The Effect of CAD/CAM Crown Material and Cement Type on Retention to Implant Abutments

Author(s)

de Oliveira Lopes, Adolfo Coelho ^[1] ; Machado, Camila Moreira ^[1] ; Bonjardim, Leonardo Rigoldi ^[2] ; Pedroso Bergamo, Edmara Tatiely ^[3] ; Ramalho, Ilana Santos ^[1] ; Witek, Lukasz ^[4] ; Coelho, Paulo Guilherme ^{[4, 5, 6]} ; Bonfante, Estevam Augusto ^[1]

Affiliation

^[1] Univ Sao Paulo, Bauru Sch Dent, Dept Prosthodont & Periodontol, Alameda Octavio Pinheiro Brisola 9-75, BR-17012901 Bauru - Brazil

^[2] Univ Sao Paulo, Dept Biol Sci, Bauru Sch Dent, Bauru - Brazil

^[3] Univ Estadual Campinas, Piracicaba Dent Sch, Piracicaba - Brazil

^[4] NYU, Dept Biomat & Biomimet, New York, NY - USA

^[5] NYU, Sch Med, Hansjorg Wyss Dept Plast Surg, New York, NY - USA

^[6] NYU, Dept Mech & Aerosp Engn, Tandon Sch Engn, New York, NY - USA

• Document type: Journal article
• Source: JOURNAL OF PROSTHODONTICS-IMPLANT ESTHETIC AND RECONSTRUCTIVE DENTISTRY; v. 28, n. 2, p. E552-E556, FEB 2019.
• Web of Science Citations: 0

Abstract

Purpose To evaluate the pullout resistance of CAD/CAM implant-supported crowns cemented with provisional and definitive cements on Ti-base implant abutments. Materials and Methods Sixty crowns were milled for use in Ti-base implant abutments and divided (n = 15/group) according to material, as follows: (a) {[}Pr] Temporary acrylic resin; (b) {[}Co-Cr] Cobalt-Chromium alloy; (c) {[}Zr] polycrystalline zirconia; and (d) {[}Ti] titanium. The cementation was performed with RelyX Temp NE (RxT) cement or RelyX U200 self-etching resin cement, under a 50 N (5 kg) load for 10 minutes. Twenty-four hours after cementation, the crowns were subjected to the pullout test in a universal test machine, at a 1.0 mm/min crosshead speed. The tests were performed first without cement to evaluate frictional resistance (Baseline), then with provisional cement (RelyX Temp NE without cement again (Baseline After RxT), and finally with resin cement (U200). The results were analyzed by ANOVA and Tukey test (p < 0.05). Results Data evaluation as a function of cement type demonstrated the superiority of resin-based cements relative to provisional and baseline groups (p < 0.01). While Co-Cr crowns presented the highest pullout strength values, Pr showed the lowest values (data collapsed over cement) (p < 0.001). Retentiveness data as a function of both factors demonstrated similar pullout resistance between groups without cement (p < 0.001), except Zr baseline. Also, Co-Cr presented higher pullout strength compared to other materials. Conclusions Self-adhesive resin cement exhibited superior retention compared to temporary cement, regardless of crown material. Co-Cr and titanium presented higher levels of retention to Ti-base abutment after being cemented. (AU)

• FAPESP's process: 12/19078-7 - Development and processing of Al2O3-ZrO2 translucent composite for CAD/CAM monolithic prostheses: the effect of aging on biaxial flexural strength
• Grantee: Estevam Augusto Bonfante
• Support Opportunities: Research Grants - Young Investigators Grants
• FAPESP's process: 16/18818-8 - Multi-User Equipment approved in grant 2012/19078-7: ElectroPuls E3000 Linear-Torsion All-Electric dynamic test instrument package
• Grantee: Estevam Augusto Bonfante
• Support Opportunities: Multi-user Equipment Program
• FAPESP's process: 17/19362-0 - DEVELOPMENT, MECHANICAL AND OPTICAL CHARACTERIZATION OF 80% AL2O3 AND 20% ZRO2 ZTA COMPOSITES FOR CAD/CAM PROSTHESES
• Grantee: Adolfo Coelho de Oliveira Lopes
• Support Opportunities: Scholarships abroad - Research Internship - Master's degree
• FAPESP's process: 16/17793-1 - Development and mechanical and optical characterization of 80% Al2O3 and 20% ZrO2 translucent composites for CAD/CAM monolithic prostheses
• Grantee: Adolfo Coelho de Oliveira Lopes
• Support Opportunities: Scholarships in Brazil - Master