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- Title
Meniscal allograft subluxations are not associated with preoperative native meniscal subluxations.
- Authors
Lee, Bum-Sik; Bin, Seong-Il; Kim, Jong-Min; Kim, Jae; Lim, Eic; Kim, Jae Hyan; Lim, Eic Ju
- Abstract
<bold>Purpose: </bold>To determine the relationship between preoperative subluxation of the original menisci and postoperative graft subluxation after lateral meniscal allograft transplantation (MAT).<bold>Methods: </bold>Forty patients who underwent isolated lateral MATs in meniscus-deficient knees with a low-grade chondral lesion (≤ICRS grade 2) were assessed. Lateral subluxation of the native meniscus before meniscectomy and those of remaining meniscal tissue before MAT were measured on mid-coronal MRI scans taken at each time point. Postoperative meniscal subluxation was assessed using MRI at 6 months postoperatively, when the full rehabilitation protocols were completed. Correlation analyses were conducted to determine the associations between each of two preoperative lateral displacements and the postoperative graft subluxation.<bold>Results: </bold>The mean lateral subluxations before primary meniscectomy and before MAT were 0.3 ± 1.0 mm and 0.2 ± 0.8 mm, respectively. At 6 months postoperatively, it was 2.3 ± 1.9 mm. There were no significant correlations between the preoperative subluxation at the two preoperative time points and the postoperative extrusion (Spearman rho 2-sided test: ρ = - 0.058, (n.s.) for the native meniscus; Pearson r 2-sided test, r = 0.309, (n.s.) for the remaining meniscal rim). Between the postoperative nonextruded and extruded groups, there were no significant differences for the preoperative subluxations.<bold>Conclusions: </bold>There are no associations between preoperative lateral subluxation of the native menisci and postoperative subluxation of meniscal transplants in patients who undergo MAT on the lateral compartment with low-grade arthritic changes. The extrusion phenomenon may be a distinct feature of transplanted menisci rather than an individual characteristic of meniscal displacement. Surgeons need to keep in mind that graft extrusion in nonarthritic knees might occur during transplantation.<bold>Level Of Evidence: </bold>IV.
- Subjects
PREOPERATIVE care; SUBLUXATION; MENISCUS surgery; HOMOGRAFTS; ARTHRITIS
- Publication
Knee Surgery, Sports Traumatology, Arthroscopy, 2017, Vol 25, Issue 1, p200
- ISSN
0942-2056
- Publication type
journal article
- DOI
10.1007/s00167-016-4336-2