Preheating of Femur Component in Hybrid Total Hip Arthroplasty

April 9, 2015 updated by: Northern Orthopaedic Division, Denmark

Comparison Between Preheated and Non-preheated Femur Component in Hybrid Total Hip Arthroplasty (THA) A Prospective Randomized Study of the 80 THA Using Radiostereometry.

Background

  • Recently published studies confirm that preheating of femoral component enhances shear strength of implant-cement interface. Both Iesaka et al 2003 and Jafri et al 2004 showed reduction in cement porosity on cement-implant interface with preheated femur components. We will use the radiostereometry analysis (RSA) to investigate how the preheating of femur component influence on prosthesis survivorship. There are no clinical controlled studies performed to the date.

The aim of the study

  • Comparison of the migration rates between preheated and non-preheated femur components, analyzed with RSA.

Methods

  • Randomization of 80 patients into 2 groups with 40 in each. All patients will undergo standard hybrid total hip replacement. In group one the femur component (Bi-Metric, Interlock Biomet) will be preheated to 40 degrees of Celsius before cementation. In group two: the control group, the femur component will be of room temperature. We will measure the temperature at cement bone interface during the operation with use of thermocouple electrodes inserted through separate drill hole in the femur. The measurements will be recorded every 10 seconds. The patients will follow the standard postoperative rehabilitation program.
  • The RSA analysis will be performed the first day after the operation and at 3, 12, 24 months postoperatively.
  • The Dual-energy X-ray absorptiometry scanning (DEXA) of the femur will be performed at the first week after the operation and at 12 and 24 months postoperatively.
  • The patients will be followed both clinically and radiologically at 1 and 2 years after the operation (Harris Hip Score).
  • The results will be expressed as mean + SD (in mm). ANOVA statistical analysis will be used to confirm the differences between the groups.

Study Overview

Status

Completed

Conditions

Intervention / Treatment

Study Type

Interventional

Enrollment (Actual)

80

Phase

  • Phase 2

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • Denmark
      • Farsoe, Denmark, 9640
        • Farsoe Hospital, Northern Orthopaedic Division

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

70 years to 85 years (Older Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Description

Inclusion Criteria:

  • The patients suffering of hip osteoarthritis

Exclusion Criteria:

  • The patients with ASA score >II
  • The patients with cancer
  • The secondary coxarthrosis after the trauma
  • Any vascular or neuromuscular diseases affecting the hip.

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Treatment
  • Allocation: Randomized
  • Interventional Model: Parallel Assignment
  • Masking: Double

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Time Frame
Stem migration in mm
Time Frame: 2 years
2 years

Secondary Outcome Measures

Outcome Measure
Time Frame
Bone mineral density g/cm2
Time Frame: 2 years
2 years
Temperature at bone-cement interface, degrees in Celsius
Time Frame: peroperatively
peroperatively
Serum- Titanium measurements in blood samples
Time Frame: Not defined
Not defined

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Northern Orthopaedic Division, Denmark

Investigators

  • Principal Investigator: Mogens B Jørgensen, M.D., Northern Orthopaedic Division, Aalborg University Hospital, Denmark
  • Principal Investigator: Mogens B Laursen, M.D., Ph.D, Northern Orthopaedic Division, Aalborg University Hospital, Denmark
  • Principal Investigator: Lotte Borgwardt, dr., Frederikberg Hospital, Copenhagen
  • Study Chair: Kjeld Søballe, Ph.D., MD., University Hospital of Aarhus
  • Study Director: Poul T Nielsen, M.D., Northern Orthopaedic Division, Aalborg University Hospital, Denmark

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start

May 1, 2006

Primary Completion (Actual)

April 1, 2010

Study Completion (Actual)

April 1, 2010

Study Registration Dates

First Submitted

April 27, 2006

First Submitted That Met QC Criteria

April 27, 2006

First Posted (Estimate)

April 27, 2006

Study Record Updates

Last Update Posted (Estimate)

April 10, 2015

Last Update Submitted That Met QC Criteria

April 9, 2015

Last Verified

April 1, 2015

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • ON-04-008a-JPE

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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