Acetabular Component Positioning in Total Hip Arthroplasty With and Without a Computer-Assisted System: A Prospective, Randomized and Controlled Study
Henrique M.C. Gurgel, PhD, Alberto T. Croci, PhD, Henrique A.B.A. Cabrita, PhD, José Ricardo N. Vicente, PhD, Marcos C. Leonhardt, João Carlos Rodrigues
Aim: To study the acetabular component positioning using imageless navigation compared with conventional technique
Level of Evidence: level 1 Randomised Control Trial
Methods: 40 patients undergoing THA were randomized into 2 groups; group 1 – 20 patients (navigated, NAV) and group 2 – 20 patients (conventional, CON). Post surgery, the operative inclination and anteversion of the acetabular component was studied with reference to the Lewinnek’s safe zone using computerised tomography.
Results: No statistical difference could be noted between the two techniques. 90% of the sockets in NAV group and 80% of the sockets in CON group were placed with in the safe zone (P = 0.661). The mean inclination was 41.7° in NAV group and 42.2° in the CON group (P = 0.663) and the mean anteversion in NAV group was 17.4° compared to 14.5° in the CON group (P = 0.215).
Conclusion: Computer navigation does not improve acetabular component positioning in total hip arthroplasty
Strengths: Randomised, Level I evidence
Weakness: small representative sample size
Submitted by Dr Ashok Gavaskar