Cement-Free Hip Replacement System

A new acetabular hip replacement system is intended to relieve pain and increase functionality in the hip without the use of cement.

In theory, cement-free joint replacements are expected to reduce the chance of infection and loosening of the prosthesis, which are the two major complications of hip replacement surgery. The Surpass acetabular system, developed by Stelkast (McMurray, PA, USA), is a ceramic-on-ceramic artificial hip replacement system designed for use in primary total hip arthroplasty due to noninflammatory degenerative joint diseases such as osteoarthritis, avascular necrosis, congenital hip dysplasia, and traumatic arthritis. The system has been cleared by the U.S. Food and Drug Administration (FDA).

The prosthetic device consists of a metal hip stem that is placed into a hole drilled in the end of the thigh bone, a femoral head that attaches to the top of the hip stem, a ceramic insert that the femoral head fits into, and an acetabular shell that is implanted into the pelvis. The metal hip stem and acetabular shell are intended for cement-free use and are held in place by a press-fit into the surrounding bone. Porous surface coatings on some metal components aid in long-term fixation by allowing tissue ingrowth.

Use of the device is contraindicated in patients with insufficient quantity or quality of bone to allow its proper insertion and fixation, insufficient soft-tissue integrity to provide adequate stability, muscle laxity or inadequate soft tissue for proper function and healing, neuromuscular disorders that do not allow control of the affected joint, active joint infections, or chronic systemic infections, obesity, and skeletal immaturity.



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