Computer Navigation does not offer any advantage in Total Hip Replacement


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

The Journal of Arthroplasty, Volume 29, Issue 1 , Pages 167-171, January 2014screen480x480

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

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