Proceedings of the KSME Conference (대한기계학회:학술대회논문집)
- 2000.04a
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- Pages.375-380
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- 2000
Effects of locking system of pedicle screw on the fatigue loading
척추경 나사못 고정시스템의 피로하중 영향
Abstract
The purpose of this study is to verify the relations with the fatigue life and stress distribution on the screw thread for thoracic and lumbar spine. These screws are now developed for Korean in this research group. The fatigue life of single screw was found longer than that of up-left-screw, but shorter than that of up-right-screw. The fatigue life of screw used was associated with the angie between bending and thread direction. In the case of upper left and right screw were fractured in the region of one pitch and two pitch of the thread valley from the shank of pedicle screw, respectively.
Keywords
- Pedicle Screw;
- One Level System;
- Locking System;
- Fatigue Loading;
- Bending Direction;
- Thread Direction