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The Proven Gen-Flex™ Total Knee System is intended for: - Total knee replacement due to osteoarthritis. osteonecrosis, rheumatoid arthritis, and/or post-traumatic degenerative problems. - Revision of failed previous reconstructions where sufficient bone stock and soft tissue integrity are present. The device is intended for cemented use only.

The EXp Tibial Inserts and Patellar Components are made of polyethylene to which Vitamin E has been blended. The tibial inserts are available in "Cruciate Retaining" (CR) and "Posterior Stabilized" (PS) designs. The patellar components are available Single Peg and Three Peg designs. These implants are part of the Proven Gen-Flex™ Total Knee System and will be used in conjunction with a femoral component and tibial baseplate in total knee arthroplasty.

The Cross-Over Acetabular Shell and Liner are intended for use in reconstruction of the articulating surface of the acetabular portion of the hip that is severely disabled and/or very painful resulting from: 1. Non-inflammatory degenerative joint disease including osteoarthritis and avascular necrosis. 2. Rheumatoid arthritis. 3. Correction of functional deformity. 4. Treatment of non-union, femoral neck fracture, and trochanteric fractures of the proximal femur with head involvement, unmanageable using other techniques. 5. Revision of previously failed total hip Arthroplasty. The Cross-Over Acetabular Shell and Liner are used as part of the Provident Hip Systems. The components of this hip system are intended for cementless fixation.

The Cross-Over Acetabular Shell and Liner will be used as part of a complete total hip system in conjunction with a femoral head and femoral stem in total hip arthroplasty. The Cross-Over Acetabular Shell is made of titanium alloy with a commercially pure titanium plasma spray coating. The Cross-Over Liner is made of polyethylene blended with Vitamin E. The liner is available in both non-hooded and hooded options.

The EXp Acetabular Shell Liner is intended for use in reconstruction of the articulating surface of the acetabular portion of the hip that is severely disabled and/or very painful resulting from: 1. Non-inflammatory degenerative joint disease including osteoarthritis and avascular necrosis. 2. Rheumatoid arthritis. 3. Correction of functional deformity. 4. Treatment of non-union, femoral neck fracture, and trochanteric fractures of the proximal femur with head involvement, unmanageable using other techniques. 5. Revision of previously failed total hip Arthroplasty. Cemented and Uncemented Applications

The EXp Acetabular Shell Liner is made of polyethylene to which Vitamin E has been added. It is available in both hooded and non-hooded options. The liner is part of a complete total hip system and will be used in conjunction with an acetabular shell, femoral head and femoral stem in total hip arthroplasty. The femoral heads which are to be mated with the EXp Liner are made of Biolox forte, Biolox Delta, or CoCr alloy.

The StelKast Proven Stem Extenders are intended for use with compatible components of the Proven Knee System for the following indications: 1. Total knee replacement due to osteoarthritis, osteonecrosis, rheumatoid arthritis and/or post-traumatic degenerative problems; 2. Revision of failed previous reconstructions where sufficient bone stock and soft integrity are present; and 3. Cemented use only.

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- 1. Total knee replacement due to osteoarthritis, osteonecrosis, rheumatoid arthritis, and/or post-traumatic degenerative problems. - 2. Revision of failed previous reconstructions where sufficient bone stock and soft tissue integrity are present. - 3. For cemented use only.

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The StelKast Proven Revision Modular Tibial Tray is intended for cemented use only in total knee replacement with the following indications: 1. osteoarthritis, osteonecrosis, rheumatoid arthritis and/or post-traumatic degenerative problems; 2. revision of failed previous reconstructions where sufficient bone stock and soft integrity are present.

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The 32mm Modular Ceramic Femoral Head is a single use device used for reconstruction of the articulating surface of the femoral head portion of the hip that is severely disabled and/or very painful resulting from osteoarthritis, rheumatoid arthritis, traumatic arthritis, avascular necrosis, or fracture of the femoral head.

StelKast 32mm Modular Ceramic Femoral Head

- 1. Moderate joint impairment from painful arthritis (rheumatoid, osteo and/or posttraumatic). - 2. Revision of a failed unicompartmental knee implant or other procedure. - 3. Alternative to tibial osteotomy in patients with unicompartmental arthritis.

StelKast Unicondylar Knee System

1. Total knee replacement due to osteoarthritis, osteonecrosis, rheumatoid arthritis and/or post-traumatic degenerative problems. 2. Revision of failed previous reconstructions where sufficient bone stock and soft tissue integrity are present. 3. For cemented use only.

Stelkast Proven Cemented, Semi-Constrained Total Knee System

1. The ProClass Press Fit Hip Stem is a single use, cementless device used for reconstruction of the articulating surface of the femur portion of the hip that is severely disabled and/or very painful resulting from osteoarthritis, rheumatoid arthritis, traumatic arthritis, avascular necrosis, or fracture of the femoral head provided there is sufficient sound bone to seat the prosthesis. 2. The stem can be used for primary hip implant or for hip revision of a failed implant. 3. The stem can be used for congenital defects that will allow adequate function of the system.

ProClass Press Fit Hip Stem is a single use, cementless device.