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CAD/CAM in prosthodontic

Krysta Sellers, John M Powers, Sudarat Kiat-Amnuay
STATEMENT OF PROBLEM: The optimal retention of implant-supported ceramic crowns on zirconia abutments is a goal of prosthodontic treatment. PURPOSE: The purpose of this in vitro study was to evaluate the retentive strength of implant-supported IPS e.max CAD-CAM (e.max) crowns bonded to custom zirconia implant abutments with different cements. MATERIAL AND METHODS: An optical scan of a zirconia custom abutment and a complete-coverage modified crown was designed using an intraoral E4D scanner...
September 24, 2016: Journal of Prosthetic Dentistry
Jean Marc Pho Duc, Sandra Vargas Hüning, Márcio Lima Grossi
PURPOSE: This parallel randomized controlled trial (RCT) compared the efficacy of a computer-aided design/computer-assisted manufacture (CAD/CAM) splint versus a conventional stabilization splint in patients with temporomandibular disorders (TMD). MATERIALS AND METHODS: A sample of 48 age-matched TMD patients from the Ludwig Maximilian University Prosthodontic Department in Munich, Germany, were randomly allocated into groups 1 (CAD/CAM splint) and 2 (conventional splint)...
July 2016: International Journal of Prosthodontics
F Cattoni, F Mastrangelo, E F Gherlone, G Gastaldi
Purpose. Recently, the request of patients is changed in terms of not only esthetic but also previsualization therapy planning. The aim of this study is to evaluate a new 3D-CAD-CAM digital planning technique that uses a total digital smile process. Materials and Methods. Study participants included 28 adult dental patients, aged 19 to 53 years, with no oral, periodontal, or systemic diseases. For each patient, 3 intra- and extraoral pictures and intraoral digital impressions were taken. The digital images improved from the 2D Digital Smile System software and the scanner stereolithographic (STL) file was matched into the 3D-Digital Smile System to obtain a virtual previsualization of teeth and smile design...
2016: International Journal of Dentistry
Charlotte Grenade, Marie-Claire De Pauw-Gillet, Patrick Gailly, Alain Vanheusden, Amélie Mainjot
OBJECTIVES: Polymer-infiltrated-ceramic-network (PICN) materials constitute an innovative class of CAD-CAM materials offering promising perspectives in prosthodontics, but no data are available in the literature regarding their biological properties. The objective of the present study was to evaluate the in vitro biocompatibility of PICNs with human gingival fibroblasts (HGFs) in comparison with materials typically used for implant prostheses and abutments. METHODS: HGF attachment, proliferation and spreading on discs made of PICN, grade V titanium (Ti), yttrium zirconia (Zi), lithium disilicate glass-ceramic (eM) and polytetrafluoroethylene (negative control), were evaluated using a specific insert-based culture system (IBS-R)...
September 2016: Dental Materials: Official Publication of the Academy of Dental Materials
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
Paola C Saponaro, Burak Yilmaz, Reza H Heshmati, Edwin A McGlumphy
STATEMENT OF PROBLEM: Computer-aided design and computer-aided manufacture (CAD-CAM)-fabricated complete dentures (CD) seek to address the disadvantages associated with conventional CD fabrication. However, few if any randomized clinical trials, cross-sectional, and/or retrospective analyses are available for the clinical performance of CAD-CAM-fabricated CDs. PURPOSE: The purpose of this retrospective study was to evaluate clinician experience with digital CD fabrication attempted in a 2-visit protocol...
September 2016: Journal of Prosthetic Dentistry
Stefanie Seitz, Nicholas Cox, John D Jones, Richard Zimmermann
Digital dentistry is increasing prevalent throughout general dental practice. Scanned impression systems, CAD/CAM software, milling units, and 3D printers are becoming used with regularity by some private practitioners. This case report describes a combination of multiple technologies including intraoral scanning, 3D printing, and traditional impression and processing techniques used for fabricating a removable partial denture. The patient indicated that he was highly satisfied throughout the course of treatment and especially with the final result...
January 2016: Texas Dental Journal
Tarek El Kerdani, Arthur Nimmo
Canine protected articulation is widely accepted for patients requiring extensive oral rehabilitation. Computer-aided design and computer-aided manufacturing (CAD/CAM) restorations have been primarily designed in occlusion at the maximum intercuspal position. Designing a virtual articulator that is capable of accepting excursive occlusal records and duplicating the mandibular movements is a challenge for CAD/CAM technology. Modifying tooth shape using composite resin trial restorations to produce esthetic results and later scanning the modified teeth to create milled crowns is becoming a popular use of the CAD/CAM technology...
May 2016: Journal of Prosthetic Dentistry
M Perez-Davidi
Digital dentistry and digital smile design are both components of modern dentistry. The combination of the two enables the dentist to simulate the desired outcome, share the mock up with the patient and coordinate his or her expectations with the probable esthetic outcome. In this article a case is presented of anterior restorations performed to improve the smile and esthetics of the patient, combining the digital smile design (by Christian Coachman) and the Avatar Digital smile aide of the Cerec SW4 (sirona Germany) software for designing and the MCxI inlab milling unit for the fabrication...
October 2015: Journal of the Israel Dental Association
A Dawood, B Marti Marti, V Sauret-Jackson, A Darwood
3D printing has been hailed as a disruptive technology which will change manufacturing. Used in aerospace, defence, art and design, 3D printing is becoming a subject of great interest in surgery. The technology has a particular resonance with dentistry, and with advances in 3D imaging and modelling technologies such as cone beam computed tomography and intraoral scanning, and with the relatively long history of the use of CAD CAM technologies in dentistry, it will become of increasing importance. Uses of 3D printing include the production of drill guides for dental implants, the production of physical models for prosthodontics, orthodontics and surgery, the manufacture of dental, craniomaxillofacial and orthopaedic implants, and the fabrication of copings and frameworks for implant and dental restorations...
December 2015: British Dental Journal
Franz Sebastian Schwindling, Ulrich Karl Deisenhofer, Monika Porsche, Peter Rammelsberg, Stefanie Kappel, Thomas Stober
The aim of this study was to evaluate a hands-on computer-assisted design/computer-assisted manufacture (CAD/CAM) module in a preclinical dental course in restorative dentistry. A controlled trial was conducted by dividing a class of 56 third-year dental students in Germany into study and control groups; allocation to the two groups depended on student schedules. Prior information about CAD/CAM-based restorations was provided for all students by means of lectures, preparation exercises, and production of gypsum casts of prepared resin teeth...
October 2015: Journal of Dental Education
Felix P Koch, Elisabeth Götze, Vinay V Kumar, Peter Schulz, Stefan Wentaschek, Wilfried Wagner
Large defects of the human face often cause esthetic as well as functional disorders. We present a new technique for reconstruction of the mandible with prosthodontic rehabilitation in a single surgery, using the implant-supported, bar-retained overdenture as an external fixator. A 58-year-old patient presented with a near total defect of the mandible after cancer resection. For rehabilitation, the mandibular condyles were virtually positioned in the centre of the fossae, and four dental implants were planned...
October 2015: Journal of Cranio-maxillo-facial Surgery
T Otto, W H Mörmann
In 55 patients, 25 endocrowns (test) and 40 shoulder crowns (control) were produced chairside in a private practice using the Cerec 3 (CAD/CAM) method and Vita Mark II feldspathic ceramic. The crowns were examined at baseline and after up to 12 years using modified USPHS criteria. The survival estimate was assessed by Kaplan-Meier analysis. The 12 years survival estimate of the shoulder crowns was 95% on molars and 94.7% on premolars. Endocrowns showed 90.5% survival on molars and 75% on premolars. Statistically, the differences between the survival estimates were not significant (P > 0...
2015: International Journal of Computerized Dentistry
Monica A Fernandez, Arthur Nimmo, Linda S Behar-Horenstein
PURPOSE: To survey chairs of prosthodontics or restorative departments and program directors of postdoctoral prosthodontic programs in the United States regarding digital denture fabrication. The key objectives of the survey were to identify the current trends in complete denture fabrication using CAD/CAM technology and to determine how and to what extent this technique is taught and used in U.S. pre- and postdoctoral prosthodontic programs. MATERIALS AND METHODS: An invitation to participate in an online survey was sent to 52 prosthodontics/restorative chairs of U...
January 2016: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
Richard S Callan, Jeril R Cooper, Nancy B Young, Anthony G Mollica, Alan R Furness, Stephen W Looney
The use of computers to aid in instruction and help decrease the subjective component of assessment is steadily increasing. One of the potential barriers to the effective utilization of CAD/CAM technology for assessment purposes is the efficient scanning of the teeth being used for comparison. The purpose of this pilot study was to determine if the use of different typodonts, of the same make and model, has any significant effect on the percent comparison results when using E4D Compare. Tooth #30 was prepared by a faculty member to represent what dental students at Georgia Regents University are taught as the ideal preparation for a full gold crown...
June 2015: Journal of Dental Education
Lissethe Peñate, Juan Basilio, Miguel Roig, Montserrat Mercadé
STATEMENT OF PROBLEM: Prosthodontic treatment sometimes requires a long-term interim fixed dental prosthesis (FDP) until the definitive restoration can be cemented. However, some interim materials are weak and do not have an adequate marginal seal. PURPOSE: The purpose of this study was to compare the marginal fit and fracture strengths of interim FDPs fabricated by using a direct technique with different materials (Structur 3, Trim, and DuraLay) with interim prostheses (Telio CAD) made with a computer-aided design and computer-aided manufacturing (CAD/CAM) system...
August 2015: Journal of Prosthetic Dentistry
Kianoosh Torabi, Ehsan Farjood, Shahram Hamedani
The early computer-aided design/computer-aided manufacturing (CAD/CAM) systems were relied exclusively on subtractive methods. In recent years, additive methods by employing rapid prototyping (RP) have progressed rapidly in various fields of dentistry as they have the potential to overcome known drawbacks of subtractive techniques such as fit problems. RP techniques have been exploited to build complex 3D models in medicine since the 1990s. RP has recently proposed successful applications in various dental fields, such as fabrication of implant surgical guides, frameworks for fixed and removable partial dentures, wax patterns for the dental prosthesis, zirconia prosthesis and molds for metal castings, and maxillofacial prosthesis and finally, complete dentures...
March 2015: Journal of Dentistry
Sheri A Brownstein, Aseel Murad, Ronald J Hunt
With dentistry rapidly evolving as new technologies are developed, this study aimed to identify the penetration of emerging dental technologies into the curricula of U.S. dental schools and to explore whether certain school characteristics affected adoption of these technologies. A 19-question survey was sent to the academic deans of all 62 U.S. dental schools. In addition to questions about characteristics of the school, the survey asked respondents to indicate where in their curricula the technology was incorporated: preclinical didactic, preclinical laboratory, clinical didactic, and/or clinical patient experience...
March 2015: Journal of Dental Education
Amirali Zandinejad, Michael Metz, Paul Stevens, Wei-Shao Lin, Dean Morton
During their education, dental students seek to be involved in comprehensive esthetic treatment for the rehabilitation of lost, damaged, or discolored tooth structure. Due to technological advances and patient exposure to dental advertising, recent dental school graduates can find themselves under great expectations with limited clinical experience. With the implementation of an oral health and rehabilitation department at the University of Louisville Dental School, dental students have the opportunity to plan treatment and treat such patients under the supervision of faculty with advanced training in prosthodontics and restorative dentistry...
April 2015: Journal of Prosthetic Dentistry
R Duane Douglas, Christa D Hopp, Marcus A Augustin
The purpose of this study was to evaluate dental students' perceptions of traditional waxing vs. computer-aided crown design and to determine the effectiveness of either technique through comparative grading of the final products. On one of twoidentical tooth preparations, second-year students at one dental school fabricated a wax pattern for a full contour crown; on the second tooth preparation, the same students designed and fabricated an all-ceramic crown using computer-aided design (CAD) and computer-aided manufacturing (CAM) technology...
December 2014: Journal of Dental Education
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