Archives of Orthopaedic and Trauma Surgery

, Volume 138, Issue 6, pp 843–850 | Cite as

Graft extrusion after medial and lateral MAT differs according to surgical technique: a meta-analysis

  • Seong-Il Bin
  • Hyun-Jung Kim
  • Dae-Hee Lee
Arthroscopy and Sports Medicine



It is unclear whether the incidence and amount of graft extrusion differ between knees undergoing medial and lateral meniscus allograft transplantation (MAT). This meta-analysis, therefore, compared the incidence and amount of transplanted meniscus allograft extrusion following medial and lateral MAT.

Materials and methods

All studies comparing absolute or relative extrusions, or proportion of major extrusions (> 3 mm), on magnetic resonance imaging between medial and lateral MATs were included.


Eight studies were included in the meta-analysis. Using the arthroscopic-assisted technique, medial MAT had significantly greater absolute (0.99 mm, p = 0.002) and relative (19.4%, p = 0.001) extrusions than lateral MAT. Using the complete arthroscopic technique, lateral MAT had 1.45 mm greater absolute extrusion than medial MAT (p < 0.001), but there was no difference in relative extrusion. Using the arthroscopic-assisted technique, the proportion of knees with major extrusion was greater for medial than lateral MAT (OR 5.32, p < 0.001), but, using the complete arthroscopic procedure, there was no difference in proportions of major extrusions between medial and lateral MAT (OR 0.28, p = 0.08).


Graft extrusions after medial and lateral MAT differed according to surgical technique. Graft extrusion was greater after medial than lateral MAT using the arthroscopic-assisted technique, but was greater after lateral than medial MAT using the complete arthroscopic procedure.

Level of evidence

Meta-analysis (Level II).


Extrusion Meniscus allograft transplantation Medial Lateral Meta-analysis 



This study was supported by SMC-Ottogi Research Fund (SMX1162171).

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.

Ethical approval

This article does not contain any studies with human participants or animals performed by any of the authors.


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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  1. 1.Department of Orthopedic Surgery, Asan Medical Center, College of MedicineUniversity of UlsanSeoulSouth Korea
  2. 2.Department of Preventive MedicineKorea University College of MedicineSeoulSouth Korea
  3. 3.Department of Orthopaedic Surgery, Samsung Medical CenterSungkyunkwan University School of MedicineSeoulSouth Korea

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