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General Orthopaedics

TOTAL HIP ARTHROPLASTY USING IMAGELESS COMPUTER-ASSISTED HIP NAVIGATION A PROSPECTIVE RANDOMIZED STUDY

The International Society for Technology in Arthroplasty (ISTA), 28th Annual Congress. PART 2.



Abstract

Material and Methods

In a prospective randomized study of two groups of 65 patients each, we compared the acetabular component position when usingthe imageless navigation system compared to the freehand conventional technique for cementless total hip arthroplasty. The position of the component was determined postoperatively on computed tomographic scans of the pelvis.

Results

There was no significant difference for postoperative mean inclination (p=0.29), but a significant difference for mean postoperativ acetabular component anteversion (p=0.007), for mean deviation of the postoperative anteversion from the target position of 15°(p=0.02) and for the outliers regarding inclination (p=0.02) and anteversion (p<0.05) between the computer-assisted and the freehand-placement group.

Conclusions

Our results demonstrate the importance of imageless navigation for the accurate positioning of the acetabular component.


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