Precision of robotic guided instrumentation for acetabular component positioning

Vaibhav Kanawade; Lawrence D Dorr; Scott A Banks; Zenan Zhang; Zhinian Wan

doi:10.1016/j.arth.2014.10.021

Precision of robotic guided instrumentation for acetabular component positioning

J Arthroplasty. 2015 Mar;30(3):392-7. doi: 10.1016/j.arth.2014.10.021. Epub 2014 Oct 22.

Authors

Vaibhav Kanawade¹, Lawrence D Dorr², Scott A Banks³, Zenan Zhang³, Zhinian Wan²

Affiliations

¹ Kanawade Patil House, Sangamner, India.
² Orthopedic Department, Keck Medical Center of USC, Los Angeles, California.
³ Department of Mechanical & Aerospace Engineering, University of Florida, Gainesville, Florida.

PMID: 25453633
DOI: 10.1016/j.arth.2014.10.021

Abstract

Robotic computerized instrumentation that guides bone preparation and cup implantation in total hip arthroplasty was studied. In 38 patients (43 hips) intraoperative cup inclination and anteversion were validated by postoperative CT scans. Planned inclination was 39.9°±0.8° and with robotic instrumentation was 38. 0°±1.6° with no outliers of 5°; on the postoperative CT scan there were 5 outliers (12%). Planned anteversion was 21.2°±2.4° and intraoperatively was 20.7°±2.4° with no outlier of 5°; on the CT there were 7 outliers (16%). The center of rotation (COR) was superior by a mean 0.9±4.2 mm and medial by 2.7±2.9 mm. This robotic instrumentation achieved precision of inclination in 88%, anteversion in 84% and COR in 81.5%.

Keywords: MAKO; THR; computer; cup position; robot.

MeSH terms

Acetabulum / surgery*
Aged
Arthroplasty, Replacement, Hip / instrumentation*
Female
Hip Dislocation, Congenital / surgery
Hip Joint / diagnostic imaging
Hip Prosthesis*
Humans
Male
Middle Aged
Osteoarthritis, Hip / surgery*
Prospective Studies
Robotic Surgical Procedures / instrumentation*
Surgery, Computer-Assisted / instrumentation
Tomography, X-Ray Computed