Comparison of volumetric changes at implant connector among three different types of abutment after cyclic loading

Abstract

The aim of this study was to compare the volumetric change of dental implant among three different types of abutments after cyclic loading.Thirty dental implants (4.1x10 mm., Straumann®) were used .All of them were inserted in acrylic resin block with usual surgical protocol to gain primary stability and be able to retrieve for volumetric measurement later. Ten of each dental implant connected with Titanium abutment (Group1: Variobase abutment Straumann®), Gold abutment (Group2: UCLA abutment Straumann®) and Zirconia abutment (Group 3: Care abutment Straumann®) consecutively. Then all specimen was submitted to cyclic loading (1x106 cycles, axial load, 100N, 15 Hz) at 30oangulated. After loading, the volumetric of the dental implants were measured by true density analyzer (Accu Pyc II).The volumetric changes of dental implants among three abutment types were examined by one-way analysis of variance (ANOVA) followed by Bonferroni post-hoc analysis. A P value <0.05 was considered statistically significant. Results showed the dental implant for group 3( mean ± SD; 17.3302±0.5560) was significantly different from Group 1 ( mean ± SD 9.3982±0.2128) and group 2 ( mean ± SD; 7.6164±1.9165) .In summary, dental implants with zirconia abutments showed the greater of volumetric loss than the other groups.