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Roentgen Stereophotogrammetric Analysis (RSA) and Dual Energy X-ray Absorptiometry (DEXA) to Evaluate Fixation of Periapatite Coated Triathlon Total Knee Arthroplasty (TKA) Components

NCT01180582 · Status: COMPLETED · Phase: NA · Type: INTERVENTIONAL · Enrollment: 30

Last updated 2014-03-31

No results posted yet for this study

Summary

The purpose of this study is twofold: 1) to use RSA to determine the migration patterns of the PA coated Triathlon Total Knee Arthroplasty components during the first 2 years postoperatively and thus determine the proportion of cases where adequate fixation is achieved, and 2) to use DEXA scanning to document peri-prosthetic bone mineral density changes in response to the PA coated Triathlon Total Knee arthroplasty over the first two postoperative years.

In addition, gait assessment and validated outcome questionnaires will be utilized to quantify changes in functional status of subjects after surgery and migration patterns will be compared to results obtained from previous studies of uncemented total knee arthroplasty components conducted at this centre. Questions to be asked are: 1. Do the components achieve adequate fixation to the underlying bone? 2. What are the migration patterns (translations and rotations) of the PA coated arthroplasty components during the first two years postoperatively and are they different from that seen for other implants that have been studied with RSA at this institution? 3. For what proportion of implants does migration continue to increase during the two year follow-up? 4. Are inducible displacements, measured at weight-bearing follow-ups, consistent over time and do they indicate that adequate fixation has been achieved? 5. Are there changes over time in bone mineral density of peri-prosthetic bone in the PA coated Triathlon total knee arthroplasty? 6: Where do changes in bone mineral density occur? 7: Is there a significant difference in health status and functional outcome before and after total knee arthroplasty using PA coated Triathlon total knee arthroplasty components? 8: Are there changes in gait symmetry and centre of mass (COM) displacements as assessed with the Walkabout Portable Gait Monitor pre- and post-operatively and how does study gait data compare to asymptomatic gait? and finally, Question 9: Are there differences in the micromotion patterns between the when compared to other samples of knee implants in our RSA database?

Conditions

  • Osteoarthritis, Knee

Interventions

DEVICE

Triathlon Periapatite (PA)-coated Tibial Component

Triathlon Periapatite (PA)-coated Total Knee Arthroplasty Tibial Component for uncemented fixation

Sponsors & Collaborators

  • Stryker Orthopaedics

    collaborator INDUSTRY

  • Nova Scotia Health Authority

    collaborator OTHER

  • Dalhousie University

    lead OTHER

Principal Investigators

  • Michael J Dunbar, FRCSC, PhD · Dalhousie University & Capital District Health Authority

Study Design

Allocation
NA
Purpose
TREATMENT
Masking
NONE
Model
SINGLE_GROUP

Eligibility

Min Age
21 Years
Max Age
80 Years
Sex
ALL
Healthy Volunteers
No

Timeline & Regulatory

Start
2009-04-30
Primary Completion
2013-04-30
Completion
2013-04-30

Countries

  • Canada

Study Locations

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Read the full study record

This page highlights key information. For complete eligibility criteria, study locations, investigator contacts, and the full protocol, visit the original record on ClinicalTrials.gov.

View NCT01180582 on ClinicalTrials.gov