Comparison of Less Invasive Stabilization System Plate and Retrograde Intramedullary Nail in the Fixation of Femoral Supracondylar Fractures in the Elderly: A Biomechanical Study

被引：17

作者：

Du, Yu-ren ^{[1
]}

Ma, Jian-xiong ^{[2
]}

Wang, Shuo ^{[3
,4
]}

Sun, Lei ^{[2
]}

Wang, Ying ^{[2
]}

Lu, Bin ^{[2
]}

Bai, Hao-hao ^{[2
]}

Hu, Yong-cheng ^{[3
]}

Ma, Xin-long ^{[1
,2
]}

机构：

[1] Tianjin Med Univ, Gen Hosp, Dept Orthopaed, Tianjin, Peoples R China

[2] Tianjin Hosp, Tianjin Inst Orthopaed, Tianjin 300050, Peoples R China

[3] Tianjin Hosp, Dept Orthopaed, Tianjin 300211, Peoples R China

[4] 464 Hosp Peoples Liberat Army, Dept Orthopaed, Tianjin, Peoples R China

来源：

ORTHOPAEDIC SURGERY | 2019年 / 11卷 / 02期

关键词：

Biomechanical testing; Comminuted femoral supracondylar fracture; Less invasive stabilization system plate; Retrograde intramedullary nail; DISTAL FEMUR FRACTURES; INTERNAL-FIXATION; LCP; EPIDEMIOLOGY; LISS;

D O I：

10.1111/os.12449

中图分类号：

R826.8 [整形外科学]; R782.2 [口腔颌面部整形外科学]; R726.2 [小儿整形外科学]; R62 [整形外科学（修复外科学）];

学科分类号：

摘要：

Objective To compare the biomechanical stabilities of less invasive stabilization system (LISS) plate and retrograde intramedullary nail (IMN) for the comminuted femoral supracondylar fracture fractures in the elderly. Methods Sixteen pairs of embalmed cadaver femurs were obtained to simulate a comminuted supracondylar femur fracture (AO/OTA33-A3) gap model. All left-side specimens were fixed with LISS plate, and retrograde IMN were applied to the right-side specimens. All specimens were tested in torsional, axial and cyclic load mode on an Instron testing machine. Results The mean torsional stiffness for LISS plate group was 34.1% greater than retrograde IMN group (2.90 vs. 1.91 Nm/degree, P = 0.002), but the mean axial stiffness was greater for the retrograde IMN (199.16 vs. 303.93 N/mm, P < 0.001). The total deformation of LISS plate caused by cyclic axial loading was greater than retrograde IMN (4.17 vs. 3.57 mm, P = 0.014). Significantly less mean irreversible deformation was detected in LISS plate than in retrograde IMN (1.64 vs. 1.69 mm, P = 0.699). Failure loads of the constructs were significantly different between the two groups (LISS plate: 2941 +/- 128 N; retrograde IMN: 4022 +/- 176 N, P < 0.001). Conclusion For comminuted femoral supracondylar fractures in the elderly, the tested instruments can both maintain sufficient biomechanical stabilities, but retrograde IMN is superior to LISS plate in deformation of fracture site.

引用

页码：311 / 317

页数：7