A Comparison of Two Surface Materials (Tantalum Versus Titanium Fiber Mesh) of Acetabular Components in Hip Arthroplasty

This study is ongoing, but not recruiting participants.

First Received: June 26, 2005 Last Updated: November 20, 2006 History of Changes

Sponsors and Collaborators:	University of Aarhus Aalborg Hospital Aarhus University Hospital Zimmer, Inc.
Information provided by:	University of Aarhus
ClinicalTrials.gov Identifier:	NCT00116051

Purpose

The purpose of this study is to compare two surface materials (tantalum versus titanium fiber mesh) of acetabular components in hip arthroplasty.

Condition	Intervention
Osteoarthritis	Device: Acetabular implant, Monoblock cup

MedlinePlus related topics: Osteoarthritis

U.S. FDA Resources

Study Type:	Interventional
Study Design:	Treatment, Randomized, Double-Blind, Active Control, Parallel Assignment, Safety/Efficacy Study
Official Title:	A Comparison of Two Surface Materials (Tantalum Versus Titanium Fiber Mesh) of Acetabular Components in Hip Arthroplasty

Further study details as provided by University of Aarhus:

Primary Outcome Measures:

Acetabular component migration evaluated by RSA

Secondary Outcome Measures:

BMD in the surrounding bone of the acetabular implant

Estimated Enrollment:	50
Study Start Date:	September 2004
Estimated Study Completion Date:	January 2006

Detailed Description:

In younger patients, acetabulum components are most often implanted without the use of cement. A direct ingrowth of bone to the implant is crucial to the attainment of good results in those cases where cement is not employed. A new implant material (tantalum) has shown better properties than the implant material which is in use today (titanium). The advantages of tantalum implants are greater porosity, reduced stiffness and a higher friction coefficient than with titanium implants.

Hypothetically, the higher porosity of tantalum should enhance bone ingrowth due to better osteoconductivity in terms of:

less migration of the acetabulum component, as evaluated by RSA;
increased BMD in the bone surrounding acetabulum components;
fewer postoperative complaints on the Harris Hip Score and visual analog scale scores.

The migration of acetabulum components will be evaluated by RSA. The follow-up RSA will be scheduled for week 1, as well as 3 months, 12 months and 2 years after surgery. Bone mineral density around the implanted femoral component will be examined by DEXA scan at week 1, as well as 1 year and 2 years after surgery.

Eligibility

Ages Eligible for Study:	50 Years to 70 Years
Genders Eligible for Study:	Both
Accepts Healthy Volunteers:	No

Criteria

Inclusion Criteria:

Patients with primary arthritis in the hip.
Patients with sufficient bone density to allow uncemented implantation of a femoral component.
Informed patient consent in writing.

Exclusion Criteria:

Patients with neuromuscular or vascular disease in the affected leg.
Patients found upon operation to be unsuited for uncemented acetabulum component.
Patients who regularly take non-steroid anti-inflammatory drugs (NSAID) and cannot interrupt intake for the postoperative phase of the study.
Patients with fracture sequelae.
Female patients of childbearing capacity.
Hip joint dysplasia.
Sequelae to previous hip joint disorder in childhood.

Contacts and Locations

Please refer to this study by its ClinicalTrials.gov identifier: NCT00116051

Locations

Denmark
Orthopaedic Center, Aarhus University Hospital,
Aarhus, Denmark, 8000

Sponsors and Collaborators

University of Aarhus

Aalborg Hospital

Aarhus University Hospital

Zimmer, Inc.

Investigators

Principal Investigator:

Kjeld Søballe, MD., Prof.

Orthopaedic Center, Aarhus University Hospital, Aarhus, Denmark

More Information

No publications provided

Study ID Numbers:	200330159
Study First Received:	June 26, 2005
Last Updated:	November 20, 2006
ClinicalTrials.gov Identifier:	NCT00116051 History of Changes
Health Authority:	Denmark: The Danish National Committee on Biomedical Research Ethics

Keywords provided by University of Aarhus:

RSA
DEXA
Osteoarthritis
Hip arthroplasty

Study placed in the following topic categories:

Musculoskeletal Diseases
Osteoarthritis
Joint Diseases
Arthritis
Rheumatic Diseases

Additional relevant MeSH terms:

Musculoskeletal Diseases
Osteoarthritis
Joint Diseases
Arthritis
Rheumatic Diseases

ClinicalTrials.gov processed this record on May 07, 2009