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KMID : 1023820140060010035
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The Journal of Advanced Prosthodontics
2014 Volume.6 No. 1 p.35 ~ p.38
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Correlation between microleakage and screw loosening at implant-abutment connection
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Cem Sahin
Simel Ayyildiz
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Abstract
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PURPOSE : This study aimed to evaluate the correlation between microleakage and screw loosening at different types of implant-abutment connections and/or geometries measuring the torque values before and after the leakage tests.
MATERIALS AND METHODS : Three different abutment types (Intenal hex titanium, internal hex zirconium, morse tapered titaniuım) with different geometries were connected to its own implant fixture. All the abutments were tightened with a standard torque value then the composition was connected to the modified fluid filtration system. After the measurements of leakage removal torque values were re-measured. Kruskal-wallis test was performed for non-parametric and one-way ANOVA was performed for parametric data. The correlation was evaluated using Spearman Correlation Test (α=0.05).
RESULTS : Significantly higher microleakage was found at the connection of implant-internal hex zirconium abutment. Observed mean torque value loss was also significantly higher than other connection geometries. Spearman tests revealed a significant correlation between microleakage and screw loosening.
CONCLUSION : Microleakage may provoke screw loosening. Removing torque values rationally decrease with the increase of microleakage.
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KEYWORD
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Microleakage, Implant-abutment connection, Screw loosening
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