Department of Orthopaedics and Traumatology, Akdeniz University, Antalya, Turkey.
Int J Med Robot. 2014 Mar;10(1):93-7. doi: 10.1002/rcs.1528. Epub 2013 Aug 26.
Proximal tibial open wedge osteotomy (PTO) is a corrective operation used in the surgery of lower extremities and is applied to patients with varus deformities for sufficient correction. The aim of the study was to evaluate whether the PTO can achieve decreased stress-bearing on the tibia and tarsal bones in addition to correcting the mechanical axis of the lower limb in patients with tibia vara.
Three-dimensional (3D) solid modelling of the lower extremity was carried out using computed tomography (CT) and magnetic resonance (MR)-containing images of all of the bony elements and non-bony structures. PTO was applied to the obtained deformed model in the computer environment and the correction was carried out.
Stress distributions in menisci, tibia and tarsal bones were calculated. With respect to loading on the tarsal bones, the maximum equivalent stresses on all bones decreased except for the navicula in the PTO-simulated model in the current study.
These results clearly indicate that PTO can achieve decreased stresses on the tarsal bones in patients with tibia vara.
胫骨近端楔形截骨术（PTO）是一种用于下肢手术的矫正操作，适用于有内翻畸形的患者以进行充分矫正。本研究旨在评估 PTO 是否除了矫正下肢力学轴外，还可以降低胫骨和跗骨的负重。
使用包含 CT 和 MR 的所有骨骼元素和非骨骼结构的图像对下肢进行三维（3D）实体建模。在计算机环境中对获得的变形模型进行 PTO，并进行矫正。
计算了半月板、胫骨和跗骨的应力分布。就跗骨受力而言，除了舟骨外，当前研究中 PTO 模拟模型中所有骨骼的最大等效应力均降低。
这些结果清楚地表明，PTO 可以降低胫骨畸形患者的跗骨受力。
