Evaluation of Triathlon - A New Total Knee Prosthesis System - RSA Triathlon Standard vs. Short Keel (TriathlonRSA)

Region Skane

Status: Completed

Conditions: Arthroplasty, Replacement, Knee

Treatments: Device: Triathlon Short Keel; Device: Triathlon Standard Keel

Study type: Interventional

Funder types: Other

Identifiers

NCT02525614

K-S-015 Triathlon RSA _4

Details and patient eligibility

About

The objective is to investigate the Clinical, Radiographic, Roentgen Stereophotogrammetric behaviour and patient outcome when using the Triathlon total knee prosthesis in a prospective randomized clinical trial.

Full description

The objective is to investigate the Clinical, Radiographic, Roentgen Stereophotogrammetric behaviour and patient outcome when using the Triathlon total knee prosthesis in a prospective randomized clinical trial.

The evaluation is carried out by a prospective randomised RSA-study with Triathlon Standard vs. Short Keel.

Enrollment: 59 patients

Sex: All

Ages: 18 to 85 years old

Volunteers: No Healthy Volunteers

Inclusion criteria

1. Patients suffering exclusively from OA, Stage II-V [Ahlbäck-Traumascore, 1968 391] will be operated.
2. Patients requiring knee prosthesis, suitable for the use of Duracon and Triathlon knee system
3. Patients who understand the conditions of the study and are willing and able to comply with the post-operative scheduled clinical and radiographical evaluations and the prescribed rehabilitation.
4. Patients who signed the Ethics Committee approved Informed Consent Form prior to surgery.

Exclusion criteria

1. Previous major knee surgery
2. Other significant disabling problems from the muscular-skeletal system than in the knees
3. Obese patients where obesity is severe enough to affect subject's ability to perform activities of daily living (body mass index, kg/m2: BMI above 35).
4. Patients with active or suspected infection.
5. Patients with malignancy - active malignancy.
6. Patients with severe osteoporosis, Paget's disease, renal osteodystrophy.
7. Patients immunologically suppressed, or receiving steroids in excess of physiologic dose requirements.
8. The patient has a neuromuscular or neurosensory deficit which would limit the ability to assess the performance of the device or the patient has a neurological deficit which interferes with the patient's ability to limit weight bearing or places an extreme load on the implant during the healing period.
9. Female patients planning a pregnancy during the course of the study.
10. Patients with systemic or metabolic disorders leading to progressive bone deterioration.
11. Patients, who as judged by the surgeon, are mentally incompetent or are unlikely to be compliant with the prescribed post-operative routine and follow-up evaluation schedule.
12. Patients with other severe concurrent joint involvements, which can affect their outcome.
13. Patients with other concurrent illnesses, which are likely to affect their outcome such as sickle cell anaemia, systemic lupus erythematosus or renal disease requiring dialysis.
14. Patients under the protection of law (e.g. guardianship).

Trial design

Primary purpose: Treatment

Allocation: Randomized

Interventional model: Parallel Assignment

Masking: Double Blind

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59 participants in 2 patient groups

Triathlon Standard Keel

Active Comparator group

Description:

Triathlon Cruciate Retaining knee (CR) with a tibial keel of standard length randomised against Triathlon Cruciate Retaining knee (CR) with a tibial part with a short keel, both system will be used with cemented fixation. The short tibial keel is thought to facilitate the surgery due to easier access and better positioning possibilities. This study is aimed to evaluate if the short tibial keel will have equal fixation and migration properties as the standard keel.

Treatment:

Device: Triathlon Standard Keel

Triathlon Short Keel

Active Comparator group

Description:

Triathlon Cruciate Retaining knee (CR) with a tibial keel of standard length randomised against Triathlon Cruciate Retaining knee (CR) with a tibial part with a short keel, both system will be used with cemented fixation. The short tibial keel is thought to facilitate the surgery due to easier access and better positioning possibilities. This study is aimed to evaluate if the short tibial keel will have equal fixation and migration properties as the standard keel.

Treatment:

Device: Triathlon Short Keel