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Effectiveness and Biomechanical Analysis of the Ortho-Bridge System on Femoral Fracture Healing: A Retrospective Analysis
Indian Journal of Orthopaedics ( IF 1 ) Pub Date : 2022-08-09 , DOI: 10.1007/s43465-022-00687-4
Yubin Qi 1 , Lin Yao 2 , Yuntao Long 1 , Guilai Zuo 1 , Qingjie Zhang 3 , Zhenlin Liu 3 , Wen Wang 1
Affiliation  

Background

Among the surgical methods for femoral fractures, the Ortho-Bridge System (OBS) appears to heal fractures via an uncommon process. We compared its effectiveness and biomechanical aspects to those of a locking compression plate (LCP) and explained the healing process demonstrated by the OBS.

Methods

Eleven femoral shaft fracture cases treated with OBS between July 2017 and May 2020 were retrospectively reviewed. Clinical and radiographic data were collected during regular postoperative follow-up visits and assessed via the Harris Hip Score and Knee Society Score. We performed biomechanical experiments of OBS. We simulated different fracture conditions and selected appropriate screw holes at the fracture’s far and near segments. The OBS module was placed according to the position of LCP’s locking hole at both ends of the fracture; then, a static three-point bending test was performed.

Results

All patients had contralateral callus growth with secondary fracture healing. Healing time was 3–5 months with excellent hip and knee function. When the key screw distance was 22–34 mm, the OBS was significantly less stiff than the LCP (P < 0.05). The stiffness of LCP and OBS decreased significantly when the key screw distance was 49–82 mm, with the LCP being slightly stronger (P < 0.05).

Conclusions

Femoral shaft fracture treatment with OBS demonstrated secondary healing. When the distance between the key screws was 20–40 mm, the elasticity was higher in OBS than in LCP, possibly producing axial micro-motion to stimulate callus formation and promote fracture healing, which differ from the plate’s primary healing process.



中文翻译:

Ortho-Bridge 系统对股骨骨折愈合的有效性和生物力学分析:回顾性分析

背景

在股骨骨折的手术方法中,Ortho-Bridge System (OBS) 似乎通过一个不常见的过程来治愈骨折。我们将其有效性和生物力学方面与锁定加压钢板 (LCP) 进行了比较,并解释了 OBS 展示的愈合过程。

方法

回顾性分析了2017年7月至2020年5月间OBS治疗的11例股骨干骨折病例。在术后定期随访期间收集临床和影像学数据,并通过 Harris 髋关节评分和膝关节协会评分进行评估。我们进行了 OBS 的生物力学实验。我们模拟了不同的断裂条件,并在断裂的远段和近段选择了合适的螺钉孔。根据骨折两端LCP锁孔的位置放置OBS模块;然后,进行静态三点弯曲试验。

结果

所有患者均出现对侧骨痂生长,骨折继发愈合。愈合时间为 3-5 个月,髋关节和膝关节功能良好。当关键螺钉距离为 22-34 mm 时,OBS 的刚度明显低于 LCP(P  < 0.05)。LCP 和 OBS 的刚度在关键螺钉距离为 49-82 mm 时显着降低,LCP 稍强(P  < 0.05)。

结论

OBS 治疗股骨干骨折表现出二次愈合。当关键螺钉之间的距离为20-40 mm时,OBS的弹性高于LCP,可能产生轴向微动以刺激骨痂形成并促进骨折愈合,这与钢板的初级愈合过程不同。

更新日期:2022-08-09
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