Background
Periacetabular osteotomy (PAO) is the standard treatment for developmental dysplasia of the hip (DDH). Although intra-articular pathology such as labral tears is common, the benefit of routinely combining PAO with hip arthroscopy is uncertain. Evaluating the frequency and indications for arthroscopy after isolated PAO is key to determining whether PAO alone adequately addresses intra-articular disease and to guide surgical decision-making.
Methods
This retrospective cohort study included 59 patients who underwent PAO for symptomatic DDH between January 1, 2018, to October 1, 2023, at a single tertiary academic center. Those without a minimum of one-year follow-up were contacted by phone for data collection. Preoperative imaging and postoperative outcomes were reviewed. A follow-up phone survey was conducted at a median of 2.6 ± 1.5 years postoperatively. The primary outcome was the incidence of subsequent hip arthroscopy. Secondary outcomes included persistent pain, imaging findings, and patient-reported interest in future surgery. Comparative analyses were performed between those who did and did not undergo arthroscopy.
Results
A total of 59 patients were included, with 53 (89.8 %) successfully completing phone interviews. The mean preoperative LCEA was 15.0° ±6.8, and the mean postoperative LCEA was 28.8° ±2.1, with an average change of 14.2°. Labral tears were identified in 31 of 51 (60.7 %) patients who had preoperative MRIs. Hip arthroscopy was performed in 4 (6.8 %) patients postoperatively. Of the patients contacted, 47 (88.7 %) reported no interest in future arthroscopy, while 2 (3.8 %) expressed potential interest. The 6 patients not reached had no documented evidence of follow-up surgery or continued symptoms.
Conclusion
Preoperative labral tears are common in patients undergoing PAO, but only a small percentage require subsequent arthroscopic intervention based on our findings. Larger studies are needed to further assess the role of arthroscopy in DDH.
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