Biomechanical effects of plate area and locking screw on medial open tibial osteotomy

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题名:	Biomechanical effects of plate area and locking screw on medial open tibial osteotomy
作者:	曾清秀;Luo, Chu-An;Lin, Shang-Chih;Hwa, Su-Yang;Chen, Chun-Ming;Tseng, Ching-Shiow
贡献者:	工學院機械工程學系
关键词:	Biomechanical Phenomena;Bone Plates;Bone Screws;finite-element analysis;high tibial osteotomy;Humans;knee;locking screw;Osteoarthritis, Knee - surgery;Osteotomy - methods;plate;Tibia - physiology;Tibia - surgery;Tomography, X-Ray Computed
日期:	2015-09-10
上传时间:	2026-04-23 14:47:13 (UTC+8)
出版者:	Informa Healthcare;England: Taylor & Francis
摘要:	摘要： Medial open high tibial osteotomy (HTO) has been used to treat osteoarthritis of the medial compartment of the knee. However, weaker plate strength, unstable plate/screw junction and improper surgery technique are highly related to the HTO outcomes. Two π-shape plates were designed and eight variations (two supporting area × four locking stiffness) were compared by finite-element method. The computed tomography-based tibia was reconstructed and both wedge micromotion and implant stresses were chosen as the comparison indices. The construct was subjected to surgical and physiological loads. The medial-posterior region is the most loaded region and the load through the posterior leg is about four times that through the anterior leg. This indicates that the two-leg design can form a force-couple mechanism to effectively reduce the implant stresses. The use of locking screws significantly decrease the screw and hole stresses. However, the extending plate reduces the stresses of screws and holes above the wedge but makes the distal screws and holes much stressed. Wedge micromotion is affected by extending plate rather than locking screw. Three factors contribute to effective stabilisation of unstable HTO wedge: (1) intimate tibia-plate contact at medial-posterior regions, (2) sufficient rigidity at plate-screw junctions and (3) effective moment-balancing design at distal tibia-plate interfaces. 其他題名： Comput Methods Biomech Biomed Engin 出版者： England: Taylor & Francis 出版日期： 2015-09-10 出處： Computer methods in biomechanics and biomedical engineering, 2015-09, Vol.18 (12), p.1263-1271 版權： 2014 Taylor & Francis 2014 識別號： ISSN: 1025-5842 識別號： ISSN: 1476-8259 識別號： EISSN: 1476-8259 識別號： DOI: 10.1080/10255842.2014.895335 識別號： PMID: 24617553
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