Bearing surfaces in primary total hip arthroplasty

Area of Science:

• Orthopaedic surgery
• Biomaterials science
• Tribology

Background:

• Total hip arthroplasty (THA) is a highly successful procedure, but late revisions are often caused by osteolysis and wear.
• Bearing surface failure is a primary concern in THA longevity.

Purpose of the Study:

• To evaluate the advantages and disadvantages of different bearing surfaces used in THA.
• To provide practical, evidence-based suggestions for selecting the most suitable bearing surface for individual patients.

Main Methods:

• Review of current literature comparing bearing surfaces in THA.
• Analysis of tribological properties and long-term outcomes of various bearing materials.

Main Results:

• Several bearing options exist for THA, including ceramic-on-ceramic (CoC), ceramic-on-polyethylene (CoPE), and metal-on-polyethylene (MoPE).
• Short- to mid-term survivorship is similar for top-performing bearing surfaces (CoC, CoXLPE, MoXLPE).
• Current selection is often experience-based rather than evidence-based.

Conclusions:

• Understanding the tribology of THA bearing surfaces is crucial for improving long-term implant survival.
• Evidence-based selection of bearing surfaces can lead to better patient outcomes and fewer revisions.