Accuracy of Acetabular Cup Positioning in Robotic-Assisted Total Hip Arthroplasty
Author Information
Author(s): Singh Ashish, Kumar Purushotam, Kalyan Kanukuntla, Gundalli Akash Chandrashekar, Mane Sudhir Shankar, Swarnkar Himanshu, Singh Lavanya
Primary Institution: Anup Institute of Orthopaedics & Rehabilitation
Hypothesis
Do the values of cup version and inclination measured in the postoperative CT scans correlate with the intraoperatively measured and preoperatively planned values?
Conclusion
Robotic-assisted guidance ensures consistent cup inclination, but there may be more variability in achieving the planned anteversion.
Supporting Evidence
- Robotic-assisted THA showed improved precision for cup inclination.
- Significant differences in preoperative inclination between rTHA and cTHA cohorts.
- Both groups had no significant differences in the proportion of cups outside the referenced safe zones.
Takeaway
This study looked at how well robots can help doctors place hip joint parts during surgery. It found that while robots are good at keeping the angle right, they sometimes struggle with the direction.
Methodology
A single-center prospective cohort study with 151 patients undergoing THA, comparing robotic-assisted and conventional methods.
Potential Biases
Potential bias due to the single surgeon's learning curve and the age difference between cohorts.
Limitations
No randomization between cohorts, significant age difference between groups, and findings based on a single surgeon's experience.
Participant Demographics
151 patients, with 108 in the robotic-assisted group and 43 in the conventional group; mean age 44.65 years for rTHA and 53.88 years for cTHA.
Statistical Information
P-Value
p<0.001
Confidence Interval
95% predictive interval for inclination: -5.32 to 5.01°, anteversion: -5.36 to 4.38°.
Statistical Significance
p<0.001
Digital Object Identifier (DOI)
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