CAJ | 학술논문

目的：研究新式微创经骶骨前入路腰骶椎内固定系统在材料力学方面的生物力学特点。方法对新式微创腰骶椎中轴固定螺钉进行有限元建模，并以材料（不锈钢）和负荷状态（生理负荷或极限负荷）为边界条件，通过有限元分析，研究其在不同边界条件组合下的载荷强度和分布状况。结果在人体腰骶椎生理和极限两种负荷状态下，中轴固定螺钉所承受的最大压强值为489MPa，此数据小于冷轧加工和冷锻条件下不锈钢的屈服强度（792MPa和1213MPa），说明以这两种加工条件所制造的不锈钢为制造材料，新式微创内固定系统均可达到强度要求，而且机械性能特点基本相同。结论新式微创经骶骨前入路腰骶椎内固定系统在材料力学方面达到了设计要求，适合临床应用。
목적：연구신식미창경저골전입로요저추내고정계통재재료역학방면적생물역학특점。방법대신식미창요저추중축고정라정진행유한원건모，병이재료（불수강）화부하상태（생리부하혹겁한부하）위변계조건，통과유한원분석，연구기재불동변계조건조합하적재하강도화분포상황。결과재인체요저추생리화겁한량충부하상태하，중축고정라정소승수적최대압강치위489MPa，차수거소우랭알가공화랭단조건하불수강적굴복강도（792MPa화1213MPa），설명이저량충가공조건소제조적불수강위제조재료，신식미창내고정계통균가체도강도요구，이차궤계성능특점기본상동。결론신식미창경저골전입로요저추내고정계통재재료역학방면체도료설계요구，괄합림상응용。
Objective To research the biomechanical characteristics of the new designed device that were in the mechanics of materials. Methods Set up the finite element model of the device, and for the boundary conditions of materials (stainless steel) and load conditions (physiological or extreme loads), study its combined intensity and distribution of load under different combinations of the boundary conditions, by finite element analysis. Results Under the physiological and extreme load states of the lumbosacral vertebrae, the maximum pressure bear by the device was 489MPa, the data was less than the yield strength of cold rolling and cold forging conditions of stainless steel (792MPa and 1213MPa), so made with this two kinds of processing conditions for manufactur-ing stainless steel material, the device both met the requirement of strength, and the characteristics in mechanical function were basically identical. Conclusion The new fixation device has met the designing requirements in the mechanics of materials, and was fit to be applied in the clinical treatment.