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

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

COMPLETED

Clinical Phase

NA

Total Enrollment

100 participants

Study Classification

INTERVENTIONAL

Study Start Date

2005-07-26

Study Completion Date

2019-03-26

Brief Summary

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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.

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Detailed Description

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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.

Conditions

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Arthroplasty Complications Hip Arthritis

Study Design

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Allocation Method

RANDOMIZED

Intervention Model

PARALLEL

Primary Study Purpose

HEALTH_SERVICES_RESEARCH

Blinding Strategy

SINGLE

Outcome Assessors

The assessment of the implants was done by a secondary center that was unaware of which the bearing type was in which patient.

Study Groups

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Conventional Polyethylene versus metal head

This is the more conventional group bearing surfaces

Group Type ACTIVE_COMPARATOR