Orthopedic Research Center, Ghaem Hospital, Mashhad University of Medical Sciences, Mashhad, Iran.
Orthopedic Research Center, Ghaem Hospital, Mashhad University of Medical Sciences, Mashhad, Iran.
Orthop Traumatol Surg Res. 2021 Sep;107(5):102975. doi: 10.1016/j.otsr.2021.102975. Epub 2021 Jun 1.
To avoid the DRUJ surgical procedures disadvantages, a new intraosseous distal radioulnar prosthesis designed on Sauvé-Kapandji procedure has been introduced. Stability of the prosthesis and biomechanics are to be evaluated in this article.
On a cadaveric study, during placement of the prosthesis, biometry of the bones, prosthesis stability (in axial and lateral tractions, wrist pronation and supination, and squeeze test), wrist range of motion before and after implantation, and radiographic evaluation were done on 16 cadavers.
Range of motion of the wrist joint before and after the insertion of the prosthesis, had no significant difference in all six directions. Stability of the prosthesis, when rotational pronation force was exerted, was greater than when rotational supination force was exerted. The prosthesis showed significant stability against longitudinal traction forces in a way that no prosthesis dislocation was observed up to 150N forces. Stability of the prosthesis was investigated when lateral force was applied to different wrist positions. The most stable position of the prosthesis was in the case of lateral traction forces in supination where no case of dislocation was observed.
The intraosseous distal radioulnar prosthesis demonstrated stable structure with no effect on wrist range of motion.
IV.
为避免 DRUJ 手术的缺点，引入了一种新的基于 Sauvé-Kapandji 手术的骨内下尺桡关节假体。本文旨在评估该假体的稳定性和生物力学性能。
在一项尸体研究中，在放置假体时，对骨骼进行了生物测量，评估了假体的稳定性（轴向和侧向牵引、腕关节旋前和旋后、挤压试验）、植入前后腕关节活动范围以及影像学评估。
在所有六个方向上，植入假体前后腕关节的活动范围均无显著差异。当施加旋转旋前力时，假体的稳定性大于当施加旋转旋后力时。假体在纵向牵引力下表现出显著的稳定性，在 150N 力的情况下未观察到假体脱位。还研究了在不同腕部位置施加侧向力时假体的稳定性。在旋后位施加侧向牵引力时，假体的稳定性最高，未观察到脱位。
骨内下尺桡关节假体具有稳定的结构，对腕关节活动范围无影响。
IV。
