Matched Pair Study - Kinematic Vs Mechanical Alignment

NCT ID: NCT03446391

Last Updated: 2024-12-16

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

Total Enrollment

50 participants

Study Classification

OBSERVATIONAL

Study Start Date

2018-01-02

Study Completion Date

2019-05-18

Brief Summary

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The aim of this study is to evaluate postoperative knee function after total knee arthroplasty performed according to the anatomical alignment and compare these results to those of a matched historical cohort of patients operated with mechanical alignment.

Detailed Description

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The 25 patients, of the Kinematic group, are prospectively enrolled. While, the data of patients of the Mechanical group, are retrospectively collected from an historical collection.

Conditions

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Osteoarthritis, Knee Joint Disease

Study Design

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Observational Model Type

CASE_CONTROL

Study Time Perspective

OTHER

Study Groups

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Kinematic alignment with GMK Sphere®

Patients enrolled prospectively with surgeries planned to get kinematic alignment

Kinematic alignment

Intervention Type PROCEDURE

The principle for kinematically aligning the femoral component is to remove the correct amount of bone and cartilage from the distal and posterior femur after accounting for wear and saw blade kerf, so that the total thickness of the missing and removed tissue matches the thickness of the femoral component.

GMK Sphere®

Intervention Type DEVICE

The GMK Sphere® is a total knee prosthesis . The design of the GMK Sphere® is characterized by a spherical medial femoral condyle and an asymmetrical fixed tibial UHMWPE polyethylene insert with a concave spherical medial compartment.

Mechanical alignment with GMK Sphere®

Historical group who had mechanical alignment, match-paired with the prospective group

Mechanical alignment

Intervention Type PROCEDURE

Classic mechanical alignment (MA) in total knee arthroplasty (TKA) is meant to co-align the prosthetic components to the mechanical axes of the femur and tibia and restore neutral overall limb alignment

GMK Sphere®

Intervention Type DEVICE

The GMK Sphere® is a total knee prosthesis . The design of the GMK Sphere® is characterized by a spherical medial femoral condyle and an asymmetrical fixed tibial UHMWPE polyethylene insert with a concave spherical medial compartment.

Interventions

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Kinematic alignment

The principle for kinematically aligning the femoral component is to remove the correct amount of bone and cartilage from the distal and posterior femur after accounting for wear and saw blade kerf, so that the total thickness of the missing and removed tissue matches the thickness of the femoral component.

Intervention Type PROCEDURE

Mechanical alignment

Classic mechanical alignment (MA) in total knee arthroplasty (TKA) is meant to co-align the prosthetic components to the mechanical axes of the femur and tibia and restore neutral overall limb alignment

Intervention Type PROCEDURE

GMK Sphere®

The GMK Sphere® is a total knee prosthesis . The design of the GMK Sphere® is characterized by a spherical medial femoral condyle and an asymmetrical fixed tibial UHMWPE polyethylene insert with a concave spherical medial compartment.

Intervention Type DEVICE

Eligibility Criteria

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Inclusion Criteria

1. Patients presenting with disease that meets the indications for use for Medacta implants defined by this study (on-label use).
2. Patients necessitating primary Total Knee Replacement
3. Patients who are willing and able to provide written informed consent for participation in the study. Written informed consent must be obtained prior to the patient's surgery.

Exclusion Criteria

1. Those with one or more medical conditions identified as a contraindication defined by the labeling on Medacta implants used in this study.
2. Previous osteotomy around the knee
3. Ligament instability likely to require higher level of constraint
4. Previous infection or inflammatory disease
5. Extraarticular deformities for which a femoral intramedullary guide rod can't be inserted into the canal and use of Computer Assisted Orthopaedic Surgery (CAOS) or Patient Specific Instrumentation (PSI) is required.
Eligible Sex

ALL

Accepts Healthy Volunteers

No

Sponsors

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Medacta International SA

INDUSTRY

Sponsor Role lead

Responsible Party

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Responsibility Role SPONSOR

Locations

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St. Vinzenz Krankenhaus Brakel

Brakel, North Rhine-Westphalia, Germany

Site Status

Countries

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Germany

Other Identifiers

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P02.010.18

Identifier Type: -

Identifier Source: org_study_id