Long-term Outcomes of Conical Tapered Stems in Cementless Total Hip Arthroplasty Due to Congenital Hip Pathologies

Retrospective Study About the Long-term Outcomes of Conical Tapered Stems in Cementless Total Hip Arthroplasty for Osteoarthritis Due to Congenital Hip Pathologies

A retrospective consecutive population of patients treated with conical tapered stems in cementless total hip arthroplasty for osteoarthritis due to congenital hip pathologies will be selected. The aim of this retrospective study is to evaluate the long-term clinical and radiographic results of this implant and the survival rates in such a specific cohort.

Congenital hip pathologies may severely alter the local anatomy of the hip, making total hip arthroplasty (THA) due to osteoarthritis after congenital hip pathologies challenging. While it seems that congenital hip pathologies did not significantly influence the outcomes when compared to THA after osteoarthritis, the choice of implant was demonstrated to impact the survival rates of the THA after congenital hip pathologies.

To date, no guidelines exist about the correct choice of hip implant in congenital hip pathologies: only mid-term case series are available. Conical tapered stems have been frequently suggested for the most difficult cases.

The aim of this study is to describe the survival rates and the long-term clinical and radiological outcome of conical tapered stems in THAs after congenital hip pathologies.

Inclusion Criteria:

• Symptomatic hip osteoarthritis due to congenital hip pathologies
• Consecutive population with a minimum follow-up of 2 years
• Cementless total hip arthroplasty with conical tapered stem
• Pre-operative planning using CT
• Complete clinical and radiographic assessment

Exclusion Criteria:

• Other type of hip osteoarthritis
• Other type of implants
• Inadequate pre-operative planning (eg: no CT)
• Incomplete clinical and radiographic assessment