The trauma shoulder endoprosthesis of the Swiss company Mathys Ltd has been successfully implanted more than 5000 times. The positive results motivated the orthopaedic company to further develop its product.

The trauma prosthesis has proven itself since its introduction in the year 2000. The primary cementing of the stem without using a trial prosthesis, the continuous height and retroversion adjustment possibilities and the easy surgical technique have also contributed to the success together with the possibility for an exact and firm fixation of the tubercles.

The prosthesis head is made of Bionit a bio ceramic produced by Mathys itself. Advantages lie in the material which is inert (bio compatible) and can be used without reservations for allergic persons.

The middle part is manufactured with a unique surface structure so tubercles can be fixed firmly. An optimal ligament balancing is possible thanks to the simple adjustment option (height and retroversion) mentioned above.

Mathys has developed its Articula. The result is called Affinis Fracture and offers the same advantages which characterise the todays Articula prosthesis. Affinis Fractures main differing feature is the middle part: The established surface structure (spike structure) has been given a bio active calcium phosphate coating (CaP). This has a capillary effect on the blood and activates surrounding bone to grow onto the implant.

Affinis Fracture addresses the problem of the disappearing tubercles. Not only does the calcium phosphate, which transforms into natural bone, improve the on growth of tubercles the additional lateral re-fixation drill further supports the anatomic reintegration. A world wide launch of Affinis Fracture is planned for 2008.