Objectives: The objective of this study was to assess the functional, satisfaction, and quality of life of patients before and after total hip arthroplasty (THA) for different types of dysplastic hips.

Methods: This single-group clinical trial included patients with hip dysplasia who underwent THA at Imam Reza and Ghaem hospitals in Mashhad, Iran, from 2018 to 2022. Data collected for each patient included surgical descriptions, pain levels assessed using the visual analog scale (VAS), scores from the hip dysfunction and osteoarthritis outcome score (HOOS), Harris hip scores (HHS) questionnaires, quality of life (QOL), leg length discrepancy (LLD), and abductor muscle strength measured before and at least two years after surgery. Statistical significance was determined using a P-value of less than 0.05.

Results: The study included 43 dysplastic hips, with eight (18.60%) male and 35 (81.40%) female, and a mean age of 28.43 ± 10 years. Functional response to THA was significantly better in the before than after surgery (mean score improvements: HHS 31.1 versus 24.6 (P < 0.001), HOOS 61.4 versus 47.2 (P < 0.001), VAS 22.3 versus 16.5 (P = 0.003), QOL 18.4 versus 8.4 (P < 0.001)), and LLD 18.4 versus 8.4 (P < 0.001)). However, there was no significant relationship between the preoperative and postoperative complication rates (P> 0.05).

Conclusions: The assessment of THA outcomes in patients with DDH demonstrated that this procedure, irrespective of the surgical approach, instrument, and type of osteotomy used for shortening, resulted in enhanced function, increased patient satisfaction, and improved quality of life, while concurrently reducing pain.