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Greater accuracy in positioning of the acetabular cup by using an image-free navigation system
- Source :
- International Orthopaedics. 29:272-276
- Publication Year :
- 2005
- Publisher :
- Springer Science and Business Media LLC, 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 degrees (range: 30 degrees -53 degrees ; SD+/-7.0 degrees ) and an average anteversion of 24.0 degrees (range: -3 degrees to 51 degrees ; SD+/-15.0 degrees ) were found in the control group, and an average inclination of 45.0 degrees (range: 40 degrees -50 degrees ; SD+/-2.8 degrees ) and an average anteversion of 14.4 degrees (range: 5 degrees -25 degrees ; SS+/-5.0 degrees ) in the computer-assisted study group. The deviations from the desired cup position (45 degrees inclination, 15 degrees anteversion) were significantly lower in the computer-assisted study group (p0.001 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).
- Subjects :
- Male
medicine.medical_specialty
Arthroplasty, Replacement, Hip
medicine.medical_treatment
Treatment outcome
Osteoarthritis, Hip
Statistics, Nonparametric
Clinical study
Humans
Medicine
Orthopedics and Sports Medicine
Prospective Studies
Aged
Hip surgery
Orthodontics
Original Paper
business.industry
Computer assistance
Navigation system
Acetabulum
Middle Aged
Arthroplasty
Surgery
Treatment Outcome
Surgery, Computer-Assisted
Cup position
Female
Hip Prosthesis
business
Subjects
Details
- ISSN :
- 14325195 and 03412695
- Volume :
- 29
- Database :
- OpenAIRE
- Journal :
- International Orthopaedics
- Accession number :
- edsair.doi.dedup.....a3656c87972b7416566f86694fca19d7