The Use of Special Washers in Bone Plates for Improved Impact-Absorbing Characteristics

충격흡수 특성의 향상을 위하 내고정용 특수 와셔에 관한 연구

  • Published : 1995.12.01

Abstract

Unlike the usual bone plate and screw fracture fixation, an improved plate fixation method, which can transfer gradually physiological load to bones, is described. The key feature of the present method is to use washers between the plate and the screw. Bio-absorbable materials or non-ferrous materials with good damping characteristics are used to manufacture the washers. The purpose of this paper is to discuss potential advantages of the proposed method, and to show experimentally its improved impact-absorbing characteristics. Vibration experiments are carried out for pig femurs and cow tibias with and without the proposed washers. This experiments show that the washers can drop the first peak value suite substantially in the FRF plots. Although in-vivo experiments have not been conducted, the present fixation method appears to be a simple and effective alternative to the presently used method.

본 논문에서는 골절 치료에 사용되고 있는 기존의 금속판과 나사고정 장치를 개선하여, 뼈에 점진적인 생리하중을 가할 수 있도록 고안된 내고정 장치를 살펴보았다. 이 장치는 골절판과 나사를 결합할 때, 그 사이에 생분해성 재질이나 기타 댐핑 특성이 우수한 재질의 와셔를 삽입하는 것을 그 특징으로 한다. 본 논문에서는 주로 이 장치의 충격 흡수 특성을 파악하기 위해, 돼지 대퇴골과 소 경골에대해 충격 망치를 이용하여 얻은 진동 실험 결과를 보여주며, 특히 와셔의 유무에 따른 충격 흡수 특성을 실험적으로 비교하였다.

Keywords

References

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