Bone Remodeling Around HA-coated Acetabular Cups.

NCT ID: NCT00159497

Last Updated: 2014-03-31

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

100 participants

Study Classification

INTERVENTIONAL

Study Start Date

1998-10-31

Study Completion Date

2011-01-31

Brief Summary

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This study was designed to investigate the influence of HA-coating on bone remodeling around the cup in cementless THA.

100 patients gave informed consent to participate in a controlled randomized study between porous coated Trilogy® versus Trilogy Calcicoat®. The cup was inserted in press-fit fixation. The femoral component was a cementless porous coated titanium alloy stem (Bi-Metric®), with a modular 28 mm CrCo head. Effect parameters were Harris Hip Score (HHS) and Bone Mineral Density (BMD) determined by DEXA scanning.

Measurements revealed no difference between the two groups after 3 years, neither in clinical outcome nor in terms of periprosthetic bone density. Patients with Body Mass Index above normal regained more bone mineral than patients with normal weight. This finding supports the assumption that load is beneficial to bone remodeling. Advantages of better sealing of the bone-prosthesis interface, preventing polyethylene induced osteolysis, may still be anticipated for the 7 or 12 year follow-up examinations

Detailed Description

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This study was designed to investigate the influence of HA-coating on bone remodeling around the cup in cementless THA.

100 patients gave informed consent to participate in a controlled randomized study between porous coated Trilogy® versus Trilogy Calcicoat®. The cup was inserted in press-fit fixation. The femoral component was a cementless porous coated titanium alloy stem (Bi-Metric®), with a modular 28 mm CrCo head. Effect parameters were Harris Hip Score (HHS) and Bone Mineral Density (BMD) determined by DEXA scanning.

Measurements revealed no difference between the two groups after 3 years, neither in clinical outcome nor in terms of periprosthetic bone density. Patients with Body Mass Index above normal regained more bone mineral than patients with normal weight. This finding supports the assumption that load is beneficial to bone remodeling. Advantages of better sealing of the bone-prosthesis interface, preventing polyethylene induced osteolysis, may still be anticipated for the 7 or 12 year follow-up examinations

Conditions

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Coxarthrosis

Study Design

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Allocation Method

RANDOMIZED

Intervention Model

PARALLEL

Primary Study Purpose

TREATMENT

Blinding Strategy

SINGLE

Participants

Study Groups

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1

Standard porouscoated Trilogy Cup

Group Type ACTIVE_COMPARATOR

porous coated Trilogy®

Intervention Type DEVICE

THA

2

HA coated Trilogy cup

Group Type EXPERIMENTAL

Trilogy Calcicoat®

Intervention Type DEVICE

THA

Interventions

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porous coated Trilogy®

THA

Intervention Type DEVICE

Trilogy Calcicoat®

THA

Intervention Type DEVICE

Other Intervention Names

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Zimmer Zimmer

Eligibility Criteria

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Inclusion Criteria

* Patients eligible for cementless THA

Exclusion Criteria

* Medical conditions interfering with bone metabolism
Minimum Eligible Age

18 Years

Maximum Eligible Age

80 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

No

Sponsors

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Northern Orthopaedic Division, Denmark

OTHER

Sponsor Role lead

Responsible Party

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Responsibility Role SPONSOR

Principal Investigators

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Mogens B Laursen, MD

Role: PRINCIPAL_INVESTIGATOR

Northern Orthopaedic Division

Locations

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Northern Orthopaedic Division, Klinik Farsoe, Aalborg University Hospital

Farsø, Northern Jutland, Denmark

Site Status

Countries

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Denmark

Related Links

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Other Identifiers

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ON-04-001-MBL

Identifier Type: -

Identifier Source: org_study_id

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