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HemiCAP Resurfacing System

What is a HemiCAP and is it right for me?

If you are a middle aged person age 40-70 and have pain in your joints then that is a good starting point for this discussion. As we get older, the pain in our joints becomes more of a nuisance and requires some attention. You may have tried simple things such as physical therapy and injections into your joints but they just aren't working anymore. You may have even tried a surgical procedure such as an arthroscopy or a microfracture procedure but the pain and ache has returned especially after basic activity such as sports or chasing the kids around. It may be time to investigate a more durable procedure such as the HemiCAP from Arthrosurface.

An easy way to describe the HemiCAP implant is to correlate it to a dental procedure. When you have a cavity in your tooth, the dentist places a small filling into the cavity. Your joint cartilage can develop small "cavities" or potholes that need to be addressed as they can cause pain. An orthopaedic surgeon, who is trained on the Arthrosurface system, can perform a minimally invasive surgery that will place a small implant into the defect into that "cavity" or defect which can alleviate your pain and make your cartilage into a smooth surface once again.


The Arthrosurface HemiCAP resurfacing system is a comprehensive surgical solution for the treatment of articular cartilage lesions and defects in the body's weight bearing, non-weight bearing and extremity joints. The system is similar to a dentist that uses a filling to cap a cavity in the tooth. The system has 3 elements:

A family of "patient matching" cobalt chrome CAP implants;

A central fixation component; and

An instrument set used to map the joint surface, prepare the joint/bone and implant the prosthesis.

The HemiCAP system precisely aligns the surface of the implant to the contours of the patient's articular surface, filling the defect and restoring a smooth and continuous joint surface. The implants are designed to match the surface and contours being restored. The instruments and techniques apply to any joint surface, spherical, aspherical, convex, concave or convex-concave.

The procedure is designed to get patients back to work and life with minimal disruption. Surgery is typically performed in an outpatient center and the procedure takes less than one hour.

HemiCAP System Advantages

- for the Patient

HemiCAP technology was designed for patients who live longer, continue working, and retain more active lifestyles, and have an increased need for joint preserving treatments

A treatment option that "bridges the gap" between microfracture/injections and total joint replacement

Clinical studies demonstrate positive clinical outcomes across different joints with over 30,000 HemiCAPs implanted globally

Patients report outstanding pain relief, rapid recovery times and significant range of motion improvements in multi-center studies

Procedure may be performed on outpatient basis

HemiCAP allows for preservation of the joint and surrounding bone and maintains existing joint biomechanics, thereby allowing normal motion

Surgical Technique

The HemiCAP implants are comprised of two parts: an articular cap and a fixation component. The articular component is a rounded, cap-like implant made from a cobalt chrome (CoCr) alloy with a central post on its underside. Cobalt chrome is a material that has been used in total joint reconstruction devices for 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 looks like a screw and is made of Titanium (Ti), another material that has been used in orthopaedics for decades. The two components are connected together via a morse taper which is a very secure method of fixation.

The HemiCAP surgical procedure begins when an articular defect is confirmed. The diameter of the defect is determined and a guide wire is introduced into the middle of the defect. The fixation component is implanted to establish the mechanism for anchoring the articular component . Using the fixation component as a central axis, specially designed instruments are used to map the contours of the patient's articular cartilage surrounding the defect and to prepare the tissue in and around the defect for the resurfacing implant. Once the site is prepared, the HemiCAP resurfacing implant is brought into position and seated.