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KMID : 1004520100260020097
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Journal of Dental Rehabilitation and Applied Science
2010 Volume.26 No. 2 p.97 ~ p.109
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Influence of Implant Abutment Systems on Detorque Value and Screw Joint Stability
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Bae Byung-Ryong
Choi Yu-Sung
Cho In-Ho
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Abstract
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Purpose: This study was designed to evaluate the influence of implant abutment materials on detorque value and screw joint stability before and after dynamic fatigue test.
Materials and Methods : The external hexagonal fixture and three different groups of abutment (titanium abutments, zirconia abutments, and UCLA abutments) were used. The detorque value before loading and after loading (cyclic loading up to 105 cycles) of the abutment screw were measured.
Result:
1. There was no significant difference in detorque value before loading among the each group.
2. There was no significant difference in detorque value after loading among the each group.
3. Detorque values before and after cyclic loading in each group were not significantly different.
4. There was no significant difference in loss percentage of removal torque before loading among the each group.
5. There was no significant difference in loss percentage of removal torque after loading among the each group.
6. There was no significant difference in loss percentage of removal torque according to loading among the each group.
Conclusion:Short term screw loosening of three types of abutment was not significantly different. When bite force was applied, there was no significant difference in screw loosening between before loading and after loading.
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KEYWORD
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Screw loosening, Zirconia, Dynamic loading, Torque, UCLA, Titanium
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