Clinical outcomes of medial meniscus posterior root repair: A midterm follow-up study

Takayuki Furumatsu, Shinichi Miyazawa, Yuya Kodama, Yusuke Kamatsuki, Yoshiki Okazaki, Takaaki Hiranaka, Yuki Okazaki, Keisuke Kintaka, Toshihumi Ozaki

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)


Background: Transtibial pullout repair of medial meniscus posterior root tears (MMPRTs) cannot prevent the progression of knee osteoarthritis. Conversions of knee arthroplasties are occasionally required following MMPRT repair. However, other knee-related surgical treatments following MMPRT repair are unclear. This study was aimed at investigating the midterm clinical outcomes and knee-related surgical events following MMPRT repair. Methods: Patients with MMPRT underwent pullout repair using FasT-Fix modified Mason-Allen (F-MMA) suturing with an all-inside meniscal repair device. Thirty-two patients with follow-up duration >2 years were enrolled. We assessed the clinical outcomes and postoperative surgical treatment of both knees. Results: F-MMA pullout repair improved all clinical evaluation scores in patients with MMPRT at a mean follow-up of 36.1 months. Postoperative arthroscopic debridement was required for one patient. An additional MMPRT repair was performed in one patient on second-look arthroscopy. None of the patients required ipsilateral knee arthroplasty. In the contralateral knees, one pullout repair of a newly developed MMPRT and two knee arthroplasties were performed. Conclusions: This study demonstrated that F-MMA pullout repair yielded satisfactory clinical outcomes. However, subsequent knee-related surgeries were observed in 6.3% of the pullout-repaired knees and 9.4% of the contralateral knees. Our results suggest that surgeons should be aware of the worsening and/or occurrence of contralateral knee joint disease, even when the postoperative clinical outcomes are satisfactory following MMPRT repair. Level of evidence: IV.

Original languageEnglish
Pages (from-to)141-147
Number of pages7
Publication statusPublished - Oct 2022


  • Clinical outcome
  • Medial meniscus
  • Posterior root tear
  • Transtibial pullout repair

ASJC Scopus subject areas

  • Orthopedics and Sports Medicine


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