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- Title
Bone-Plug Versus Soft Tissue Fixation of Medial Meniscal Allograft Transplants: A Biomechanical Study.
- Authors
Ambra, Luiz Felipe; Mestriner, Alexandre Barbieri; Ackermann, Jakob; Phan, Amy T.; Farr, Jack; Gomoll, Andreas H.
- Abstract
Background: It is controversial whether soft tissue fixation only and bone-plug techniques for medial meniscal allograft transplantation provide equivalent fixation and restoration of load distribution. Prior studies on this topic did not re-create the clinical situation with use of size-, side-, and compartment-matched meniscal transplants. Hypothesis: Both techniques will provide equivalent fixation of the meniscal transplant and restore load distribution and contact pressures similar to those of the native knee. Study Design: Controlled laboratory study. Methods: Nine fresh-frozen human cadaveric knees underwent mean contact pressure, mean contact area, and peak contact pressure evaluation in 4 medial meniscal testing conditions (native, total meniscectomy, bone-plug fixation, and soft tissue fixation) at 3 flexion angles (0°, 30°, and 60°) using Tekscan sensors under a 700-N axial load. Results: Medial meniscectomy resulted in significantly decreased contact area and increased contact pressure compared with the native condition at all flexion angles (P <.0001). Compared with the native state, soft tissue fixation demonstrated significantly higher mean contact pressure and lower mean contact area at 0° and 30° of flexion (P <.05), while bone-plug fixation showed no significant difference. There was no significant difference in peak contact pressure between study conditions. Conclusion: Total medial meniscectomy leads to significantly worsened load distribution within the knee. Medial meniscal allograft transplantation can restore load parameters close to those of the native condition. The bone-plug technique demonstrated improved tibiofemoral contact pressures compared with soft tissue fixation. Clinical Relevance: Medial meniscal allograft transplantation with bone-plug fixation is a viable option to restore biomechanics in patients with meniscal deficiency.
- Subjects
BIOMECHANICS; BONE grafting; DEAD; FEMUR; HOMOGRAFTS; KNEE; MENISCECTOMY; MENISCUS (Anatomy); PRESSURE; SOFT tissue injuries; STATISTICS; TIBIA; DATA analysis; DESCRIPTIVE statistics; KRUSKAL-Wallis Test
- Publication
American Journal of Sports Medicine, 2019, Vol 47, Issue 12, p2960
- ISSN
0363-5465
- Publication type
Article
- DOI
10.1177/0363546519870179