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Younger patients, lower BMI, complete meniscus root healing, lower HKA degree and shorter preoperative symptom duration were the independent risk factors correlated with the good correction of MME in patients with repaired MMPRTs

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Knee Surgery, Sports Traumatology, Arthroscopy Aims and scope

Abstract

Purpose

To evaluate the clinical and radiological outcomes of arthroscopically assisted tendon graft anatomic reinforced reconstruction of the medial meniscus posterior root tears (MMPRTs) and identify relevant factors affecting the correction of medial meniscal extrusion (MME).

Methods

Fifty-three MMPRTs patients who underwent arthroscopically assisted tendon graft reconstruction of the meniscal root between 2018 and 2020 were evaluated retrospectively. the patients were divided into 2 groups according to the correction of MME (maintained MME group: 32 cases vs. increased MME group: 21 cases). The clinical and radiological outcomes of arthroscopically assisted tendon graft reconstruction of the meniscal root, including postoperative correction of MME and functional recovery of the knee were assessed in this study, and potential independent risk factors that could influence the correction of MME were also evaluated.

Results

The functional recovery of the knee was significantly improved at the end of follow-up (P < 0.001; respectively), furthermore, a comparison of the final functional outcomes between the groups showed that the mean Lysholm score and IKDC score of the maintained MME group were significantly improved than those of increased MME group. 60.4% had good correction of MME, and patients with complete healing had better extrusion correction than those with partial healing and non-healing. Binary logistic regression models analysis indicated that the age (OR = 1.053, P = 0.048), BMI (OR = 1.376, P = 0.004), meniscus root healing status (OR = 7.701, P = 0.005), HKA degree (OR = 1.891, P = 0.011) and preoperative symptom duration (OR = 1.055, P = 0.013) were the independent risk factors correlated with correction of MME. Additionally, the ROC curve demonstrated the cut-off values of the Age, BMI, HKA degree and preoperative symptom duration were 46.0 years, 22.5 kg/m2, 3.2° and 9.5 months, respectively,

Conclusions

The arthroscopically assisted tendon graft anatomic reinforced reconstruction of the meniscal root showed clinical improvement and prevented the progression of postoperative MME. Additionally, younger patients, lower BMI, complete meniscus root healing, lower HKA degree and shorter preoperative symptom duration were the independent risk factors correlated with the good correction of MME in patients with repaired MMPRTs.

Level of Evidence

Level IV.

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Data availability

All the data will be available upon reasonable request to the corresponding author of the present paper.

Abbreviations

MMPRTs:

Medial meniscus posterior root tears

MME:

Medial meniscal extrusion

MRI:

Magnetic resonance imaging

K-L:

Kellgren-Lawrence

VAS:

Visual analogue scale

IKDC:

International knee documentation committee

HKA:

Hip–knee–ankle

ROC:

Receiver operating characteristic

BMI:

Body mass index

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Acknowledgements

The first and second authors (Nie si and Hongbo Li) contributed equally to this study and share first authorship

Funding

No funding was obtained for this study.

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Author notes

  1. Si Nie and Hongbo Li contributed eqully to this work.

Authors and Affiliations

  1. Department of Radiology, Jiangxi Provincial People’s Hospital, (The First Affiliated Hospital of Nanchang Medical College), Nanchang, 330006, People’s Republic of China

    Si Nie

  2. Department of Orthopedics, Jiangxi Provincial People’s Hospital, (The First Affiliated Hospital of Nanchang Medical College), No.92 Aiguo Road, Donghu District, Nanchang, Jiangxi Province, 330006, People’s Republic of China

    Hongbo Li, Xingen Liao & Min Lan

  3. Department of Nursing Science, Jiangxi Provincial People’s Hospital, (The First Affiliated Hospital of Nanchang Medical College), Nanchang, 330006, People’s Republic of China

    Qing Liu

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Contributions

The authors made the following contributions: Lan min made the conception for this research. Data collection and analysis were performed by Hongbo Li and Xingen Liao. Si Nie and Hongbo Li analyzed the data and drafted the article. Lan min. Qing Liu and Si Nie reviewed/ edited the manuscript. All the authors critically revised the article for important intellectual content. The authors read and approved the final manuscript.

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Correspondence to Min Lan.

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This work was supported by the Science and Technology Plan of Jiangxi Provincial Health Commission (grant numbers 202210183) and Jiangxi Administration of Traditional Chinese Medicine (grant numbers 2022B467).

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Nie, S., Li, H., Liao, X. et al. Younger patients, lower BMI, complete meniscus root healing, lower HKA degree and shorter preoperative symptom duration were the independent risk factors correlated with the good correction of MME in patients with repaired MMPRTs. Knee Surg Sports Traumatol Arthrosc 31, 3775–3783 (2023). https://doi.org/10.1007/s00167-023-07330-1

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