![]() The maximum contact pressure (MPa) in the tibial plateau was significantly higher in the extrusion group (0.37 0.35, 0.40) than in the intact (0.29 0.21, 0.37) or the centralization (0.29 0.22, 0.36) groups. The contact area (mm2) in the middle of the meniscus was significantly smaller in the extrusion group (45.8 18.5, 73.2) than in the intact (85.7 72.1, 99.2) or the centralization (98.3 88.8, 107.8) groups. Meniscus extrusion was evaluated using two markers put on the posterior cruciate ligament and the lateral meniscus, and the load distribution were assessed using a pressure mapping sensor system after applying a loading force of 200 N to the knee joint.ĭistance between two markers (mm, Average 95% CI) was larger in the extrusion group (21.9 17.8, 25.6) than in the intact (18.1 15.1, 22.7) or the centralization (15.3 12.9, 18.0) groups. Six porcine knee joints were analyzed in a universal tester, as follows: 1) Intact 2) Extrusion (meniscus extrusion was created by resecting the posterior root of the lateral meniscus, as well as the posterior synovial capsule) and 3) Centralization (two anchors were inserted at the lateral tibial plateau, and the meniscus was sutured to secure it close to the original position). The purpose of this study was to investigate the biomechanical properties of load distribution following a centralization procedure for extruded lateral menisci with posterior root deficiency in a porcine model. ![]() Change of the JSW in the centralization group was significantly greater than that in the control group 2 years postoperatively (Control group: -0.1 mm, Centralization group: 0.8 mm P =0.03).Ĭonclusion Change of JSW after OWHTO aimed at neutral alignment with arthroscopic centralization for extruded medial meniscus was greater than solely OWHTO, and there was no significant difference in the short-term clinical outcomes between the 2 procedures at the final follow-up. Results IKDC subjective scores, KOOS subgroup scores, patient subjective satisfaction scores, and Lysholm score did not show significant differences between the two groups at the final follow-up. ![]() Patient demographic data were also reviewed. Radiographic changes of JSW and joint line congruence angle (JLCA) were measured 2 years postoperatively. Lysholm knee scale, International Knee Documentation Committee (IKDC) subjective score, Knee Osteoarthritis Outcome Score (KOOS), and patient subjective satisfaction scores were recorded at the final follow-up. Fourteen patients, who underwent solely OWHTO, were included in the control group. Twenty-one knee osteoarthritis patients, who underwent the OWHTO with arthroscopic meniscal centralization, were included in the centralization group. Thirty-five patients included for analysis after exclusion criteria was applied. Methods A retrospective review of 50 primary OWHTO patients was conducted. The purpose of the present study was to compare short-term clinical and radiological outcomes of medial joint space width (JSW) after the OWHTO aimed at neutral alignment with and without arthroscopic centralization for an extruded medial meniscus. Purpose To improve long-term outcomes of open-wedge high tibial osteotomy (OWHTO), procedures combining OWHTO aimed at neutral alignment and arthroscopic centralization for meniscal extrusion have been introduced.
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