Accuracy of MRI-based Patients Matched Instruments vs Jig-based Instruments in Total Knee Arthroplasty (TKA)

February 21, 2013 updated by: Mahidol University

Accuracy of MRI-based Patients Matched Instruments and Jig-based Instruments in Total Knee Arthroplasty

Total knee arthroplasty (TKA) is the common and effective procedure for treatment of end-staged knee osteoarthritis. Postoperative alignment of TKA is one of the important factors which effects on survival of prosthesis. High percentage of misalignment has been reported in conventional technique with using the jig based instruments. Several methods and devices were established to solve this problem. Customized or patient matched instruments were the novel technology that made from magnetic resonance imaging (MRI) of lower limb. With using special software to calculate the alignment axis, it was thought that accurate alignment can be achieved by using this instruments. Therefore, the study aimed to compare the accuracy of MRI based patient matched instruments and jig based instruments in TKA.

Study Overview

Status

Completed

Conditions

Intervention / Treatment

Study Type

Interventional

Enrollment (Actual)

80

Phase

  • Not Applicable

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

40 years to 85 years (Adult, Older Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Description

Inclusion Criteria:

  • Patients diagnosed primary osteoarthritis of knee and planned to undergo total knee arthroplasty

Exclusion Criteria:

  • Previous complex surgery of the affected knee
  • Metalic implant in the affected lower limb
  • Patients who unable or contraindicated to perform MRI
  • Extra-articular deformities of the affected lower limb
  • Extensive bone loss of distal femur or/and proximal tibia
  • More than 30 degrees of knee flexion contracture
  • Unable to perform TKA within 12 weeks after MRI

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: Single

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Experimental: Group 1
Patient matched instruments
Device: Patient matched instruments
The patients undergo TKA with using patient matched instruments
Other Names:
  • The Zimmer Patient Specific Instruments System
Experimental: Group 2
Jig based instruments
Device: Jig based instruments
The patients undergo TKA with using jig based instruments
Other Names:
  • Zimmer Nexgen LPS MIS system

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Time Frame
The alignment of mechanical axis after TKA
Time Frame: Within 1 month after operation
Within 1 month after operation

Secondary Outcome Measures

Outcome Measure
Time Frame
The alignment of femoral and tibial components after TKA
Time Frame: Within 1 month after operation
Within 1 month after operation

Collaborators and Investigators

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

Sponsor

Mahidol University

Investigators

  • Principal Investigator: Keerati Charoencholvanich, MD, Mahidol University

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

General Publications

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

April 1, 2011

Primary Completion (Actual)

October 1, 2011

Study Completion (Actual)

October 1, 2011

Study Registration Dates

First Submitted

October 6, 2011

First Submitted That Met QC Criteria

October 7, 2011

First Posted (Estimate)

October 10, 2011

Study Record Updates

Last Update Posted (Estimate)

February 22, 2013

Last Update Submitted That Met QC Criteria

February 21, 2013

Last Verified

February 1, 2013

More Information

Terms related to this study

Additional Relevant MeSH Terms

Other Study ID Numbers

  • Si050/2554(EC2)

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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