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Comparison of Tension-Band Wiring With the Cable Pin System in Patella Fractures

A Randomized Prospective Study

Tian, Qing-xian MD; Hai, Yong MD; Du, Xin-ru MD; Xu, Zi-yu MS; Lu, Tie MS; Shan, Lei MD; Liu, Yang MS; Zhou, Jun-lin MD, PhD

doi: 10.1097/BOT.0000000000000400
Original Article
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Objectives: To compare the outcome of tension-band wiring (TBW) with the cable pin system (CPS) for transverse fractures of the patella.

Design: Randomized prospective study.

Setting: Academic Level I trauma center.

Patients/Participants: From February 2008 to December 2011, 73 consecutive patients with transverse fractures of the patella were prospectively enrolled in this study.

Intervention: The patients were randomly divided into 2 groups: one group was treated using the CPS, and the other group was treated using the modified TBW.

Main Outcome Measurements: The clinical outcome assessment included analyses of the radiographic images, the modified Hospital for Special Surgery scoring system, and complications.

Results: The follow-up time ranged from 12 to 29 months. All fractures healed, with a union rate of 100%. The fracture healing time was significantly shorter in the CPS group (8.51 ± 2.59 weeks, n = 34) compared with the TBW group (11.79 ± 3.04 weeks, n = 39). Postoperative complications in the CPS and TBW groups were observed in 1 and 9 patients, respectively, a difference that was statistically significant. The mean Hospital for Special Surgery score for the CPS group (90.53 ± 5.19 points) was significantly higher than that for the TBW group (81.36 ± 12.71 points).

Conclusions: The CPS is a viable option for transverse fractures of the patella and is associated with a shorter healing time, fewer complications, and better function than TBW.

Level of Evidence: Therapeutic Level I. See Instructions for Authors for a complete description of levels of evidence.

Department of Orthopaedics, Beijing Chao-Yang Hospital Affiliated to Capital Medical University, Beijing, China.

Reprints: Jun-lin Zhou, MD, PhD, Department of Orthopaedics, Beijing Chao-Yang Hospital Affiliated to Capital Medical University, 8 Gongtinan Rd, Beijing 100020, China (e-mail: junlinjlzh@sohu.com).

Supported by the National Natural Science Foundation of China (No.: 81071515).

The authors report no conflict of interest.

Accepted July 16, 2015

Copyright © 2015 Wolters Kluwer Health, Inc. All rights reserved.