Acetabular Cup Orientation in Total Hip Replacement: Comparison of Freehand vs Navigation Assisted vs Mechanical Jig Assisted Cup Placement - Softcover

Kini, Abhishek; Kumar, Ajith; Shetty, Shantharam

Softcover

ISBN 10: 3848480727 ISBN 13: 9783848480722

Publisher: LAP LAMBERT Academic Publishing, 2012

Synopsis

Acetabular cup orientation is an important determinant for the success of total hip replacement (THR). The optimal position as described by Lewinnek et al is 40+/-10 of inclination and 15+/-10 of anteversion. Though this is a broad range, to stay within these parameters is difficult considering the advanced stage of disease, dysplasias and defect in acetabulum. To meet this requirement various modes of cup placements have been developed from the traditional free hand cup placement to jig assisted cup placement to the present computer assisted navigation system. We undertook this study to compare the various methods of cup placement i.e. free-hand, mechanical jig assisted and the navigation assisted cup placement and to evaluate which method gives the least variation in cup placement.75 patients were enrolled and further randomly divided into groups of 25 each for free-hand, jig assisted and navigation assisted cup placement. Stryker CART II navigation system was used. Intra-operative the target inclination was 40-45 and anteversion was 15. Our confirmation with postop CT scan measurement has shown that consistent acetabular component orientation in THR is possible using navigation.

About this title

About the Author

Abhishek R Kini, MBBS.,MS.,DNB(Orthopaedics), studied at the SSIOT, Mangalore. Has extensive research on Spine and Navigation assisted Joint replacement. Presently associated with ASMI, Mumbai, manages complex ligamentous injuries and promotes Joint Preservation.

Edition details

• Publisher: LAP LAMBERT Academic Publishing
• Publication date: 2012
• Language: English
• ISBN 10: 3848480727
• ISBN 13: 9783848480722
• Binding: Paperback
• Number of pages: 76