Department of Orthopedics, Chenggong Hospital of Xiamen University(the 73th Group Military Hospital of People's Liberation Army), Xiamen, China.
J Orthop Surg (Hong Kong). 2024 May-Aug;32(2):10225536241257169. doi: 10.1177/10225536241257169.
The purpose of this study was to investigate the effect of 3D-printed technology to repair glenoid bone defect on shoulder joint stability. The shoulder joints of 25 male cadavers were tested. The 3D-printed glenoid pad was designed and fabricated. The specimens were divided into 5 groups. Group A: no bone defect and the structure of the glenoid labrum and joint capsule was intact; Group B: Anterior inferior bone defect of the shoulder glenoid; Group C: a pad with a width of 2 mm was installed; Group D: a pad with a width of 4 mm was installed; Group E: a pad with a width of 6 mm was installed. This study measured the distance the humeral head moved forward at the time of glenohumeral dislocation and the maximum load required to dislocate the shoulder. The shoulder joint stability and humerus displacement was significantly lower in groups B and C compared with group A ( < .05). Compared with group A, the stability of the shoulder joint of group D was significantly improved ( < .05). However, there was no significant difference in humerus displacement between groups D and A ( > .05). In addition, compared with group A, shoulder joint stability was significantly increased and humerus displacement was significantly decreased in group E ( < .05). The 3D-printed technology can be used to make the shoulder glenoid pad to perfectly restore the geometric shape of the shoulder glenoid articular surface. Moreover, the 3D-printed pad is 2 mm larger than the normal glenoid width to restore the initial stability of the shoulder joint.
本研究旨在探讨 3D 打印技术修复肩盂骨缺损对肩关节稳定性的影响。测试了 25 具男性尸体的肩关节。设计并制造了 3D 打印的盂肱关节盂垫。将标本分为 5 组。A 组：无骨缺损，盂唇和关节囊结构完整；B 组：肩盂前下骨缺损；C 组：安装宽 2mm 的垫；D 组：安装宽 4mm 的垫；E 组：安装宽 6mm 的垫。本研究测量了肩关节脱位时肱骨头向前移动的距离和脱位所需的最大负荷。与 A 组相比，B 组和 C 组的肩关节稳定性和肱骨头位移明显降低（<0.05）。与 A 组相比，D 组的肩关节稳定性明显提高（<0.05）。然而，D 组和 A 组之间的肱骨头位移没有显著差异（>0.05）。此外，与 A 组相比，E 组的肩关节稳定性显著增加，肱骨头位移显著降低（<0.05）。3D 打印技术可用于制造肩盂垫，以完美恢复肩盂关节面的几何形状。此外，3D 打印垫比正常肩盂宽度宽 2mm，可恢复肩关节的初始稳定性。
