TOWNLEY TOTAL ELBOW SYSTEM
Device Facts
| Record ID | K955916 |
|---|---|
| Device Name | TOWNLEY TOTAL ELBOW SYSTEM |
| Applicant | Biologically Oriented Prostheses |
| Product Code | JDC · Orthopedic |
| Decision Date | Aug 8, 1996 |
| Decision | SESE |
| Submission Type | Traditional |
| Regulation | 21 CFR 888.3150 |
| Device Class | Class 2 |
| Attributes | Therapeutic |
Intended Use
The Townley Elbow System contains three components which are intended for single use. Cement fixation of the components is required.
Device Story
Total elbow prosthesis for joint replacement. System comprises humeral component, ulnar tray, and UHMWPE ulnar insert. Humeral component features Cobalt Chrome construction with 5-degree valgus-angled intramedullary stem; articulating surface contoured for snap-fit with ulnar insert. Ulnar tray provides support for insert and fixation stem. Components implanted via cement fixation. Device restores flexion/extension motion while allowing limited varus/valgus excursion and resisting dislocation. Used by orthopedic surgeons in clinical settings to treat severe elbow pain and joint dysfunction.
Clinical Evidence
No clinical data provided; substantial equivalence based on design and material comparison to predicate.
Technological Characteristics
Materials: Cobalt Chrome (ASTM F-799) for humeral component and ulnar tray; UHMWPE for ulnar insert. Design: Modular, snap-fit articulation, right/left universal ulnar components. Fixation: Cement required. Form factor: Three humeral sizes (35mm, 40mm, 45mm); two ulnar sizes (small, large).
Indications for Use
Indicated for patients with osteoarthritis or rheumatoid arthritis presenting with severe elbow pain and limited joint motion. Contraindicated in patients with excessive bone loss, septic arthritis, periarticular osteomyelitis, or general health problems.
Regulatory Classification
Identification
An elbow joint metal/polymer constrained cemented prosthesis is a device intended to be implanted to replace an elbow joint. It is made of alloys, such as cobalt-chromium-molybdenum, or of these alloys and of an ultra-high molecular weight polyethylene bushing. The device prevents dislocation in more than one anatomic plane and consists of two components that are linked together. This generic type of device is limited to those prostheses intended for use with bone cement (§ 888.3027).
Special Controls
*Classification.* Class II. The special controls for this device are:(1) FDA's: (i) “Use of International Standard ISO 10993 ‘Biological Evaluation of Medical Devices—Part I: Evaluation and Testing,’ ” (ii) “510(k) Sterility Review Guidance of 2/12/90 (K90-1),” (iii) “Guidance Document for Testing Orthopedic Implants with Modified Metallic Surfaces Apposing Bone or Bone Cement,” (iv) “Guidance Document for the Preparation of Premarket Notification (510(k)) Application for Orthopedic Devices,” (v) “Guidance Document for Testing Non-articulating, ‘Mechanically Locked’ Modular Implant Components,” (2) International Organization for Standardization's (ISO): (i) ISO 5832-3:1996 “Implants for Surgery—Metallic Materials—Part 3: Wrought Titanium 6-Aluminum 4-Vandium Alloy,” (ii) ISO 5832-4:1996 “Implants for Surgery—Metallic Materials—Part 4: Cobalt-Chromium-Molybdenum Casting Alloy,” (iii) ISO 5832-12:1996 “Implants for Surgery—Metallic Materials—Part 12: Wrought Cobalt-Chromium-Molybdenum Alloy,” (iv) ISO 5833:1992 “Implants for Surgery—Acrylic Resin Cements,” (v) ISO 5834-2:1998 “Implants for Surgery—Ultra High Molecular Weight Polyethylene—Part 2: Moulded Forms,” (vi) ISO 6018:1987 “Orthopaedic Implants—General Requirements for Marking, Packaging, and Labeling,” (vii) ISO 9001:1994 “Quality Systems—Model for Quality Assurance in Design/Development, Production, Installation, and Servicing,” and (viii) ISO 14630:1997 “Non-active Surgical Implants—General Requirements,” (3) American Society for Testing and Materials': (i) F 75-92 “Specification for Cast Cobalt-28 Chromium-6 Molybdenum Alloy for Surgical Implant Material,” (ii) F 648-98 “Specification for Ultra-High-Molecular-Weight Polyethylene Powder and Fabricated Form for Surgical Implants,” (iii) F 799-96 “Specification for Cobalt-28 Chromium-6 Molybdenum Alloy Forgings for Surgical Implants,” (iv) F 981-93 “Practice for Assessment of Compatibility of Biomaterials (Nonporous) for Surgical Implant with Respect to Effect of Material on Muscle and Bone,” (v) F 1044-95 “Test Method for Shear Testing of Porous Metal Coatings,” (vi) F 1108-97 “Specification for Titanium-6 Aluminum-4 Vanadium Alloy Castings for Surgical Implants,” (vii) F 1147-95 “Test Method for Tension Testing of Porous Metal Coatings, ” and (viii) F 1537-94 “Specification for Wrought Cobalt-28 Chromium-6 Molybdenum Alloy for Surgical Implants.”
Predicate Devices
- Capitello-Condylar Total Elbow (Johnson & Johnson)
Related Devices
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- K972691 — ABC TOTAL ELBOW PROTHESIS · Biomet, Inc. · Oct 15, 1997
- K960087 — SORIBIE RESURFACING TOTAL ELBOW SYSTEM (PROPOSED NAME) · Wrightmedicaltechnologyinc · Sep 20, 1996
- K983141 — CAPITELLO-CONDYLAR TOTAL ELBOW PROSTHESIS · Johnson & Johnson Professionals, Inc. · Nov 6, 1998
