Zimmer POLAR - Total Knee Arthroplasty (TKA)

Not Applicable

Completed

Conditions: Osteoarthritis
RheumatoId Arthritis
Traumatic Arthritis
Polyarthritis

Brief Summary: The primary objective of this study is to obtain implant survivorship and clinical outcomes data for commercially available Persona fixed bearing knee implants used in total knee arthroplasty. The assessment will include implant survivorship and clinical performance measured by pain and function, quality of life data, radiographic parameters and survivorship.

Detailed Description: The study design is a prospective, multicenter, study of the commercially available Persona fixed bearing knee implants. The study will require each site to obtain Institutional Review Board (IRB) approval prior to study enrollment. All potential study subjects will be required to participate in the Informed Consent Process.

All study subjects will undergo preoperative clinical evaluations prior to their total knee arthroplasty. The post-operative clinical and radiographic evaluations will be conducted at 6 weeks, 6 months, 1 year, 2, 3, 4, and 5 years.

All info specified in the Brief Summary will be captured via the Knee Society Score, EQ-5D, Forgotten Joint Score, KSS Patient Expectations, Physical Exam, and Physician's Assessment of Radiographic Outcomes form.

Recruitment & Eligibility

Inclusion Criteria

Patient 18-75 years of age, inclusive;
Patient qualifies for primary total knee arthroplasty based on physical exam and medical history, including diagnosis of severe knee pain and disability due to at least one of the following:
- rheumatoid arthritis, osteoarthritis, traumatic arthritis, polyarthritis;
- collagen disorders and/or avascular necrosis of the femoral condyle;
- post-traumatic loss of joint configuration, particularly when there is patellofemoral erosion, dysfunction or prior patellectomy;
- moderate valgus, varus, or flexion deformities;
- the salvage of previously failed surgical attempts that did not include partial or total knee arthroplasty of the ipsilateral knee;
Patient has participated in a study-related Informed Consent process;
Patient is willing and able to complete scheduled study procedures and follow-up evaluations;
Independent of study participation, patient is a candidate for commercially available Persona fixed bearing knee components implanted in accordance with product labeling.

Exclusion Criteria

Patient is currently participating in any other surgical intervention studies or pain management studies;
Previous history of infection in the affected joint and/or other local/systemic infection that may affect the prosthetic joint;
Insufficient bone stock on femoral or tibial surfaces;
Skeletal immaturity;
Neuropathic arthropathy;
Osteoporosis or any loss of musculature or neuromuscular disease that compromises the affected limb;
Stable, painless arthrodesis in a satisfactory functional position;
Severe instability secondary to the absence of collateral ligament integrity;
Rheumatoid arthritis accompanied by an ulcer of the skin or a history of recurrent breakdown of the skin;
Patient has a known or suspected sensitivity or allergy to one or more of the implant materials;
Patient is pregnant or considered a member of a protected population (e.g., prisoner, mentally incompetent, etc.);
Patient has previously received partial or total knee arthroplasty for the ipsilateral knee.

Arm && Interventions

Group	Intervention	Description
Persona TKA	Zimmer Persona Total Knee System	Primary total knee arthroplasty subjects that receive the Zimmer Persona Total Knee System

Primary Outcome Measures

Name	Time	Method
Knee Society Scores	5 years post op	This form includes alignment, instability, joint range of motion, and symptoms. The overall range of scores available is -8 to 106. A higher score indicates good alignment, range of motion, and minimal symptoms of pain. A lower score indicates poor knee alignment, potential issues in range of motion, and the likely experience of symptoms of pain.

Secondary Outcome Measures

Name	Time	Method
Forgotten Joint Score (FJS)	5 years post-op	The Forgotten Joint Score-12 (FJS-12) is a validated patient-reported outcome measure (PROM) tool designed to assess artificial prosthesis awareness during daily activities following total knee arthroplasty (TKA). Scores range from 0-100. A score of 100 would indicate a high degree of "forgetting" the artificial joint (a low degree of awareness). A score of 0 would indicates a very low degree of "forgetting" the artificial joint (typically aware of the replacement).
EQ-5D	5 years post op	The EQ-5D family of instruments has been developed to evaluate health across a wide range of disease areas. Each EQ-5D instrument comprises a short descriptive system questionnaire and a visual analogue scale (EQ VAS). The questionnaire provides a simple descriptive profile of a respondent's health state. The EQ VAS provides an alternative way to elicit an individual's rating of the individual's own overall current health. The overall range is -0.1 to 1.0. A higher score indicates a better overall health rating reported by the patient, and a lower score indicates a poor overall health rating. It is possible to score a negative value. Although unlikely, a negative value is observed to be a state worse than death.

Locations (3): Duke University
🇺🇸
Durham, North Carolina, United States
Midwest Orthopaedics at Rush
🇺🇸
Naperville, Illinois, United States
The Rothman Institute
🇺🇸
Philadelphia, Pennsylvania, United States