Patellar suture anchors and semi-tunneling polyetheretherketone suture anchors for double-bundle reconstruction of medial patellofemoral ligament

doi:10.12307/2022.507

Abstract

Abstract: BACKGROUND: The main treatment methods for recurrent patellar dislocation are medial patellofemoral ligament reconstruction, medial patellofemoral ligament formation, lateral patellofemoral ligament loosening, gluteal muscle contracture loosening, and tibial tubercle displacement surgery. At present, double-bundle anatomical reconstruction of medial patellofemoral ligament is mostly used.
OBJECTIVE: To compare the efficacy of tendon fixation with suture anchors and tendon fixation with semi-tunneling polyetheretherketone suture anchors in the treatment of recurrent patellar dislocation under the condition of double-bundle reconstruction of medial patellofemoral ligament.
METHODS: Totally 57 cases who were diagnosed as recurrent patellar dislocation in Sixth Affiliated Hospital of Xinjiang Medical University from January 2017 to April 2018 received parallel medial patellofemoral ligament revascularization, aged between 16 and 26 patients, including 19 males and 38 females. The graft was autologous semitendinosus muscle. Among them, 26 cases received graft fixation with suture anchors, and 31 cases received graft fixation with semi-tunneling polyetheretherketone suture anchors. After surgery, follow-up was conducted to record patellar redislocation, fracture and other complications, patellar tilt angle, and Kujala score of the affected knee.
RESULTS AND CONCLUSION: (1) During 36-month follow-up, 57 patients did not affect unhealed incision, patellar redislocation, or patellar fracture. In the suture anchor group, four patients experienced pain at femoral insertion point and one patient suffered from persistent pain at ligament and femoral insertion point. In the polyetheretherketone suture anchor group, five patients affected pain at femoral insertion point. No significant difference in the incidence of pain was found between the two groups (P > 0.05). (2) There was no significant difference in Kujala function score of knee joint at 18 and 36 months after operation between the two groups (P > 0.05). (3) Patellar tilt angle was larger in the suture anchor group than that in the polyetheretherketone suture anchor group at postoperative 36 months (P < 0.05). (4) The results suggest that the suture anchor and semi-tunneling polyetheretherketone suture anchor for double-bundle reconstruction of medial patellofemoral ligament can effectively treat recurrent patellar dislocation and improve the function of the affected knee. However, semi-tunneling polyetheretherketone suture anchor improves the patellar tilt angle more significantly.

Key words: patellar dislocation, medial patellofemoral ligament, suture anchors, polyetheretherketone suture anchors, patellofemoral joint, patellar tilt angle, double-bundle reconstruction, anatomic reconstruction

CLC Number:

Han Mingzhan, Maihemuti·Yakufu, Chen Hongtao, Liu Jianjiang, Abudusufu·Kuwan, Aierken·Amudong. Patellar suture anchors and semi-tunneling polyetheretherketone suture anchors for double-bundle reconstruction of medial patellofemoral ligament[J]. Chinese Journal of Tissue Engineering Research, 2022, 26(12): 1854-1860.

Figures/Tables 8

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