Wu Xuhua, Wang Gang, Xia Qingquan, Rong Ke, Gan Minfeng, Wen Gen, Yin Xiaofan, Yang Huilin
1Department of Orthopedics, The First Affiliated Hospital of Soochow University, No.899, Pinghai Road, Soochow, 215006 China.
2Department of Orthopedics, Minhang Hospital, Fudan University, No.170, Xinsong Road, Shanghai, 201199 China.
Indian J Orthop. 2020 Jan 24;54(2):141-147. doi: 10.1007/s43465-019-00034-0. eCollection 2020 Apr.
AO clavicular hook plates have been widely used for treating acromioclavicular (AC) joint dislocation and distal clavicle fractures. Many complications have been reported, and many patients have complained about the discomfort of the plate. However, no study on the impact of clavicular hook plates in AC joint 3D printing models has been reported.
To evaluate the matching performance of hook plates with different hook depths when they were implanted in 3D printing models of normal Chinese AC joints and to propose a further design to achieve a better match.
AO clavicular hook plates with two different hook depths of 15 mm and 18 mm were implanted in 3D printing models of forty Chinese normal AC joints. The angle between the distal clavicle and plate (CPA) and the drop between acromion and distal clavicle (ACD) of normal AC joints with and without plates were measured.
Mismatch was found when the hook plates were implanted, with an average CPA of 18.8 ± 5.1° with the 15-mm hook plate and 10.2 ± 4.9° with the 18-mm hook plate. To eliminate the CPA, the ACD decreased by 6.3 ± 1.1 mm with the 15-mm hook plate and 2.9 ± 0.9 mm with the 18-mm hook plate.
The results revealed that AO clavicular hook plates with different hook depths were very likely to result in over-reduction of the AC joint. It is necessary to bend the hook angle to fit the patient's AC joint to achieve accurate reduction.
AO锁骨钩钢板已广泛应用于治疗肩锁关节脱位和锁骨远端骨折。已有许多并发症的报道，许多患者抱怨钢板带来的不适。然而，尚未有关于锁骨钩钢板在肩锁关节三维打印模型中影响的研究报道。
评估不同钩深的钩钢板植入正常中国人群肩锁关节三维打印模型时的匹配性能，并提出进一步设计以实现更好的匹配。
将两种不同钩深（15 mm和18 mm）的AO锁骨钩钢板植入40个中国正常肩锁关节的三维打印模型中。测量有钢板和无钢板时正常肩锁关节中锁骨远端与钢板之间的夹角（CPA）以及肩峰与锁骨远端之间的落差（ACD）。
植入钩钢板时发现不匹配，15 mm钩钢板的平均CPA为18.8±5.1°，18 mm钩钢板的平均CPA为10.2±4.9°。为消除CPA，15 mm钩钢板使ACD降低6.3±1.1 mm，18 mm钩钢板使ACD降低2.9±0.9 mm。
结果表明，不同钩深的AO锁骨钩钢板很可能导致肩锁关节过度复位。有必要弯曲钩角以适应患者的肩锁关节，从而实现准确复位。
