Influence of Liquid Lubrication on the Screw-Joint Stability of Y-TZP Implant Abutment Systems

Author(s)

Basilio, Mariana de Almeida ^[1] ; Abi-Rached, Filipe de Oliveira ^[1] ; Butignon, Luis Eduardo ^[2] ; Arioli Filho, Joao Neudenir ^[1]

Affiliation

^[1] UNESP Univ Estadual Paulista, Dept Dent Mat & Prosthodont, Araraquara Sch Dent, Sao Paulo - Brazil

^[2] PI Branemark Inst, Dept Prosthodont, Sao Paulo - Brazil

• Document type: Journal article
• Source: JOURNAL OF PROSTHODONTICS-IMPLANT ESTHETIC AND RECONSTRUCTIVE DENTISTRY; v. 26, n. 8, p. 656-658, DEC 2017.
• Web of Science Citations: 3

Abstract

PurposeTo evaluate the effectiveness of abutment screws coated with liquid Vaseline on the screw-joint stability of yttria-stabilized tetragonal zirconia (Y-TZP) abutment systems. Materials and MethodsForty Y-TZP prefabricated abutments, 20 Neodent and 20 Bionnovation, were tightened to 20 Ncm on their respective external hexagon implants, and divided into four groups (n = 10) according to the screws: coated with Vaseline or uncoated. The removal torque (RT) value of the abutment screw was measured before and after loading. A cyclic loading (0.5 x 10(6) cycles; 15 Hz) between 11 and 211 N was applied. Means were compared using a repeated-measures ANOVA ( = 0.05). ResultsThere was no significant difference between coated and uncoated screws (p = 0.822). Significant differences were found between the abutment systems (p < 0.001). There was a significant effect of cyclic loading (p < 0.001). ConclusionsCoated and uncoated screws presented similar effectiveness in maintaining preload. Clinical RelevanceThe liquid lubricant used in this study does not influence the stability of Y-TZP single-implant restorations. (AU)

• FAPESP's process: 10/06651-5 - Comparative analysis of the stability of the joint bolted in zirconia abutments over implants after cyclic loading
• Grantee: João Neudenir Arioli Filho
• Support Opportunities: Regular Research Grants