scholarly journals In vitro evaluation of marginal and internal adaptation of three-unit fixed dental prostheses produced by stereolithography

2014 ◽  
Vol 33 (4) ◽  
pp. 504-509 ◽  
Author(s):  
Ki-Baek KIM ◽  
Jae-Hong KIM ◽  
Woong-Chul KIM ◽  
Ji-Hwan KIM
Keyword(s):  
In Vitro Evaluation ◽  
Dental Prostheses ◽  
Fixed Dental Prostheses ◽  
Internal Adaptation

scholarly journals Fracture Resistance of CAD/CAM Versus Traditional Interim Fixed Dental Prostheses

2018 ◽  
Vol 55 (3) ◽  
pp. 361-363
Author(s):  
Daniel Alexandru Pop ◽  
R. Malaescu ◽  
Liviu Marsavina ◽  
Tiberiu Hosszu ◽  
Raul Rotar ◽  
...  
Keyword(s):  
Testing Machine ◽  
In Vitro Study ◽  
Maximum Load ◽  
Fracture Load ◽  
Digital Design ◽  
Computer Assisted ◽  
Dental Prostheses ◽  
Cad Cam ◽  
Fixed Dental Prostheses

The aim of this in vitro study is to compare the load-to-fracture performance of polymethyl methacrylates (PMMA) provisional restorations manufactured with a traditional laboratory technique in comparison to a computer-assisted design and computer-assisted manufacturing (CAD-CAM) technique. Five interim three-unit fixed dental prostheses were fabricated with the conventional indirect technique, on a standard typodont. The same model was scanned with an intraoral scanner and the digital design of identical fixed dental prostheses was made. Then other five interim three-unit fixed dental prostheses were milled from PMMA CAD/CAM blocks with an in office milling machine. All specimens were tested for flexural strength in a universal testing machine, and the maximum load to fracture was measured. For the conventional provisional restorations, the load to fracture was 121.16 � 24.6, in comparison to CAD/CAM interim restorations, for which the load to fracture was 728.88 � 228.7. Within the limitations of this study, one can conclude that CAD/CAM provisional restorations present a higher fracture load than the conventional manufactured interim restorations.

In vitro comparison of trueness of 10 intraoral scanners for implant-supported complete-arch fixed dental prostheses

2020 ◽  
Vol 124 (6) ◽  
pp. 755-760 ◽  
Author(s):  
Caglar Bilmenoglu ◽  
Altug Cilingir ◽  
Onur Geckili ◽  
Hakan Bilhan ◽  
Tayfun Bilgin
Keyword(s):  
Dental Prostheses ◽  
Fixed Dental Prostheses ◽  
In Vitro Comparison

scholarly journals In vitro evaluation of marginal and internal adaptation of class II CAD/CAM ceramic restorations with different resinous bases and interface treatments

2015 ◽  
Vol 19 (9) ◽  
pp. 2167-2177 ◽  
Author(s):  
María José Sandoval ◽  
Giovanni Tommaso Rocca ◽  
Ivo Krejci ◽  
Michael Mandikos ◽  
Didier Dietschi
Keyword(s):  
Class Ii ◽  
In Vitro Evaluation ◽  
Cad Cam ◽  
Internal Adaptation ◽  
Ceramic Restorations

scholarly journals Does Printing Orientation Matter? In-Vitro Fracture Strength of Temporary Fixed Dental Prostheses after a 1-Year Simulation in the Artificial Mouth

Materials ◽  
2021 ◽  
Vol 14 (2) ◽  
pp. 259
Author(s):  
Julian Nold ◽  
Christian Wesemann ◽  
Laura Rieg ◽  
Lara Binder ◽  
Siegbert Witkowski ◽  
...  
Keyword(s):  
Additive Manufacturing ◽  
Fracture Strength ◽  
Computer Aided Design ◽  
In Vitro Study ◽  
Bending Test ◽  
Dental Prostheses ◽  
Computer Aided ◽  
Subtractive Manufacturing ◽  
Fixed Dental Prostheses

Computer-aided design and computer-aided manufacturing (CAD–CAM) enable subtractive or additive fabrication of temporary fixed dental prostheses (FDPs). The present in-vitro study aimed to compare the fracture resistance of both milled and additive manufactured three-unit FDPs and bar-shaped, ISO-conform specimens. Polymethylmethacrylate was used for subtractive manufacturing and a light-curing resin for additive manufacturing. Three (bars) and four (FDPs) different printing orientations were evaluated. All bars (n = 32) were subjected to a three-point bending test after 24 h of water storage. Half of the 80 FDPs were dynamically loaded (250,000 cycles, 98 N) with simultaneous hydrothermal cycling. Non-aged (n = 40) and surviving FDPs (n = 11) were subjected to static loading until fracture. Regarding the bar-shaped specimens, the milled group showed the highest flexural strength (114 ± 10 MPa, p = 0.001), followed by the vertically printed group (97 ± 10 MPa, p < 0.007). Subtractive manufactured FDPs revealed the highest fracture strength (1060 ± 89 N) with all specimens surviving dynamic loading. During artificial aging, 29 of 32 printed specimens failed. The present findings indicate that both printing orientation and aging affect the strength of additive manufactured specimens. The used resin and settings cannot be recommended for additive manufacturing of long-term temporary three-unit FDPs.

scholarly journals In Vitro Simulation of Dental Implant Bridges Removal: Influence of Luting Agent and Abutments Geometry on Retrievability

Materials ◽  
2020 ◽  
Vol 13 (12) ◽  
pp. 2797
Author(s):  
Andrea T. Lugas ◽  
Mara Terzini ◽  
Elisabetta M. Zanetti ◽  
Gianmario Schierano ◽  
Carlo Manzella ◽  
...  
Keyword(s):  
Clear Correlation ◽  
Dental Prostheses ◽  
Implant Complications ◽  
Luting Agent ◽  
Dental Practitioners ◽  
Impulsive Forces ◽  
Fixed Dental Prostheses ◽  
Clinical Conditions ◽  
Bridge Models

Implant fixed dental prostheses are widely used for the treatment of edentulism, often preferred over the screw-retained ones. However, one of the main features of an implant-supported prosthesis is retrievability, which could be necessary in the case of implant complications. In this study, the retrievability of implant-fixed dental prostheses was investigated considering two of the main factors dental practitioners have to deal with: the abutments geometry and the luting agent. Impulsive forces were applied to dental bridge models to simulate crowns’ retrievability in clinical conditions. The number of impulses and the impulsive force delivered during each test were recorded and used as retrievability indexes. One-hundred-and-five tests were conducted on 21 combinations of bridges and luting agents, and a Kruskal-Wallis test was performed on the results. The abutment geometry significantly influenced the number of impulses needed for retrieval (p < 0.05), and a cement-dependent trend was observed as well. On the other hand, the forces measured during tests showed no clear correlation with bridge retrievability. The best retrievability was obtained with long, slightly tapered abutments and a temporary luting agent.

In vitro precision of fit of computer-aided designed and computer-aided manufactured titanium screw-retained fixed dental prostheses before and after ceramic veneering

2013 ◽  
Vol 26 (1) ◽  
pp. 44-49 ◽  
Author(s):  
Joannis Katsoulis ◽  
Regina Mericske-Stern ◽  
Norbert Enkling ◽  
Konstantinos Katsoulis ◽  
Markus B. Blatz
Keyword(s):  
Titanium Screw ◽  
Dental Prostheses ◽  
Computer Aided ◽  
Before And After ◽  
Fixed Dental Prostheses
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