scholarly journals Fit accuracy of removable partial denture metal frameworks produced by CAD-CAM – a clinical study

2021 ◽  
Vol 62 (4) ◽  
Author(s):  
Pedro Conceição ◽  
◽  
Margarida Franco ◽  
Nuno Alves ◽  
Jaime Portugal ◽  
...  
Keyword(s):  
Clinical Study ◽  
Wilcoxon Test ◽  
Control Group ◽  
Dental Arch ◽  
Volume Data ◽  
Cobalt Chromium ◽  
Micro Computed Tomography ◽  
Removable Partial Denture ◽  
Partial Denture ◽  
Cad Cam

Objectives: To assess the effect of a CAD-CAM protocol fabrication on the clinical fit accuracy of removable partial denture metal frameworks to abutment teeth. Methods: Fifteen patients with partial edentulism were selected to participate in this clinical study, and twenty dental arch rehabilitations were planned. For each dental arch (n=20), two cobalt-chromium frameworks were produced through two protocols: CAD-CAM production (experimental group); and conventional lost-wax casting technique (control group). Clinical fit accuracy was assessed using an indirect quantitative method to evaluate the gap between the framework occlusal rest and the corresponding rest seat. A silicone mold of that gap was obtained, digitized, and analyzed by micro-computed tomography. The two silicone molds obtained for each occlusal rest were overlapped and evaluated for thickness and volume. Data were analyzed with the paired t test for silicone thickness results and the Wilcoxon test for silicone volume results (α= 0.05). Results: Considering the two dependent variables under study, no statistically significant (p=0.441 for silicone thickness and p=0.204 for silicone volume) differences were found between groups. Conclusions: The results of this study suggest that the CAD-CAM protocol applied is a viable method for the production of removable partial denture metal frameworks. (Rev Port Estomatol Med Dent Cir Maxilofac. 2021;62

Retentive Forces of Removable Partial Denture Clasp Assemblies Made From Polyaryletherketone and Cobalt‐Chromium: A Comparative Study

2021 ◽  
Author(s):  
Frank I. Gentz ◽  
Daniel I. Brooks ◽  
Peter C. Liacouras ◽  
Anton Petrich ◽  
Christopher M. Hamlin ◽  
...  
Keyword(s):  
Comparative Study ◽  
Cobalt Chromium ◽  
Removable Partial Denture ◽  
Partial Denture

scholarly journals Fabrication of Zirconia Abutment Crown and Clasp Under Existing Removable Partial Denture Using CAD/CAM Technology

2021 ◽  
Vol Volume 13 ◽  
pp. 421-427
Author(s):  
Akinori Tasaka ◽  
Takahiro Shimizu ◽  
Takeshi Hirabayashi ◽  
Shuichiro Yamashita
Keyword(s):  
Removable Partial Denture ◽  
Partial Denture ◽  
Cad Cam

scholarly journals Evaluation of the behavior system locator associated with a removable partial denture, finite element analysis

2018 ◽  
Vol 25 (2) ◽  
pp. 10
Author(s):  
Medardo Alexander Arenas-Chavarria ◽  
Samuel David Giraldo-Gómez ◽  
Federico Latorre-Correa ◽  
Junes Abdul Villarraga-Ossa
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Permanent Deformation ◽  
Vertical Direction ◽  
Cobalt Chromium ◽  
Removable Partial Denture ◽  
Element Analysis ◽  
Partial Denture ◽  
Solid Works ◽  
Von Mises

Aim: The purpose of this research was to evaluate the behavior of the system locator settings associated with distal extension removable partial denture lower (PPR) by finite element analysis (FEA). Materials and Methods: A Class II Kennedy 3D model using a CAD software Solid Works 2010 (SolidWorks Corp., Concord, MA, USA), and subsequently processed and analyzed by ANSYS Software version Model 14. One (1) was designed implant Tapered Screw -Vent® (ref TSVB10 Zimmer Dental-Carlsbad,CA,USA.) length x 10mm diameter 3.7mm with a 3.5mm platform, internal hexagon with its respective screw fixation; this was located at the tooth 37 as a rear pillar of a PPR, whose major connector was a lingual bar casting (alloy cobalt chromium), based combined (metal/ acrylic) with teeth to replace (37, 36 and 35). Efforts were evaluated von Mises in a 400N load. This analysis allowed assessing the performance of various prosthetic structures modeled and generated effects on bone-implant interface. Results: Differences between the values von Mises in all structures and loads were observed before there was no permanent deformation in any of them. Structures such as bone showed in normal values microstrain. Conclusions: The behavior of the PPRimplant connection, showed a favorable distribution efforts by using a PPR, subjecting it to load in the vertical direction.

Fracture resistance of cingulum rest seats in CAD-CAM tooth-colored crowns for removable partial denture abutments

2019 ◽  
Vol 121 (5) ◽  
pp. 828-835 ◽  
Author(s):  
Joshua A. Manchester ◽  
Kwok-Hung Chung ◽  
James S. Brudvik ◽  
Van Ramos ◽  
Yen-Wei Chen
Keyword(s):  
Fracture Resistance ◽  
Removable Partial Denture ◽  
Partial Denture ◽  
Cad Cam

scholarly journals Finite element analysis in defining the optimal shape and safety factor of retentive clasp arms of removable partial denture

2013 ◽  
Vol 70 (11) ◽  
pp. 999-1005
Author(s):  
Miodrag Scepanovic ◽  
Ljiljana Tihacek-Sojic ◽  
Milan Tasic ◽  
Radivoje Mitrovic ◽  
Aleksandar Todorovic ◽  
...  
Keyword(s):  
Stress Distribution ◽  
Safety Factor ◽  
Computer Aided Design ◽  
Pure Titanium ◽  
Commercially Pure Titanium ◽  
Cobalt Chromium ◽  
Removable Partial Denture ◽  
Cocrmo Alloy ◽  
Partial Denture ◽  
Cocrmo Alloys

Bacground/Aim. Retentive force of removable partial denture (RPD) directly depends on elastic force of stretched retentive clasp arms (RCAs). During deflection RCA must have even stress distribution. Safety factor is the concept which can be applied in estimating durability and functionality of RCAs. This study was based on analyzing properties of clasps designed by conventional clasp wax profiles and defining the optimal shapes of RCAs for stress distribution and safety factor aspects. Methods. Computer-aided-design (CAD) models of RCAs with simulated properties of materials used for fabrication of RPD cobalt-chromium-molybdenum (CoCrMo) alloy, commercially pure titanium (CPTi) and polyacetale were analyzed. Results. The research showed that geometrics of Rapidflex profiles from the BIOS concept are defined for designing and modeling RCAs from CoCrMo alloys. I-Bar and Bonihard clasps made from CPTi might have the same design as Co- CrMo clasp only by safety factor aspect, but it is obvious that CPTi are much more flexible, so their shape must be more massive. Polyacetale clasps should not be fabricated by BIOS concept for CoCrMo alloy. A proof for that is the low value of safety factor. Conclusion. The BIOS concept should be used only for RCAs made of CoCrMo alloy and different wax profiles should be used for fabricating clasps of other investigated materials. The contribution of this study may be the improvement of present systems for defining the clasps shapes made from CoCrMo alloys. The more significant application is possibility of creating new concepts in defining shapes of RCA made from CPTi and polyacetale.

Fabrication of an all-ceramic abutment crown under an existing removable partial denture using CAD/CAM technology

2007 ◽  
Vol 98 (6) ◽  
pp. 478-482 ◽  
Author(s):  
Baldwin W. Marchack ◽  
Linda B. Chen ◽  
Christopher B. Marchack ◽  
Yukiko Futatsuki
Keyword(s):  
Removable Partial Denture ◽  
Partial Denture ◽  
All Ceramic ◽  
Cad Cam
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