Journal of Isfahan Dental School

The Effect of Cooling on the Loosening of the Abutment Screw in Tissue Level Implants with Internal Hex

Document Type : مقاله‌های پژوهشی

Authors

1 PhD, Student Research Committee, School of Dentistry, Isfahan University of Medical Sciences, Isfahan, Iran

2 Assistant Professor, Dental Implants Research Center, Dental Prosthodontics Department, School of Dentistry, Isfahan University of Medical Sciences, Isfahan, Iran

3 Assistant Professor, Dental Materials Research Center, Department of Prosthodontics, School of Dentistry, Isfahan University of Medical Sciences, Isfahan, Iran

4 Postgraduate Student, Dental Students’ Research Committee, Department of Prosthodontics, School of Dentistry, Isfahan University of Medical Sciences, Isfahan, Iran

Abstract

Abstract
Introduction: Abutment screw loosening is one of the most common problems and complications after dental implant treatment, therefore, in order to reduce this complication, providing a logical solution with the least interference with the treatment can be of great importance. For this purpose, this study aims to investigate the effect of cold on loosening abutment screw in implants with internal hex was performed in different tissue-level implant systems.
Materials & Methods: This study examined tissue-level implants in terms of the amount of abutment screw loosening due to cold. The implants were divided into three groups of 10 including DIO (Korean), ITI (Swiss) and Zimmer (American) implants. Abutment screw of 5 samples were torqued with endo cold spray and 5 samples without cold. Then all the abutments were placed in a thermocycler with 5000 Cycles and the amount of detorque of these groups was measured. After collecting the data, using the Covariance test, the results were analyzed at the error level of 0.05.
Results: Detorque rate of implants under the effect of cold was 25.78 ± 2.19 N/cm and the group without cold was 25.40 ± 2.08 N/cm. Also, a significant difference was observed between DIO and ITI implants before cooling and after cooling in terms of the amount of detorque (p value < 0.05), but the amount of detorque before and after applying cold in the Zimmer implant was not significantly different (0.05).
Conclusion: Cold is an effective factor in increasing the detorque force of screw abutments. But the type of implant was also an effective factor in the effect of cold on the detorque required to loosen the abutment screw, and the highest amount of detorque after applying cold was related to ITI implants and the lowest amount of detorque was related to Zimmer implant.
Keywords: Abutment; Screw; Dental implants; Temperature

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Journal of Isfahan Dental School
Volume 20, Issue 2 - Serial Number 2
July 2024
Pages 69-76