J. Zeichen et al., Medium-term results of the operative treatment of recurrent patellar dislocation by Insall proximal realignment, KNEE SURG S, 7(3), 1999, pp. 173-176
Between 1984 and 1991, 36 patients with the diagnosis of recurrent patellar
dislocation were treated operatively using the proximal realignment proced
ure. Thirty patients were available for followup. The average follow-up per
iod was 6.3 years (range 2-9.6 years). The average age at injury was 21.3 y
ears with a predominance of female patients. At follow-up all knees were ph
ysically examined. The results were evaluated using the score of Larsen and
Lauridsen as well as the Tegner score and subjective assessment. Radiograp
hs from 19 patients (63%) were available for review. At follow-up one patie
nt suffered from a recurrence of patellar dislocation. All patients had sta
ble knee joints and a full range of motion. There was no statistically sign
ificant difference between pre- and postoperative sports activity level. Se
ven patients (23.3%) had excellent results, 12 patients (39.9%) good result
s and 1 a poor result using the Larsen and Lauridsen score. Subjective asse
ssment revealed the operative result as very good, good or satisfactory in
90%. Patellofemoral osteoarthritis was seen in 7 of 19 patients (36.8%). Wi
th a proximal realignment procedure good clinical results can be achieved f
or recurrent patellar dislocation. Subjective satisfaction with this proced
ure is rated as good. It is successful in preventing redislocation.