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J Knee Surg 2017; 30(05): 493-500
DOI: 10.1055/s-0036-1593363
Original Article
Thieme Medical Publishers 333 Seventh Avenue, New York, NY 10001, USA.

Modified Elmslie–Trillat Procedure for Recurrent Dislocation of the Patella

Genya Mitani
1   Department of Orthopaedic Surgery, Tokai University Oiso Hospital, Oiso Naka-gun, Kanagawa, Japan
,
Takashi Maeda
2   Department of Orthopaedic Surgery, Surgical Science, Tokai University School of Medicine, Isehara, Kanagawa, Japan
,
Tomonori Takagaki
2   Department of Orthopaedic Surgery, Surgical Science, Tokai University School of Medicine, Isehara, Kanagawa, Japan
,
Kosuke Hamahashi
2   Department of Orthopaedic Surgery, Surgical Science, Tokai University School of Medicine, Isehara, Kanagawa, Japan
,
Kenji Serigano
2   Department of Orthopaedic Surgery, Surgical Science, Tokai University School of Medicine, Isehara, Kanagawa, Japan
,
Yutaka Nakamura
3   Department of Physical Recreation, School of Physical Education, Tokai University, Hiratsuka, Kanagawa, Japan
,
Masato Sato
2   Department of Orthopaedic Surgery, Surgical Science, Tokai University School of Medicine, Isehara, Kanagawa, Japan
,
Joji Mochida
3   Department of Physical Recreation, School of Physical Education, Tokai University, Hiratsuka, Kanagawa, Japan
› Author Affiliations
Further Information

Publication History

03 May 2016

10 August 2016

Publication Date:
03 October 2016 (online)

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Abstract

Many groups have reported good to excellent clinical outcomes of the Elmslie–Trillat (ET) procedure for recurrent dislocation of the patella. However, the mean follow-up period of these studies was no more than 5 years. We hypothesized that the long-term postoperative outcomes of the modified ET procedure for recurrent dislocation of the patella would be acceptable compared with those of other procedures. The long-term postoperative outcomes of patients treated with the modified ET procedure were examined. A total of 31 knees in 27 patients with recurrent dislocation of the patella who underwent a modified ET procedure (without medial capsular plication) were evaluated. The mean follow-up period was 13.0 years. Pre- and postoperative radiographs were examined to determine the Q-angle, tilting angle, lateral shift ratio, sulcus angle, congruence angle, and Insall–Salvati index. Clinical outcomes were evaluated based on the Fulkerson patellofemoral joint evaluation score, Kujala score, and the presence of the apprehension sign. Radiological evaluation revealed significant postoperative improvements in the Q-angle, tilting angle, lateral shift ratio, congruence angle, Kujala score, and Fulkerson score (p < 0.001). Sixty-eight percent of all patients had a “good” or “excellent” Fulkerson score. The apprehension sign continued to be shown for six knees. Progression of osteoarthritic changes was observed in three knees, and one knee was symptomatic. The modified ET procedure provided satisfactory outcomes based on radiological and clinical evaluations. These results show the long-term effectiveness and safety of the modified ET procedure for recurrent patellar dislocation.

Keywords

Elmslie–Trillat procedure - recurrent dislocation of the patella - long-term clinical outcomes
 

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