Correlation between microleakage and screw loosening at implant-abutment connection.
- Author:
Cem SAHIN
1
;
Simel AYYILDIZ
Author Information
- Publication Type:Original Article
- Keywords: Microleakage; Implant-abutment connection; Screw loosening
- MeSH: Filtration; Titanium; Torque; Zirconium
- From:The Journal of Advanced Prosthodontics 2014;6(1):35-38
- CountryRepublic of Korea
- Language:English
- Abstract: 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 titaniuim) 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 (alpha=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.
