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Influence of Liquid Lubrication on the Screw‐Joint Stability of Y‐TZP Implant Abutment Systems
Author(s) -
Basílio Mariana de Almeida,
AbiRached Filipe de Oliveira,
Butig Luis Eduardo,
Arioli Filho João Neudenir
Publication year - 2017
Publication title -
journal of prosthodontics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.902
H-Index - 60
eISSN - 1532-849X
pISSN - 1059-941X
DOI - 10.1111/jopr.12456
Subject(s) - lubrication , abutment , materials science , joint (building) , implant , composite material , engineering , structural engineering , medicine , surgery
Purpose To 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 Methods Forty 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 × 10 6 cycles; 15 Hz) between 11 and 211 N was applied. Means were compared using a repeated‐measures ANOVA (α = 0.05). Results There 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). Conclusions Coated and uncoated screws presented similar effectiveness in maintaining preload. Clinical Relevance The liquid lubricant used in this study does not influence the stability of Y‐TZP single‐implant restorations.