A Randomised Single Centre Study to Compare the Long-term Wear Characteristics of Marathon™ and Enduron™ Polyethylene Cup Liners in Primary Total Hip Replacement

NCT ID: NCT00208442

Last Updated: 2017-06-26

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

PHASE4

Total Enrollment

122 participants

Study Classification

INTERVENTIONAL

Study Start Date

2001-06-01

Study Completion Date

2013-09-01

Brief Summary

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The purpose of this study is to compare the performance and compare the wear characteristics of two polyethylene cup liners, Marathon™ and Enduron™, in the treatment of patients with hip joint disease requiring a total hip replacement. Patients who enter the study will be randomly allocated to one of the polyethylene cup liners, Marathon™ or Enduron™ and will be evaluated at regular intervals using clinical and x-ray assessments.

Detailed Description

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The original protocol intended to perform clinical assessment using the Harris Hip Score, Merle D'Aubigne score and UCLA Activity Level Rating at 6 months, 1 year, 2 years, 3 years, 4 years, 5 years and 10 years post-operative. Merle D'Aubigne score evaluation was removed per Amendment 2.

However, protocol-specified data collected included only the linear and volumetric wear and incidence and pattern of radiological signs at 10 years post surgery. Data collected outside of the protocol included Oxford Hip Score and SF-12 for mental and physical well-being at 10 years post surgery and revision for any reason.

Conditions

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Osteoarthritis Post-traumatic Arthritis Collagen Disorders Avascular Necrosis Traumatic Femoral Fractures Nonunion of Femoral Fractures Congenital Hip Dysplasia Slipped Capital Femoral Epiphysis

Study Design

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Allocation Method

RANDOMIZED

Intervention Model

PARALLEL

Primary Study Purpose

TREATMENT

Blinding Strategy

TRIPLE

Participants Investigators Outcome Assessors

Study Groups

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Marathon™

Moderately cross-linked polyethylene liner in a modular acetabular component

Group Type ACTIVE_COMPARATOR

Marathon™

Intervention Type DEVICE

Moderately cross-linked polyethylene liner in a modular acetabular component

Enduron™

Standard UHMWPE polyethylene liner in a modular acetabular component

Group Type ACTIVE_COMPARATOR

Enduron

Intervention Type DEVICE

Standard polyethylene liner in a modular acetabular component

Interventions

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Marathon™

Moderately cross-linked polyethylene liner in a modular acetabular component

Intervention Type DEVICE

Enduron

Standard polyethylene liner in a modular acetabular component

Intervention Type DEVICE

Eligibility Criteria

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Inclusion Criteria

i) Male or female subjects, aged between 45 and 75 years inclusive.

ii) Subjects who are able to give voluntary, written informed consent to participate in this investigation and from whom consent has been obtained.

iii) Subjects who, in the opinion of the Investigator, are able to understand this investigation, co-operate with the investigational procedures and are willing to return to the hospital for all the required post-operative follow-ups.

iv) Subjects with non-inflammatory arthritis of the hip who require a primary hip arthroplasty and are considered by the Clinical Investigator to be suitable for a cemented femoral component and an uncemented acetabular component.

v) Subjects who have a Charnley C classification

vi) Subjects who have undergone a contralateral hip replacement within past 6 months

vii) Subjects with a poorly functioning contralateral hip replacement or one which has been identified as requiring revision

viii) The first hip replacement scheduled for subjects identified as requiring primary bi-lateral hip replacements which will not be conducted simultaneously (i.e. on the same day).

Exclusion Criteria

i) Subjects who, in the opinion of the Investigator, have an existing condition that would compromise their participation and follow-up in this study.

ii) Women who are pregnant.

iii) Subjects who are known drug or alcohol abusers or with psychological disorders that could effect follow-up care or treatment outcomes.

iv) Subjects who have participated in a clinical study with an investigational product in the last month.
Minimum Eligible Age

45 Years

Maximum Eligible Age

75 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

No

Sponsors

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DePuy International

INDUSTRY

Sponsor Role lead

Responsible Party

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Responsibility Role SPONSOR

Locations

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University Otago, Wellington Medical School of Medicine

Wellington, , New Zealand

Site Status

Countries

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New Zealand

References

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Calvert GT, Devane PA, Fielden J, Adams K, Horne JG. A double-blind, prospective, randomized controlled trial comparing highly cross-linked and conventional polyethylene in primary total hip arthroplasty. J Arthroplasty. 2009 Jun;24(4):505-10. doi: 10.1016/j.arth.2008.02.011. Epub 2008 Jun 10.

Reference Type RESULT
PMID: 18547784 (View on PubMed)

Mutimer J, Devane PA, Adams K, Horne JG. Highly crosslinked polyethylene reduces wear in total hip arthroplasty at 5 years. Clin Orthop Relat Res. 2010 Dec;468(12):3228-33. doi: 10.1007/s11999-010-1379-4.

Reference Type RESULT
PMID: 20458640 (View on PubMed)

Other Identifiers

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CT99/31

Identifier Type: -

Identifier Source: org_study_id

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