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Orthopaedic Proceedings
Vol. 98-B, Issue SUPP_8 | Pages 136 - 136
1 May 2016
Lapaj L Mroz A Wendland J Markuszewski J Kruczynski J
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Introduction

Dislocation of an uncemented total hip replacement (THR) can cause damage to the femoral hear, when it passes through the rim of metal acetabular shell. This can lead to metal transfer on the surface of the head or chipping of bulk head material. Although dislocation is one of most common complications in total hip arthroplasty (THA), little is known if causes any further damage to the articulating surface of ceramic heads in long term observations.

Aim of the study

To evaluate, if dislocations of THR with ceramic on polyethylene bearing causes structural damage to the articulating surface of the femoral head in a follow-up of minium 10 years


Orthopaedic Proceedings
Vol. 98-B, Issue SUPP_8 | Pages 135 - 135
1 May 2016
Lapaj L Mroz A Markuszewski J Kruczynski J Wendland J
Full Access

Introduction

Backside wear of polyethylene (PE) inlays in fixed-bearing total knee replacement (TKR) generates high number of wear debris, but is poorly studied in modern plants with improved locking mechanisms.

Aim of study

Retrieval analysis of PE inlays from contemporary fixed bearing TKRs - to evaluate the relationship between backside wear and liner locking mechanism and material type and roughness of the tibial tray.


Orthopaedic Proceedings
Vol. 98-B, Issue SUPP_8 | Pages 134 - 134
1 May 2016
Lapaj L Mroz A Wendland J Markuszewski J
Full Access

Introduction

Titanium nitride (TiN) coatings are used in total hip arthroplasty to reduce friction of bearing couples or to decrease the allergic potential of orthopaedic alloys. Little is known about performance of currently manufactured implants, since only few retrieval studies were performed, furthermore they included a small number of implants manufactured over 15 years ago.

Aim of study

To examine wear and degradation of retrieved TiN coated femoral heads articulating with ultra-high molecular weight polyethylene (UHMWPE).