An Assessment of 4 Different Bearing Types in Hip Replacement Types to Analsye the Lowest Wear Rates of Polyethylene

Arthroplasty Complications Clinical Trial

Official title: Randomized Control Trial of Four Bearing Surfaces in Primary Total Hip Arthroplasty in Patients Over the Age of 18 Years

Status Completed

Clinical Trial Summary

The aim of the study is to assess the ideal bearing surfaces in hip replacement by comparing 4 different combinations. In a hip replacement this means what the head and the socket liner are made of.

Clinical Trial Description

In hip replacements, arguably the most important thing for survivorship is what rubs against what.

Traditionally surgeons used metal (Cobalt-Chrome) against a conventional polyethylene (plastic). More recently (around 15 years ago) a newer more dense type of polyethylene (called XLPE) had been developed and a new type of head called Oxidized Zirconium was also developed.

In this trial, adults who were undergoing hip replacements were randomized assigned into one of the four groups:

Group 1: old plastic vs metal head Group 2: Old plastic against Oxidized Zirconium Group 3:

New plastic versus metal head Group 4 New plastic vs Oxidized Zirconium

All patients were followed up for a minimum of 10 years to assess which group wore the most amount of polyethylene and which group had the best survival rate. ;

Related Conditions & MeSH terms

• Arthroplasty Complications
• Hip Arthritis

• NCT number: NCT03900039
• Study type: Interventional
• Source: St. Michael's Hospital, Toronto
• Status: Completed
• Phase: N/A
• Start date: July 26, 2005
• Completion date: March 26, 2019