Advanced search
Start date
Betweenand
Related content
(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Biomechanical behavior of CAD/CAM cobalt-chromium and zirconia full-arch fixed prostheses

Full text
Author(s):
Barbin, Thais [1] ; Silva, Leticia Del Rio [1] ; Veloso, Daniele Valente [1] ; Borges, Guilherme Almeida [1] ; Camacho Presotto, Anna Gabriella [1] ; Ricardo Barao, Valentim Adelino [1] ; Groppo, Francisco Carlos [2] ; Mesquita, Marcelo Ferraz [1]
Total Authors: 8
Affiliation:
[1] Univ Estadual Campinas, Piracicaba Dent Sch, Dept Prosthodont & Periodontol, Piracicaba - Brazil
[2] Univ Estadual Campinas, Piracicaba Dent Sch, Dept Physiol Sci, Piracicaba - Brazil
Total Affiliations: 2
Document type: Journal article
Source: JOURNAL OF ADVANCED PROSTHODONTICS; v. 12, n. 6, p. 329-337, DEC 2020.
Web of Science Citations: 0
Abstract

PURPOSE. To verify the influence of computer-aided design/computer-aided manufacturing (CAD/CAM) implant-supported prostheses manufactured with cobalt-chromium (Co-Cr) and zirconia (Zr), and whether ceramic application, spark erosion, and simulation of masticatory cycles modify biomechanical parameters (marginal fit, screw-loosening torque, and strain) on the implant-supported system. MATERIALS AND METHODS. Ten full-arch fixed frameworks were manufactured by a CAD/CAM milling system with Co-Cr and Zr (n=5/group). The marginal fit between the abutment and frameworks was measured as stated by single-screw test. Screw-loosening torque evaluated screw stability, and strain analysis was explored on the implant-supported system. All analyses were performed at 3 distinct times: after framework manufacturing; after ceramic application in both materials' frameworks; and after the spark erosion in Co-Cr frameworks. Afterward, stability analysis was re-evaluated after 106 mechanical cycles (2 Hz/150-N) for both materials. Statistical analyses were performed by Kruskal-Wallis and Dunn tests (alpha=.05). RESULTS. No difference between the two materials was found for marginal fit, screw-loosening torque, and strain after framework manufacturing (P>.05). Ceramic application did not affect the variables (P>.05). Spark erosion optimized marginal fit and strain medians for Co-Cr frameworks (P<.05). Screw-loosening torque was significantly reduced by masticatory simulation (P<.05) regardless of the framework materials. CONCLUSION. Co-Cr and Zr frameworks presented similar biomechanical behavior. Ceramic application had no effect on the biomechanical behavior of either material. Spark erosion was an effective technique to improve Co-Cr biomechanical behavior on the implant-supported system. Screw-loosening torque was reduced for both materials after masticatory simulation. (AU)

FAPESP's process: 17/16303-3 - Comparative study of manufacturing techniques of maxillary complete-arch prosthesis: planning, materials, marginal misfit, loosening torque, ceramic coverage, mechanical cycling and stress distribution
Grantee:Marcelo Ferraz Mesquita
Support Opportunities: Regular Research Grants
FAPESP's process: 17/15297-0 - Comparative study of manufacturing techniques of maxillary complete-arch prosthesis (All-on-4): planning, materials, marginal misfit, loosening torque, ceramic coverage, mechanical cycling and stress distribution
Grantee:Thaís Barbin
Support Opportunities: Scholarships in Brazil - Master