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No difference in clinical outcomes after total knee arthroplasty between patellar eversion and non-eversion

  • Knee
  • Published:
Knee Surgery, Sports Traumatology, Arthroscopy Aims and scope

Abstract

Purpose

Multiple surgical techniques in minimally invasive total knee arthroplasty (TKA) are associated with clinical differences. However, whether patellar eversion impairs clinical outcomes remains controversial. We conducted a systematic review of randomized controlled trials (RCTs) to provide current understanding on this topic.

Methods

A literature search of the PubMed, Embase, and Cochrane library databases was performed to identify RCTs comparing patellar eversion with patellar non-eversion (PN). Two authors independently selected the studies, assessed methodological quality, and extracted data.

Results

Five RCTs involving 379 knees were included. The results revealed no significant differences in functional scores, pain, quality of life, quadriceps strength, patellar height, alignment, or complication rate between patellar eversion and PN. Power analysis showed that the power of the individual study and meta-analysis ranged from 5.0 to 70.8 %, with the exception of the power of alignment and patellar height in two of the individual studies, which was 100.0 and 99.9 %, respectively.

Conclusions

Based on the current evidence, patellar eversion during TKA could not definitely lead to inferior postoperative outcomes. Patellar eversion and patellar non-eversion could achieve similar clinical outcomes.

Level of evidence

Systematic review and meta-analysis, Level I.

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Conflict of interest

The authors declare that they have no conflict of interest.

Author information

Authors and Affiliations

  1. Department of Orthopaedics, Navy General Hospital, No. 6, Fucheng Road, Beijing, 100048, China

    Zhiwei Jia, Chun Chen, Yaohong Wu, Wei Li, Deli Wang, Qing He & Dike Ruan

  2. The Third Clinical Medical College, Southern Medical University, Guangzhou, China

    Chun Chen & Yaohong Wu

  3. Department of Orthopaedics, Wuhan Pu’Ai Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China

    Fan Ding

  4. Graduate College, Tianjin University of Traditional Chinese Medicine, Tianjin, China

    Xu Tian

Authors
  1. Zhiwei Jia
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  2. Chun Chen
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  3. Yaohong Wu
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  4. Fan Ding
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  5. Xu Tian
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  6. Wei Li
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Corresponding author

Correspondence to Dike Ruan.

Additional information

Zhiwei Jia, Chun Chen have contributed equally to this work.

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Jia, Z., Chen, C., Wu, Y. et al. No difference in clinical outcomes after total knee arthroplasty between patellar eversion and non-eversion. Knee Surg Sports Traumatol Arthrosc 24, 141–147 (2016). https://doi.org/10.1007/s00167-014-3351-4

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  • DOI: https://doi.org/10.1007/s00167-014-3351-4

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