Podolsky Dale, Mainprize James, McMillan Catherine, Binhammer Paul
Division of Plastic Surgery, Sunnybrook Health Sciences Centre, Toronto, Ontario, Canada.
J Hand Surg Am. 2011 Dec;36(12):1950-8. doi: 10.1016/j.jhsa.2011.09.013. Epub 2011 Nov 3.
To compare the cartilage thickness of the third toe joints to the finger proximal interphalangeal (PIP) joints to assess the appropriateness of using third toe osteochondral grafts for finger PIP joint reconstruction.
A laser scanner was used to construct 3-dimensional computer models of 6 matched cadaver right third toe PIP joints, condyles of the third toe middle phalanx, and finger PIP joints with and without cartilage. Cartilage distribution patterns were computed and analyzed for each surface. The cartilage thickness of both sides of the third toe PIP joint and the third toe middle phalanx condyles were compared to the PIP joint of the fingers. A total of 18 third toe and 48 finger joint surfaces were analyzed.
For the third toe middle phalanx condyles, the mean thickness was 0.20 ± 0.09 mm with a maximum of 0.52 ± 0.18 mm, and a coefficient of variation (CV%; a measure of uniformity of cartilage distribution) of 62. For the third toe proximal phalanx condyles, the mean cartilage thickness was 0.26 ± 0.10 mm with a maximum thickness of 0.56 ± 0.14 mm and a CV% of 44. The mean thickness, maximum thickness, and CV% of the finger proximal phalanx condyles was 0.43 ± 0.11 mm, 0.79 ± 0.16 mm, and 31, respectively. For the third toe middle phalanx base, the mean thickness was 0.28 ± 0.06 mm with a maximum of 0.47 ± 0.09 mm and a CV% of 34, compared to the finger middle phalanx base mean of 0.40 ± 0.12 mm with a maximum of 0.67 ± 0.14 mm and a CV% of 27.
There were significant differences in cartilage thickness between the third toe and the fingers in this study. However, fewer differences were observed with the third toe middle phalanx base cartilage thickness than with the third toe condyles in comparison to the fingers.
比较第三趾关节与手指近端指间（PIP）关节的软骨厚度，以评估使用第三趾骨软骨移植修复手指PIP关节的适宜性。
使用激光扫描仪构建6对匹配的尸体右第三趾PIP关节、第三趾中节指骨髁以及有和没有软骨的手指PIP关节的三维计算机模型。计算并分析每个表面的软骨分布模式。将第三趾PIP关节两侧以及第三趾中节指骨髁的软骨厚度与手指的PIP关节进行比较。总共分析了18个第三趾和48个手指关节表面。
对于第三趾中节指骨髁，平均厚度为0.20±0.09毫米，最大厚度为0.52±0.18毫米，变异系数（CV%；软骨分布均匀性的一种度量）为62。对于第三趾近节指骨髁，平均软骨厚度为0.26±0.10毫米，最大厚度为0.56±0.14毫米，CV%为44。手指近节指骨髁的平均厚度、最大厚度和CV%分别为0.43±0.11毫米、0.79±0.16毫米和31。对于第三趾中节指骨基部，平均厚度为0.28±0.06毫米，最大厚度为0.47±0.09毫米，CV%为34，而手指中节指骨基部的平均值为0.40±0.12毫米，最大厚度为0.67±0.14毫米，CV%为27。
本研究中第三趾与手指的软骨厚度存在显著差异。然而，与手指相比，第三趾中节指骨基部软骨厚度的差异比第三趾髁的差异少。
