Study of Screw Loosening in Abutment Subject to Occlusal Loading

E. Hsung Cheng; Ming Jer Lin; Sheng Yan Shiu; Tung Lin Tsai; Yi Chin Chen

doi:10.4028/www.scientific.net/AMR.415-417.2166

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 415-417Study of Screw Loosening in Abutment Subject to...

Study of Screw Loosening in Abutment Subject to Occlusal Loading

Abstract:

Loosening of screw of the abutment on a dental implant can result in a failure for the prosthesis. The purpose of this study is to understand the change at the joint between the implant and abutment after being subjected to a repeated force. The investigated parameters include loss of torque and shift of abutment against implant. The specimen for this study is IM12 of Metal Industries Research & Development Centre (MIRDC). Implant is embedded in cylindrical resin. Abutment is then tightened on it with a torque of 35 N-cm. A mushroom-shaped crown is placed on top of the abutment. To simulate occlusal loading, an MTS machine is used with a 300N load at 1 Hz for 50,000 cycles. When 10,000 and 25,000 cycles are reached, specimens are checked for any rotation. Finally loss of torque is measured. No shifts of angle and no significant loss of torque are observed in 5 tested specimens.

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Periodical:

Advanced Materials Research (Volumes 415-417)

Pages:

2166-2171

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.415-417.2166

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Online since:

December 2011

Authors:

E. Hsung Cheng, Ming Jer Lin, Sheng Yan Shiu, Tung Lin Tsai, Yi Chin Chen

Keywords:

Abutment, Dental Implant, Screw Loosening

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