HemiCAP™ Knee

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The Arthrosurface HemiCAP™ system is a surgical method for the treatment of localized cartilage lesions and defects in the major joints. This system is comprised of three elements; a three-dimensional mapping technology, a set of instruments to map and prepare the damaged area and a cobalt-chrome and titanium implant. The CAP™ system precisely aligns the surface of the implant to the contours of the patient's articular cartilage surface, thus filling the defect and restoring a smooth and continuous articular surface. The CAP™ system has been developed so that it can be utilized via minimal access surgical techniques.

The HemiCAP™ Instrument Set enables the surgeon to accurately place the implant and precisely map the curves of the articular surface, in real-time, under direct or arthroscopic visualization, with no angle-induced errors or magnification errors that might exist with MRI, or X-ray imaging techniques.

The HemiCAP™ system is intended to provide an effective interim means for managing pain and disability in the middle-aged patient until a total joint replacement treatment option becomes more necessary, and is part of a clinical treatment strategy to help avoid early-age-revision scenarios. The prosthetic may also provide a treatment option for the older patient who may not tolerate the morbidity of a total joint replacement procedure.

The HemiCAP™ implants and instruments are designed to remove a minimal amount of bone stock, preserve functional structures and tissues, and allow for an uncomplicated removal in the event of revision.

Current treatments of the knee vs. HemiCAP™

HemiCAP™ Resurfacing System

Introduction
The Arthrosurface HemiCAP™ (Contoured Articular Prosthetic) Resurfacing System is a surgical method for the treatment of localized lesions and defects in the major joints. This system is comprised of three elements; a mapping technique, a set of instruments to prepare the damaged area and place the resurfacing prosthesis, and the HemiCAP™ implant. The CAP™ system precisely aligns the surface of the implant to the contours of the patient's articular cartilage surface, thus filling the defect and restoring a smooth and continuous articular surface. The CAP™ system has been developed so that it can be utilized via minimal access surgical techniques.

One component of the HemiCAP™ system is a set of reusable instruments that are used to map and prepare the defect sites for receipt of the implant. The HemiCAP™ implants come in a variety of sizes and curvature profiles designed for the different surface anatomies. Arthrosurface continues to design products and development marketing strategies to address other painful joints of the body.

Description
The HemiCAP™ implant is a rounded, cap-like implant made from a cobalt chrome alloy with a central post on the implanted, or bone side. Cobalt chrome is a material that has been used in total joint reconstruction devices for over two decades. This material has proven to provide a safe, effective and strong weight-bearing surface in joints. This metal alloy exhibits lubricious qualities very similar to articular cartilage when implanted in a joint. The fixation component that looks like a screw is made of Titanium, another material that has been used in Orthopedics for decades.

The HemiCAP™ surgical procedure begins the same way as all arthroscopic procedures. Two or more small access incisions are made in order to access the joint. One of the access holes is used to insert the arthroscope which is like a small telescope. This is inserted into a cannula or tube which is used to protect the arthroscope and also allow for a saline fluid to flow into the joint. The second hole or portal is used to introduce different instruments during the operation. When an articular defect is confirmed, the central axis in the middle of the defect is located and a component that looks like a screw is implanted to establish the mechanism for anchoring the resurfacing implant. Using this first component as a central axis, several specially designed instruments are introduced to map the contours of the patient's articular cartilage surrounding the defect and to prepare the tissue in and around the defect itself for the resurfacing implant. Once the site is prepared, the HemiCAP™ resurfacing implant is brought into position and seated.

For more information on the Arthrosurface HemiCAP concept such as brochures, articles, video etc., please contact Ortotech directly.