Quílez M P, Pérez M A, Seral-García B
Investigación, Universidad de Zaragoza, Zaragoza, España.
Departamento de Ingeniería Mecánica, Instituto de Investigación Sanitaria de Aragón (IIS), Universidad de Zaragoza, Zaragoza, España.
Rev Esp Cir Ortop Traumatol. 2015 Sep-Oct;59(5):365-71. doi: 10.1016/j.recot.2014.12.003. Epub 2015 Jan 29.
The best management of severe bone defects following total knee replacement is still controversial. Metal augments, tantalum cones and porous tibial sleeves could help the surgeon to manage any type of bone loss, providing a stable and durable knee joint reconstruction. Five different types of prostheses have been analysed: one prosthesis with straight stem; two prostheses with offset stem, with and without supplement, and two prostheses with sleeves, with and without stem. The purpose of this study is to report a finite element study of revision knee tibial implants. The main objective was to analyse the tibial bone density changes and Von Misses tension changes following different tibial implant designs. In all cases, the bone density decreases in the proximal epiphysis and medullary channels, with a bone density increase also being predicted in the diaphysis and at the bone around the stems tips. The highest value of Von Misses stress has been obtained for the straight tibial stem, and the lowest for the stemless metaphyseal sleeves prosthesis.
全膝关节置换术后严重骨缺损的最佳处理方法仍存在争议。金属增强物、钽锥体和多孔胫骨套管有助于外科医生处理任何类型的骨丢失，实现稳定且持久的膝关节重建。已分析了五种不同类型的假体：一种直柄假体；两种带偏置柄的假体，分别有无补充物；两种带套管的假体，分别有无柄。本研究的目的是报告翻修膝关节胫骨植入物的有限元研究。主要目的是分析不同胫骨植入物设计后胫骨骨密度变化和冯·米塞斯应力变化。在所有情况下，近端骨骺和髓腔内骨密度降低，同时预计骨干和柄尖周围骨的骨密度会增加。直胫骨柄的冯·米塞斯应力值最高，无柄干骺端套管假体的应力值最低。
