Landsman A S, Vogler H W
University of Pennsylvania, Philadelphia.
J Foot Surg. 1992 May-Jun;31(3):211-8.
The modified Juvara osteotomy is a classic oblique base wedge osteotomy of the first metatarsal and is often used to reduce hallux valgus deformity. However, complications attributed to osteotomy instability and currently available modes of osteosynthesis are common. The authors have developed a technique that enables them to quantitatively and objectively evaluate the stability of this osteotomy when various modes of internal fixation are used. Stability testing was performed on fresh, previously frozen human cadaveric specimens using engineering principles. Results indicate that there is no statistically significant difference in stability between crossed 0.062-inch Kirschner wire fixation and internal fixation using a single 3.5-mm. cancellous screw. The tests also indicate that both of these techniques are superior to two 2.7-mm. cortical screws for stability.
改良朱瓦拉截骨术是第一跖骨经典的斜基底部楔形截骨术，常用于矫正拇外翻畸形。然而，截骨不稳定及现有内固定方式导致的并发症很常见。作者开发了一种技术，可在使用各种内固定方式时对该截骨术的稳定性进行定量和客观评估。利用工程原理对新鲜的、先前冷冻的人体尸体标本进行稳定性测试。结果表明，交叉使用0.062英寸克氏针固定与使用单枚3.5毫米松质骨螺钉内固定在稳定性上无统计学显著差异。测试还表明，这两种技术在稳定性方面均优于使用两枚2.7毫米皮质骨螺钉。
