Intraoperative medial wall disruption in Dega pelvic osteotomy: Does it effect the radiographic outcome at medium-term?

OBJECTIVES

To compare the radiographic outcomes of our patients who encountered medial wall disruption, with those who did not while undergoing Dega osteotomy.

METHODS

We retrospectively reviewed the records of 95 hips with developmental dysplasia of the hip who were treated with Dega pelvic osteotomy. Hips were divided into 2 groups according to medial wall disruption: group A included the hips with medial wall disruption, while group B included the hips without disruption. Preoperative, immediate postoperative, 12 weeks and last follow-up anteroposterior radiographs of the pelvis were reviewed for changes in the acetabular index (AI) between groups.

RESULTS

There were 22 hips in group A and 73 hips in the group B. Preoperative (34.6 versus [vs] 37.2, =0.231), postoperative (17.9 vs 18.4, =0.682), 12th week (18 vs 18, =0.504) and last follow-up (13.3 vs 15.1, =0.097). The acetabular index measurements were comparable between the groups. Corrections achieved during surgery, and during the follow-up period were also comparable between the two groups, indicating no loss of radiographic correction caused by medial wall disruption. Ninety one percent of the patients in group A and 90% of group B achieved good or excellent results according to the Severin classification (=0.944).

CONCLUSION

Our study shows that disruption of the medial wall did not have a significant detrimental effect on radiographic correction when performing Dega osteotomy.