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Orthopaedic Proceedings
Vol. 99-B, Issue SUPP_8 | Pages 19 - 19
1 Apr 2017
Corrado P Alan P Michael S
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Background

As the number of ceramic THR bearings used worldwide is increasing, the number of implants that experience off-normal working conditions, e.g. edge loading, third bodies in the joint, soft tissues laxity, dislocation/subluxation of the joint, increases too. Under all such conditions the bearing surfaces can be damaged, leading eventually to a limitation of the expected performances of the implant.

Methods

We characterised the damage resistance of different bearing surfaces (alumina matrix composite BIOLOXdelta, alpha-alumina BIOLOXforte, zirconia 3Y-TZP, oxidized zirconium alloy Zr-2.5Nb, CoCr-alloy) by scratch tests performed following the European standard EN 1071–3:2005. Also the scratch hardness of same materials has been assessed.


Orthopaedic Proceedings
Vol. 98-B, Issue SUPP_9 | Pages 9 - 9
1 May 2016
Malerba G De Santis V Francesco B Logroscino G Carmine D Corrado P Maccauro G
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Introduction

The number of total hip arthroplasties in young patients is continuosly increasing. Nowdays, the study of the materials wear, with the goal of improving the survivorship of implants, represents a fundamental subject in this kind of surgery. The role of ceramic materials in the valutation of types of wear is particularly known.

Materials and Methods

We have selected 834 patients, underwent total hip arthroplasty, in which a ceramic head was impalnted with a maximum follow up of ten years. 367 patients were males and 467 were females, operated by 14 surgeons of the same equipe of Orthopaedic and Traumatology Department. A postero-lateral approach, according to Gibson Moore, and an extrarotator tendons transosseal repair was performed.