Abstract
The problem of modular acetabular cups in total hip replacement (THR) links with its survival, unpredictable because of wear and fixation. In fact, while primary fixation is not a problem, the use of screws could generate bone resorption. A monoblock cup made by tantalum and polyethylene insert is available since some years. Tantalum is a metal element with an elasticity intermediate between cortical and trabecular bone, a three times higher porosity than titanium and a very high ductility. These features allow a very high primary and secondary stability eliminating movements between insert and metal.
From 2001 we started using the TMT cup and we performed 48 implants in 45 patients: 18 male and 30 female. The mean age was 64 years old.. 80% of the patients were affected of primary arthritis, 20% avascular head necrosis and fracture. In last 20 procedures we perform a minimal invasive approach (around 9 cm.). The mean follow up was 26 months. We reported no infections, no loosening and 1 traumatic dislocation. Follow up showed good stability on the acetabular side.
In conclusion we can affirm that, despite our preliminary results, the tantalum cup could open new perspectives in primary hip replacements.
Correspondence should be addressed to Ariella Neustadt at Studio EGA, Professional Congress Organisers, Viale Tiziano, 19 - 00196, Rome - Italy.
