Abstract
Aim: to evaluate outcome following proximal realignment procedure in habitual patellar dislocation.
 Materials and Methods: prospective comparative study was conducted in the Department of Orthopedics Jawaharlal Nehru Medical College, Bhagalpur from jan 2019 to December 2019 among 18 patients who underwent proximal realignment for habitual patellar dislocation with a minimum follow up of 6 months and a maximum follow up of 2 years. Radiological assessment was done by measuring sulcus angle and congruence angle and pain was assessed using VAS scale.
 Results: mean age of the study population was 18.64 years and 55.6% were male and rests 44.4 were female. Mean pre and post operative sulcus angle (132.46, 132.58) and Congruence angle (62.86, 17.81). Two the cases showed recurrence.
 Conclusion: we conclude that following proximal realignment procedure for habitual dislocation of patella radiological parameters were brought back to normal. There were no significant changes in sulcus angle.
 Keywords: patella, habitual dislocation, outcome, proximal realignment
Highlights
Materials and Methods: prospective comparative study was conducted in the Department of Orthopedics Jawaharlal Nehru Medical College, Bhagalpur from jan 2019 to December 2019 among 18 patients who underwent proximal realignment for habitual patellar dislocation with a minimum follow up of 6 months and a maximum follow up of 2 years
Habitual patellar dislocation is a rare condition where the patella dislocates during flexion and relocates during extension unlike chronic patellar dislocation that occurs during both flexion and extension of the knee, and it usually presents without pain or swelling
Hnevkovsky et al.[10] attributed habitual patellar dislocation to contracture of the quadriceps femoris and introduced a technique to lengthen the muscle with the use of a lateral retinacular release and quadricepsplasty, which did not bring about complete flexion in their patients
Summary
Habitual patellar dislocation is a rare condition where the patella dislocates during flexion and relocates during extension unlike chronic patellar dislocation that occurs during both flexion and extension of the knee, and it usually presents without pain or swelling. The incidence of patella dislocation ranges from 6 per 100,000 in the adult population to 43 per 100,000 in the pediatric population. Most common technical errors in distal re-alignment procedures is the failure to correct patellar height.[7,8,9]. Campbell developed the Campbell’s technique as a method of proximal realignment for habitual patellar dislocation. The present study was to evaluate outcome following proximal realignment procedure in patients with habitual patellar dislocation
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