Midterm Outcomes of Reverse (Anteverting) Periacetabular Osteotomy in XXXX With Hip Impingement Secondary to Acetabular Retroversion.

@entity1 @entity1743 @entity572 @entity6349 @entity1141
BACKGROUND: There is a paucity of data on the results of reverse (anteverting) periacetabular osteotomy (RPAO) for treatment of @entity1743 ( @entity1743 ) secondary to acetabular retroversion. PURPOSE: To evaluate the midterm outcomes of RPAO for @entity1743 secondary to acetabular retroversion in those with and without @entity572 . STUDY DESIGN: Cohort study; Level of evidence, 3. METHODS: A retrospective review identified RPAOs performed on @entity1 with acetabular retroversion in isolation or in the setting of @entity1141 (lateral center-edge angle [LCEA]  <=19  ). Acetabular retroversion with @entity1743 was diagnosed clinically and radiographically, with a positive crossover and posterior wall signs on pelvic radiographs. Twenty-three @entity1 (30 hips) met the inclusion criteria; 20 hips with isolated retroversion and 10 hips with retroversion and @entity572 . The average age at the time of the procedure was 26 years (range, 13-45 years). The average length of follow-up was 5 years (range, 2-19 years). @entity572 ( @entity572 ) and radiographs were evaluated preoperatively and at last follow-up. RESULTS: The mean preoperative LCEA was 31   (range, 22  -49  ) in the isolated retroversion group and 9   (range, -4   to 17  ) in the @entity6349 group. Postoperatively, the LCEA in the @entity6349 group increased to 35   (range, 15  -46  ) (P = .0001). The crossover sign corrected in 55% (11/20) of the isolated retroversion group and 80% (8/10) of the @entity6349 group. The acetabular index (mean    SD) improved from 1.3    0.3 to 1.7    0.6 (P = .0001), indicating improved anteversion. At the latest follow-up, the average @entity572 in the isolated retroversion group increased from 58 preoperatively (range, 23-77) to 93 (range, 68-100) (P = .0001); the @entity572 in the @entity6349 group improved from 49 (range, 20-74) to 92 (range, 77-100) (P < .0001). Complication rates were similar in both groups. Excluding hardware removal, additional surgeries were performed in 13% (4/30). CONCLUSION: RPAO performed for @entity1743 in the young @entity1 with isolated acetabular retroversion or retroversion in the setting of @entity1141 successfully improved clinical and radiographic results at mid- to long-term follow-up.
