
October 4, 2016: Journal of Visualized Experiments: JoVE
Abdulaziz AlHelal, Hamad S AlRumaih, Mathew T Kattadiyil, Nadim Z Baba, Charles J Goodacre
STATEMENT OF PROBLEM: Clinical studies comparing the retention values of milled denture bases with those of conventionally processed denture bases are lacking. PURPOSE: The purpose of this clinical study was to compare the retention values of conventional heat-polymerized denture bases with those of digitally milled maxillary denture bases. MATERIAL AND METHODS: Twenty individuals with completely edentulous maxillary arches participated in this study...
October 17, 2016: Journal of Prosthetic Dentistry
Kuang-Wei Hsu, Yu-Fu Shen, Pein-Chi Wei
STATEMENT OF PROBLEM: In addition to the original abutments provided by implant companies, compatible computer-aided design and computer-aided manufacturing (CAD-CAM) abutments are also available from different manufacturers. However, the combination of abutments and implant systems from different manufacturers may lead to mechanical problems between components. Little has been reported on the clinical performance of this treatment option. PURPOSE: The purpose of this retrospective case series was to evaluate the outcome of compatible CAD-CAM titanium abutments (TiAs) for posterior single-implant tooth replacement (PSITR) up to 6 years after insertion...
October 17, 2016: Journal of Prosthetic Dentistry
P Pott, A Rzasa, M Stiesch, M Eisenburger
This in vitro study compares a new system for manual chair side fabrication of indirect composite restorations, which uses silicone models after alginate impressions, to CAD/CAM-technology and laboratory manual production techniques. MATRIALS AND METHODS: and study design Each 10 composite inlays were fabricated using different types of production techniques: CAD/CAM- technology (A), the new inlay system (B), plaster model after alginate impression (C) or silicone impression (D). The inlays were adapted into a metal tooth and silicone replicas of the cement gaps were made and measured...
September 2016: European Journal of Paediatric Dentistry: Official Journal of European Academy of Paediatric Dentistry
H Wang, P J Lv, Y Wang, Y C Sun
OBJECTIVE: To quantitatively evaluate the assembly precision of fabricating complete denture by computer numerical control (CNC) in manufacturing dentition and baseplate separately plus adhesive molding. METHODS: The 3D surface data of a standard edentulous maxilla plaster cast model and the temporary base-plate were obtained using an Activity 880 3D scanner. The data (data1) of a complete denture were designed using a set of computer aided design (CAD) software developed by the research group of this study...
October 18, 2016: Beijing da Xue Xue Bao. Yi Xue Ban, Journal of Peking University. Health Sciences
Shruti Digholkar, V N V Madhav, Jayant Palaskar
PURPOSE: The purpose of this study was to evaluate and compare the flexural strength and microhardness of provisional restorative materials fabricated utilizing rapid prototyping (RP), Computer Assisted Designing and Computer Assisted Milling (CAD-CAM) and conventional method. MATERIALS AND METHODS: Twenty specimens of dimensions 25 mm × 2 mm × 2 mm (ADA-ANSI specification #27) were fabricated each using: (1) Three dimensional (3D) printed light-cured micro-hybrid filled composite by RP resin group, (2) a milled polymethyl methacrylate (CH) using CAD-CAM (CC resin group), and (3) a conventionally fabricated heat activated polymerized CH resin group...
October 2016: Journal of Indian Prosthodontic Society
Lorena Oliveira Pedroche, Sérgio Rocha Bernardes, Moira Pedroso Leão, Cibele Cândida de Almeida Kintopp, Gisele Maria Correr, Bárbara Pick Ornaghi, Carla Castiglia Gonzaga
The objective of this study was to evaluate the marginal and internal fit of zirconia copings obtained with different digital scanning methods. A human mandibular first molar was set in a typodont with its adjacent and antagonist teeth and prepared for an all-ceramic crown. Digital impressions were made using an intraoral scanner (3Shape). Polyvinyl siloxane impressions and Type IV gypsum models were also obtained and scanned with a benchtop laboratory scanner (3Shape D700). Ten zirconia copings were fabricated for each group using CAD-CAM technology...
October 10, 2016: Brazilian Oral Research
Pascal Magne, Luís Henrique Schlichting
Currently, no dental material can exactly match the unique properties of dentin and enamel. Recently, a revolutionary approach was introduced in which a real tooth was utilized in combination with computer-aided design/computer-aided manufacturing (CAD/CAM) technology to obtain a natural CAD/CAM restoration. After 4 years of clinical service, the case was reevaluated and revealed an optimal condition of the biomimetic restoration.
2016: International Journal of Esthetic Dentistry
M Carrabba, A Vichi, G Vultaggio, S Pallari, R Paravina, M Ferrari
OBJECTIVES: To evaluate surface roughness and gloss of feldspathic ceramic blocks for chairside CAD/CAM systems before and after finishing and polishing. METHODS: VITA Mark II ceramic blocks for the CEREC CAD/CAM system were cut perpendicularly in order to obtain a total of 70 specimens (14 × 18 × 3 mm). The flat surface was roughened using a grinder/polisher with dry 120-grit silicone-carbide paper. Surface roughness and gloss were measured using a digital profilometer (Ra) and a glossmeter (GU), respectively...
October 10, 2016: Operative Dentistry
Danilo Gonzaga de França, Maria Helena Morais, Flávio D das Neves, Adriana Fonte Carreiro, Gustavo As Barbosa
PURPOSE: The aim of this study was to evaluate the effectiveness of fabrication methods (computer-aided design/computer-aided manufacture [CAD/CAM], copy-milling, and conventional casting) in the fit accuracy of three-unit, screw-retained fixed dental prostheses. MATERIALS AND METHODS: Sixteen three-unit implant-supported screw-retained frameworks were fabricated to fit an in vitro model. Eight frameworks were fabricated using the CAD/CAM system, four in zirconia and four in cobalt-chromium...
October 5, 2016: International Journal of Oral & Maxillofacial Implants
Patricia-Anca Steinmassl, Verena Wiedemair, Christian Huck, Florian Klaunzer, Otto Steinmassl, Ingrid Grunert, Herbert Dumfahrt
OBJECTIVES: Computer-aided design (CAD)/computer-aided manufacturing (CAM) dentures are assumed to have more favourable material properties than conventionally fabricated dentures, among them a lower methacrylate monomer release. The aim of this study was to test this hypothesis. MATERIALS AND METHODS: CAD/CAM dentures were generated from ten different master casts by using four different CAD/CAM systems. Conventional, heat-polymerised dentures served as control group...
October 5, 2016: Clinical Oral Investigations
Renato Roperto, Hussein Assaf, Thiago Soares-Porto, Lisa Lang, Sorin Teich
BACKGROUND: Different CAD/CAM machines' generation may impact the restoration overall quality. The present study evaluated the marginal fit of CAD/CAM restorations manufactured with different generations of CEREC milling unit systems. MATERIAL AND METHODS: Sixteen typodont teeth were divided into two groups (n=8) according to the machine's generation assigned. These are control group (G1): Cerec AC with Bluecam/Cerec 3 milling unit and (G2): Cerec AC with Bluecam/MC XL Premium Package milling unit...
October 2016: Journal of Clinical and Experimental Dentistry
Maziar Montazerian, Edgar Dutra Zanotto
The global market for dental materials is predicted to exceed 10 billion dollars by 2020. The main drivers for this growth are easing the workflow of dentists and increasing the comfort of patients. Therefore, remarkable research projects have been conducted and are currently underway to develop improved or new dental materials with enhanced properties or that can be processed using advanced technologies, such as CAD/CAM or 3D printing. Among these materials, zirconia, glass or polymer-infiltrated ceramics, and glass-ceramics (GCs) are of great importance...
October 4, 2016: Journal of Biomedical Materials Research. Part A
Mike Skramstad, Dennis J Fasbinder
Clinical application of zirconia has been expanding due to the high strength properties it offers. Initial use of zirconia was as a coping or substructure material replacing cast metal. More recent formulations have been introduced for monolithic zirconia contour designs. New chairside computer-aided design and computeraided manufacturing (CAD/CAM) technology has made it possible for dentists to deliver 3-unit bridges in a single appointment. This case report will present such a clinical application.
October 2016: Compendium of Continuing Education in Dentistry
Frank A Spitznagel, Alexander Vuck, Petra C Gierthumuehlen, Markus B Blatz, Sebastian D Horvath
Recently, hybrid materials have been introduced to the dental market. Together with computer-assisted design/computer-assisted manufacturing (CAD/CAM) composite resins, they form a new class of dental CAD/CAM materials that combine the positive effects of ceramics and composites. As bonding is essential for their clinical longevity, it is crucial to have a good understanding of their material properties and cementation protocols. This review offers clinicians an overview of available hybrid materials and recommendations for their respective adhesive placements...
October 2016: Compendium of Continuing Education in Dentistry
Sebastian D Horvath
Hybrid materials are a recent addition to the dental armamentarium for computer-assisted design/ computer-assisted manufacturing (CAD/CAM)-based restorative dentistry. They are intended to provide dentists with the capability of restoring single teeth in one appointment with a material that emulates the structure and physical properties of natural teeth. This article aims to provide an overview of currently available hybrid materials and offer the reader further understanding of their key clinical parameters and possible limitations...
October 2016: Compendium of Continuing Education in Dentistry
Bjørn Einar Dahl, Hans Jacob Rønold, Jon E Dahl
STATEMENT OF PROBLEM: Whether single crowns produced by computer-aided design and computer-aided manufacturing (CAD-CAM) have an internal fit comparable to crowns made by lost-wax metal casting technique is unknown. PURPOSE: The purpose of this in vitro study was to compare the internal fit of single crowns produced with the lost-wax and metal casting technique with that of single crowns produced with the CAD-CAM technique. MATERIAL AND METHODS: The internal fit of 5 groups of single crowns produced with the CAD-CAM technique was compared with that of single crowns produced in cobalt-chromium with the conventional lost-wax and metal casting technique...
September 28, 2016: Journal of Prosthetic Dentistry
B Stawarczyk, D Awad, N Ilie
Determining the amount of blue light (360-540nm) passing through nine monolithic computer-aided design/computer-aided manufacturing (CAD/CAM) materials depends on material thickness, initial irradiance, and the distance between the curing unit and the specimen's surface. A total of 180 specimens of two thicknesses (1 mm and 2 mm, n=10/subgroup) were fabricated from TelioCAD, VITA CAD-Temp (VCT), experimental nanocomposite, LAVA Ultimate (LU), VITA ENAMIC (VE), VITA MarkII (VM), IPS EmpressCAD (IEC), IPS e.maxCAD (IEM), and CELTRA DUO (CD)...
September 2016: Operative Dentistry
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