Title: Func􀆟 onal naviga􀆟 on in hip resurfacing using the corin op􀆟 mized posi􀆟 oning system

Biography:

Waters G is an Orthopaedic Registrar at Fiona Stanley Hospital in Perth, Australia. She completed her post-graduate Bachelor of Medicine and Surgery at the University of
Western Australia in 2014.

Abstract

Acetabular malposi􀆟 on in total hip arthroplasty can lead
to instability, impingement, and edge loading resul􀆟 ng in
eccentric loading and increased wear that can lead to bearing
failure. Eccentric wear in metal on metal bearings used in
Birmingham Hip Resurfacings (BHR) produces metal debris.
Moun􀆟 ng body of evidence sugges􀆟 ng that one generic
zone such as Lewennik’s “safe zone” is unreliable. Funcô€†Ÿ onal
posi􀆟 oning of acetabular component rela􀆟 ve to pa􀆟 ent
specifi c dynamic pelvic 􀆟 lt throughout a range of ac􀆟 vi􀆟 es is
crucial. The aim use OPS to analyze pre-opera􀆟 ve acetabular
posiô€†Ÿ on, determine paô€†Ÿ ent specifi c funcô€†Ÿ onal “safe-zone”
and employ customized alignment guides to implant BHR
acetabular components resul􀆟 ng in improved func􀆟 onal and
radiographical outcomes. OPS performed pre-opera􀆟 vely in
13 pa􀆟 ents to create customized implant alignment guides.
Data collected pre and post-opera􀆟 vely at 6, 12 and 52 weeks.
Primary outcome measures of func􀆟 onality including Oxford
Hip Scores, disloca􀆟 on and revision rates. OPS post-opera􀆟 vely
to evaluate posi􀆟 oning. Secondary outcome measure of
serum metals ions monitoring for metallosis. Improved Oxford
Hip Scores post-opera􀆟 vely. Currently no revision surgeries
or disloca􀆟 ons have occurred. Preliminary results from postopera
􀆟 ve OPS indicate no edge loading. Use of OPS results in
improved precision and accuracy in achieving pa􀆟 ent specifi c
funcô€†Ÿ onal acetabular “safe-zone” thus improving funcô€†Ÿ onal
outcomes and reducing edge loading in BHR.