The effect of isolated medial patellofemoral ligament reconstruction versus non-distalizing tibial tubercle anteromedialization on patellar height: a radiographic comparison


Ekinci M., Ersin M., Kocazeybek E., Savran F., Yilmaz M., ERGİN Ö. N.

Knee, cilt.61, 2026 (SCI-Expanded, Scopus) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 61
  • Basım Tarihi: 2026
  • Doi Numarası: 10.1016/j.knee.2026.104436
  • Dergi Adı: Knee
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, CINAHL, EMBASE, MEDLINE
  • Anahtar Kelimeler: Medial patellofemoral ligament reconstruction, Patella alta, Patellofemoral instability, Tibial tubercle anteromedialization, Tibial tubercle osteotomy
  • İstanbul Üniversitesi Adresli: Evet

Özet

Background: The objective of our study was to compare the patellar height changes of isolated MPFL reconstruction and anteromedialization tibial tubercle osteotomy (AMTTO) without distalization. Methods: A retrospective review was performed on patients with patellofemoral instability who underwent isolated AMTTO or isolated MPFL reconstruction between May 2019 and October 2024. Patellar height measurements were performed on preoperative and 6-month postoperative lateral radiographs for each patient. The Caton-Deschamps Index (CDI), Modified Insall-Salvati Index (MISI), and Blackburne- Peel Index (BPI) were used to measure patella height. The changes in patella height were calculated and used to compare the AMTTO and MPFL reconstruction groups. Results: A total of 81 patients were included in the study, with a mean age of 18.7±4.4 years. Thirty-six patients included in the study underwent isolated MPFLR, and 45 patients underwent AMTTO without distalization. There was no statistically significant difference between the MPFLR and AMTTO groups in the amount of decrease in patellar height indices. In 7 (70%) patients in the MPFL group and 17 (65%) patients in the AMTTO group, the patellar height returned from patella alta to patella norma. The rate of improvement in patellar height was similar between the two groups (p = 0.792). In the subgroup analysis, patients with preoperative patella alta (CDI > 1.20) showed a similar decrease in mean patellar height using CDI, MISI, and BPI (p = 0.986, p = 0.101, and p = 0.958, respectively). Conclusion: There was no statistically significant difference between the MPFLR and AMTTO groups in the amount of patellar height changes.