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01-10-2005 | Original Paper

Greater accuracy in positioning of the acetabular cup by using an image-free navigation system

Authors: T. Kalteis, M. Handel, T. Herold, L. Perlick, H. Baethis, J. Grifka

Published in: International Orthopaedics | Issue 5/2005

Abstract

In a prospective and randomised clinical study, acetabular cups were implanted free-hand (control group n=22) or with computer assistance using an image-free navigation system (study group n=23). The cup position was determined postoperatively on pelvic CT. An average inclination of 42.3° (range: 30°–53°; SD±7.0°) and an average anteversion of 24.0° (range: −3° to 51°; SD±15.0°) were found in the control group, and an average inclination of 45.0° (ranage: 40°–50°; SD±2.8°) and an average anteversion of 14.4° (range: 5°–25°; SS±5.0°) in the computer-assisted study group. The deviations from the desired cup position (45° inclination, 15° anteversion) were significantly lower in the computer-assisted study group (p<0.001 each). While only 11/22 of the cups in the control group were within the Lewinnek safe zone, 21/23 of the cups in the study group were placed in this target region (p=0.003).

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Title: Greater accuracy in positioning of the acetabular cup by using an image-free navigation system
Authors: T. Kalteis
M. Handel
T. Herold
L. Perlick
H. Baethis
J. Grifka
Publication date: 01-10-2005
Publisher: Springer-Verlag
Published in: International Orthopaedics / Issue 5/2005
Print ISSN: 0341-2695
Electronic ISSN: 1432-5195
DOI: https://doi.org/10.1007/s00264-005-0671-5

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Greater accuracy in positioning of the acetabular cup by using an image-free navigation system

Abstract

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Abstract

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