The clinical and radiographic outcomes of type 2 medial meniscus posterior root tears following transtibial pullout repair

Takaaki Hiranaka, Takayuki Furumatsu, Yusuke Yokoyama, Keisuke Kintaka, Naohiro Higashihara, Masanori Tamura, Koki Kawada, Haowei Xue, Masanori Hamada, Toshifumi Ozaki

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)

Abstract

Purpose: The aim of this study was to compare the clinical outcomes of different subtypes of type 2 medial meniscus posterior root tears following transtibial pullout repair. Methods: In total, 147 patients (mean age: 66.2 ± 8.3 years) who were diagnosed with type 2 medial meniscus posterior root tears and underwent transtibial pullout repair were included. Patients were divided into 2A (n = 31), 2B (n = 90), and 2C (n = 26) groups according to tear type. Clinical outcomes were assessed pre-operatively and at second-look arthroscopy using the Knee injury and Osteoarthritis Outcome Score. The meniscal healing status was evaluated at second-look arthroscopy. Medial meniscus extrusion was calculated using magnetic resonance imaging pre-operatively and at second-look arthroscopy. Results: No significant differences in pre-operative or post-operative clinical scores were observed between each subtype, although clinical scores improved post-operatively for each subtype. Significant differences were noted in the anteroposterior width of the bridging tissues at second-look arthroscopy (2A, 7.1 ± 1.2; 2B, 6.2 ± 1.7; and 2C, 6.2 ± 1.7 mm; p = 0.045); type 2A tears were the widest. There was a significant difference in post-operative medial meniscus extrusion (2A, 3.2 ± 0.9; 2B, 4.0 ± 1.2; and 2C, 4.0 ± 1.4 mm; p = 0.004) and its progression (2A, 0.7 ± 0.6; 2B, 1.2 ± 0.8; and 2C, 1.2 ± 0.8 mm; p = 0.008), and type 2A tears were the shortest. Conclusion: Although there was no significant difference in the post-operative clinical scores among different type 2 tears in the short term, type 2A tears showed better healing and medial meniscus extrusion progression prevention, thus indicating the usefulness of classifying tear type in estimating post-operative outcomes. Level of Evidence: III.

Original languageEnglish
Pages (from-to)2323-2330
Number of pages8
JournalKnee Surgery, Sports Traumatology, Arthroscopy
Volume31
Issue number6
DOIs
Publication statusPublished - Jun 2023

Keywords

  • Magnetic resonance imaging
  • Medial meniscus extrusion
  • Medial meniscus posterior root tear
  • Pullout repair
  • Type 2 tear

ASJC Scopus subject areas

  • Surgery
  • Orthopedics and Sports Medicine

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