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KMID : 0362420080460020209
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Journal of Korean Academy of Prosthodontics
2008 Volume.46 No. 2 p.209 ~ p.216
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THE INFLUENCE OF ABUTMENT SCREW TIGHTENING TIMING AND DLC COATING OF CONICAL CONNECTION IMPLANT SYSTEM
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Kim Ki-Hong
Koak Jai-Young
Heo Seong-Joo
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Abstract
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Statement of problem: It is difficult about assessing the loosening tendency of conical connection type implant after cyclic loading with diamond like carbon coating one-piece abutments, and also about the retightening effect.
Purpose: This study was performed to investigate the influence of one-piece abutment screw retightening after 5.0×10 4 cyclic loading and Diamond like coating
Material and methods: Thirty two ITI implant were divided to 4 groups. Group 1,3-titanium abutment, group 2,4 - diamond like carbon coated abutment. Group 1,2 - 20.0×10 4 cyclic loading after 5.0×10 4 cyclic loading, Group 3,4- after 20.0×10 4 Cyclic loading. After cyclic loading, periotest values were taken and removal torque values of abutments were measured with a digital torque gauge.
Results: 1. The removal torque of group 2 after 5.0×10 4 cyclic loading is slightly greater than the other groups but not significantly higher than others (P>0.05). 2. The final removal torque values after 20.0×10 4 cyclic loading of group 1 is bigger than group 3, and group 2 is bigger than group 4, but not significantly higher (P>0.05). 3. The final removal torque values after 20.0×10 4 cyclic loading of all groups are not significantly different (P>0.05).
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KEYWORD
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Conical connection, One-piece abutment, Diamond-like coating, Cyclic loading, Periotest
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