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Journal of Bone and Joint Surgery - British Volume, Vol 88-B, Issue 10, 1401-1405.
doi: 10.1302/0301-620X.88B10.17587  
Copyright © 2006 by British Editorial Society of Bone and Joint Surgery
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Orientation of the acetabular component

A COMPARISON OF FIVE NAVIGATION SYSTEMS WITH CONVENTIONAL SURGICAL TECHNIQUE

M. Honl, Dr. med, Dr. Ing.habil, Professor, Orthopaedic Surgeon1; K. Schwieger, Dr. Ing, Group Leader2; M. Salineros, MD, Orthopaedic Surgeon3; J. Jacobs, MD, Professor, Orthopaedic Surgeon3; M. Morlock, Dr. habil, PhD, Professor, Director of Biomechanics4; and M. Wimmer, Dr.Ing, Professor, Director of Tribology3

1 Department of Orthopaedic Surgery, LKH Klagenfurt, A-9020 Klagenfurt, St. Veiter Strasse 47, Carinthia, Austria.
2 AO Research Institute, Clavadelerstrasse 8, CH-7270 Davos Platz, Switzerland.
3 Biomechanics Section, TU Hamburg-Harburg, Denickestrasse 15, D-21073, Hamburg, Germany.
4 Rush University Medical Center, 1653 W. Congress Parkway, AcFac 726b, Chicago, Illinois 60612, USA.

Correspondence should be sent to Professor M. Honl; e-mail: matthias.honl{at}lkh-klu.at

We compared the orientation of the acetabular component obtained by a conventional manual technique with that using five different navigation systems.

Three surgeons carried out five implantations of an acetabular component with each navigation system, as well as manually, using an anatomical model. The orientation of the acetabular component, including inclination and anteversion, and its position was determined using a co-ordinate measuring machine.

The variation of the orientation of the acetabular component was higher in the conventional group compared with the navigated group. One experienced surgeon took significantly less time for the procedure. However, his placement of the component was no better than that of the less experienced surgeons. Significantly better inclination and anteversion (p < 0.001 for both) were obtained using navigation. These parameters were not significantly different between the surgeons when using the conventional technique (p = 0.966).

The use of computer navigation helps a surgeon to orientate the acetabular component with less variation regarding inclination and anteversion.






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Hip, Knee, Trauma, Upper limb, Foot & Ankle, Paediatrics, Oncology, Spine, Arthroplasty, General