Signature Versus Computer Assisted Surgery Study

Study Overview
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Brief Summary
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The purpose of the data collection is to document the performance and clinical outcomes of the Vanguard Knee using Signature Custom Cutting Guides and Computer Assisted Surgery.

Detailed Description
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The purpose of this prospective clinical data-collection is to document the performance and clinical outcomes of the Vanguard® Knee System using Signature™ Custom Guides and Computer Assisted Surgery. FDA has cleared the Vanguard Knee via premarket notification 510(k) K023546, K033489, and K050222. FDA has cleared the software for the Signature™ Custom Guides via premarket notification 510(k) K073449. The data gathered will be collated and used to provide feedback to design engineers, support marketing efforts, answer potential questions from reimbursement agencies, and will serve as a part of Biomet's Post Market Surveillance System. Function will be assessed through the Knee Society Score. Survivorship will be documented by asking the surgeon to document revisions and complications.

Official Title
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A Comparison of Signature Custom Cutting Guides and Computer Assisted Surgery Techniques With the Vanguard Knee System

Conditions
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Joint Disease

Intervention / Treatment
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* Device: Total Knee Replacement with Vanguard Total Knee


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Inclusion criteria are identical to the indications for use stated in the FDA cleared labeling for the device (510(k) K023546, K033489, and K050222). These indications are stated below: Painful and disabled knee joint resulting from osteoarthritis, rheumatoid arthritis, traumatic arthritis where one or more compartments are involved. Correction of varus, valgus, or posttraumatic deformity. Correction or revision of unsuccessful osteotomy, arthrodesis, or failure of previous joint replacement procedure. The Regenerex™ femoral augments are indicated for use with the Vanguard® Total Knee System. The Regenerex™ tibial augments are indicated for use with standard and offset Biomet® Tibial Trays. Patient selection factors to be considered include: Need to obtain pain relief and improve function Ability and willingness of the patient to follow instructions, including control of weight and activity level A good nutritional state of the patient, and The patient must have reached full skeletal maturity Femoral components and tibial tray components with porous coatings are indicated for cemented and uncemented biological fixation application. Non-coated (Interlok™) devices and all polyethylene patellar components are indicated for cemented application only. Exclusion Criteria: Exclusion criteria are identical to the contraindications stated in the FDA cleared labeling for the device 510(k) K023546, K033489, and K050222. These contraindications are stated below: Absolute contraindications include: infection, sepsis, and osteomyelitis Relative contraindications include: Uncooperative patient or patient with neurologic disorders who is incapable of following directions Osteoporosis Metabolic disorders which may impair bone formation, Osteomalacia Distant foci of infections which may spread to the implant site Rapid joint destruction, marked bone loss or bone resorption apparent on roentgenogram Vascular insufficiency, muscular atrophy, neuromuscular disease Incomplete or deficient soft tissue surrounding the knee. Biomet® Microplasty™ Tibial Trays are contraindicated for use with constrained bearings.

Ages Eligible for Study
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Minimum Age: 18 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Treatment
Allocation: Non-Randomized
Intervention Model: Parallel Assignment
Masking: None (Open Label)


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Other: Signature Custom Cutting Guides<br>Patients receiving a Vanguard Total Knee implanted utilizing non implantable Signature Cutting Guides Surgical Technique. | Device: Total Knee Replacement with Vanguard Total Knee<br>* Patients indicated for a total knee replacement utilizing the Vanguard Total Knee System.<br>|
| Other: CAS (Computer Assisted Surgery)<br>Patients receiving a Vanguard Total Knee implanted utilizing non implantable Computer Assisted Surgery Technique. | Device: Total Knee Replacement with Vanguard Total Knee<br>* Patients indicated for a total knee replacement utilizing the Vanguard Total Knee System.<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Mechanical Alignment | Angle between femoral head, center of knee, and talus. | Data Collected at 0-10 Weeks; but Analyzed at Completion of Study | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Knee Society Objective Score | Objective Scoring of Knee Society score is the clinical assessment which includes the sum of range of motion, stability, flexion contracture, extension lag, and alignment scores. | Completion of Study | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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Arthritis, Osteoarthritis, Arthroplasty