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KMID : 0988720090250020157
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Journal of the Korean Academy of Stomatognathic Function and occlusion
2009 Volume.25 No. 2 p.157 ~ p.169
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Influence of the Dental Implant Abutment Screw Coating Materials on Joint Stability
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Lim Hyun-Phil
Park Young-Sun
Vang Mong-Sook
Yang Hong-So
Park Sang-Won
Yoon Suk-Ja
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Abstract
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The aim of this study was to evaluate effect of implant abutment screw coating treatment on joint stability, investigating mechanical properties of these. For this study used ExFeel® external hexed implant system and 15 ㎜ × 1 ㎜ discs . Experimental group was 1 ㎛ TiN, TiCN, TiC coated abutment screws and discs .To know mechanical property, i evaluated adhesion strength, surface hardness, using disc, corrosion test using screw. The results were as follows : rotation angle of coated screws increased than that of non-coated screw because of lower friction coefficient, especially TiC coated screw group had the largest value, but removal torque decreased in all coated screws (p<0.05). Torque loss before and after fatigue test was the smallest in TiC-coated screws, and the largest in non-coated screws (p<0.05), and there was no statistically significant difference between dry condition and wet condition of screws because of higher surface hardness and lower friction coefficient. From the above results, TiN, TiCN, TiC coating group had high abrasion resistance, especially TiC coated group which had low torque-consuming, high rotation angle as low friction coefficient will be considered to influence on implant abutment screw joint stability positively.
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KEYWORD
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joint stability, removal torque, rotation angle, screw loosening
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