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Saucerization of complete discoid lateral meniscus is associated with change of morphology of the lateral femoral condyle and tibial plateau

  • Orthopaedic Surgery
  • Published:
Archives of Orthopaedic and Trauma Surgery Aims and scope Submit manuscript

Abstract

Purpose

To determine the effect of saucerization surgery on knee joint morphology associated with a complete discoid lateral meniscus (DLM) using magnetic resonance (MR) imaging.

Methods

This retrospective study included cases had undergone saucerization surgery for symptomatic DLM between 2007 and 2022. All cases were divided into two by age group: < 12 (U13) and > 13 (O13). The cases in the match group were randomly selected from preoperative cases in the O13 group matched with the age at the final follow-up (F/U) of cases in the U13 group. The following morphological parameters were evaluated using MR images preoperatively and at the final postoperative F/U in each group: anterior obliquity of the lateral tibial plateau (AOLTP), posterior obliquity of the lateral tibial plateau (POLTP), and the lowest point of the lateral femoral condyle (LPLFC). Each parameter was compared between the U13 preoperative (pre-OP) group and the O13 pre-OP group, the preoperative and final follow-up in the U13, and the U13 group at the final F/U and the match group preoperatively.

Results

A total of 77 cases were evaluated. 31 cases were in the U13 pre-OP group and 46 were in the O13 pre-OP group. With a minimal F/U of 2 years, 27 cases in the U13 group and 36 in the O13 group were included. The mean F/U period was 4.6 years in the U13 group and 3.2 years in the O13 group. 32 cases were included in the match group. In the match group, the inclination of the POLTP was significantly larger (P = 0.042) and the LPLFC was more lateral (P = 0.0034) than at the final F/U in the U13 group.

Conclusions

Saucerization surgery for DLM in juvenile patients can prevent progression to the characteristic bone morphology DLM. These results could help the surgeon making the decision when the surgery would be performed for symptomatic DLM patients.

Level of evidence

Retrospective comparative study; level of evidence, 3.

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Data availability

The data associated with this study is available from the corresponding author on reasonable request.

Abbreviations

DLM:

Discoid lateral meniscus

MR:

Magnetic resonance

AOLTP:

Anterior obliquity of the lateral tibial plateau

POLTP:

Posterior obliquity of the lateral tibial plateau

LPLFC:

Lowest point of the lateral femoral condyle

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Acknowledgements

We would like to thank Editage (https://www.editage.com) for English language editing.

Funding

The authors did not receive support from any organization for the submitted work. No funding was received to assist with the preparation of this manuscript. No funding was received for conducting this study. No funds, grants, or other support was received. The authors have no relevant financial or non-financial interests to disclose. All authors certify that they have no affiliations with or involvement in any organization or entity with any financial interest or non-financial interest in the subject matter or materials discussed in this manuscript. The authors have no financial or proprietary interests in any material discussed in this article.

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Authors and Affiliations

  1. Department of Orthopaedic Surgery, Osaka City University Graduate School of Medicine, Osaka, Japan

    Takuya Kinoshita, Kazuya Nishino & Ken Iida

  2. Department of Orthopaedic Surgery, Osaka Metropolitan University Graduate School of Medicine, 1-4-3 Asahi-machi, Abeno-ku, Osaka, 545-8585, Japan

    Yusuke Hashimoto & Hiroaki Nakamura

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  1. Takuya Kinoshita
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Correspondence to Yusuke Hashimoto.

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This study approved by the hospital ethics committee and the internal review board of our institution (3071, 3072).

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Kinoshita, T., Hashimoto, Y., Nishino, K. et al. Saucerization of complete discoid lateral meniscus is associated with change of morphology of the lateral femoral condyle and tibial plateau. Arch Orthop Trauma Surg 143, 7019–7026 (2023). https://doi.org/10.1007/s00402-023-04999-4

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