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96° CONGRESS OF THE PIEDMONTESE-LIGURIAN-LOMBARD SOCIETY OF ORTHOPEDICS AND TRAUMATOLOGY (SPLLOT) (Brescia, September 24-25, 1999)
BIOMATERIALS IN ORTOPEDICS: EXPECTATION AND CLINICAL PRACTICE
Croce A., Mazza E., Volontè L., Delle Rose G.
Purpose. This paper describes a personal experience in the use of hydroxyapatite-coated press-fit total hip prosthesis. It is very important to obtain a primary fit, but it was also demonstrated that a hydroxiapatite-coated prosthesis is able to guarantee stability for many years after implantation.
Materials and methods. Between January 1990 and December 1994, 310 ABG hip prostheses have been implanted in our department. The follow up consisted in X-ray and DEXA (double foton scans) performed at 3, 6 an 12 months after the implantation and then annually.
Results. We evaluated the patients using Merle d,Aubignè scores for joint efficiency and pain.
Conclusions. The ABG prosthesis well integrates into the bone, getting also an optimal distribution of the mechanical stresses. The press-fit system achieves a very good primary stabilitv and tho HA-coating guarantees a long term stability.