AVL HINGE KNEE SYSTEM
Device Facts
| Record ID | K051570 |
|---|---|
| Device Name | AVL HINGE KNEE SYSTEM |
| Applicant | Biomet, Inc. |
| Product Code | KRO · Orthopedic |
| Decision Date | Aug 5, 2005 |
| Decision | SESE |
| Submission Type | Traditional |
| Regulation | 21 CFR 888.3510 |
| Device Class | Class 2 |
| Attributes | Therapeutic |
Indications for Use
The indications for use of the AVL Hinge Knee System are: Painful and disabled joint resulting from avascular necrosis, osteoarthritis, rheumatoid arthritis or traumatic arthritis Correction of varus, valgus or post traumatic deformity Correction of revision of unsuccessful osteotomy, arthrodesis, or previous joint replacement Ligament deficiencies Tumor resections Treatment of non-unions, femoral neck and trochanteric fracture of the proximal femur with head involvement, unmanageable using other techniques Revision of previously failed total joint arthroplasty Trauma These devices are for cemented use only.
Device Story
The AVL Hinge Knee System is a constrained knee prosthesis consisting of a modular femoral component and a modular tibial component connected by a yoke and axle mechanism. A polyethylene bearing is positioned between the femoral and tibial components to facilitate articulation. The device is intended for surgical implantation by a physician to replace a diseased or damaged knee joint. It functions as a mechanical replacement to restore joint function and stability in patients with severe joint pathology or trauma. The system is designed for cemented fixation.
Clinical Evidence
No clinical data provided.
Technological Characteristics
Constrained knee prosthesis; metal/polymer construction; modular femoral and tibial components; yoke and axle hinge mechanism; polyethylene bearing; cemented fixation.
Indications for Use
Indicated for patients with painful/disabled joints due to avascular necrosis, osteoarthritis, rheumatoid arthritis, or traumatic arthritis; varus, valgus, or post-traumatic deformity; failed osteotomy, arthrodesis, or previous joint replacement; ligament deficiencies; tumor resections; non-unions; femoral neck/trochanteric fractures; or failed total joint arthroplasty. For cemented use only.
Regulatory Classification
Identification
A knee joint femorotibial metal/polymer constrained cemented prosthesis is a device intended to be implanted to replace part of a knee joint. The device limits translation or rotation in one or more planes and has components that are linked together or affined. This generic type of device includes prostheses composed of a ball-and-socket joint located between a stemmed femoral and a stemmed tibial component and a runner and track joint between each pair of femoral and tibial condyles. The ball-and-socket joint is composed of a ball at the head of a column rising from the stemmed tibial component. The ball, the column, the tibial plateau, and the stem for fixation of the tibial component are made of an alloy, such as cobalt-chromium-molybdenum. The ball of the tibial component is held within the socket of the femoral component by the femoral component's flat outer surface. The flat outer surface of the tibial component abuts both a reciprocal flat surface within the cavity of the femoral component and flanges on the femoral component designed to prevent distal displacement. The stem of the femoral component is made of an alloy, such as cobalt-chromium-molybdenum, but the socket of the component is made of ultra-high molecular weight polyethylene. The femoral component has metallic runners which align with the ultra-high molecular weight polyethylene tracks that press-fit into the metallic tibial component. The generic class also includes devices whose upper and lower components are linked with a solid bolt passing through a journal bearing of greater radius, permitting some rotation in the transverse plane, a minimal arc of abduction/adduction. This generic type of device is limited to those prostheses intended for use with bone cement (§ 888.3027).
Predicate Devices
- AVL Hinge Knee System (K010774)
- Orthopedic Salvage System (OSS™) (K002757)
- Finn® Knee System (K945028)