Total hip arthroplasty in patients with dwarfism

Area of Science:

• Orthopedic Surgery
• Rheumatology
• Genetics

Background:

• Osteochondrodysplasia often leads to early hip osteoarthritis and the need for total hip arthroplasty (THA).
• Outcomes of THA in young patients with osteochondrodysplasia are not well-established.
• This study investigates long-term outcomes of THA in this specific patient population.

Purpose of the Study:

• To evaluate the long-term clinical and radiographic outcomes of total hip arthroplasty (THA).
• To assess the efficacy and complication rates of THA in patients with osteochondrodysplasia.
• To understand the functional improvement and revision rates in this cohort.

Main Methods:

• Retrospective review of 62 THAs in 37 patients with osteochondrodysplasia from 1971-1997.
• Average patient height was 142 cm; average age at surgery was 37 years.
• Clinical follow-up using Harris hip score (mean 12.8 years) and radiographic follow-up (mean 11.5 years).

Main Results:

• Significant improvement in Harris hip scores from 57 to 87 (p < 0.0001).
• 18 hips (30%) required revision arthroplasty, primarily due to aseptic loosening (14 hips).
• Other complications included deep infection, periprosthetic fractures, and osteolysis.

Conclusions:

• Total hip arthroplasty in osteochondrodysplasia patients has a high complication rate, including fractures and mechanical failures.
• Young age, severe deformities, and polyarticular involvement may contribute to these complications.
• Despite complications, THA effectively alleviates pain and improves function in advanced hip arthritis due to osteochondrodysplasia.