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2026, Number 3

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Acta Med 2026; 24 (3)

Difference in surgical time between conventional and robotic-assisted total knee arthroplasty in patients with primary gonarthrosis

Villalobos MJ, Moguel SI, Villalobos RA, Hernández MJR

Language: Spanish
References: 25
Page: 237-242
PDF size: 575.40 Kb.


ABSTRACT

Introduction: robotic-assisted total knee arthroplasty (TKA) has been designed to improve surgical precision but concerns exist about longer operative time compared to traditional techniques. Objective: to compare operative time between robotic-assisted and traditional TKA in primary gonarthrosis. Material and methods: this retrospective comparative study included ninety-four adult patients undergoing unilateral primary TKA for primary gonarthrosis from March 2023 to March 2025 at a single center. All surgeries used the same implant (Triathlon, Stryker), subvastus approach and surgical team. Patients were grouped by technique: robotic-assisted (Mako, Stryker; n = 59) or manual (n = 35). Operative time was defined as time from skin incision to wound closure. Group comparisons used independent t-tests or Mann-Whitney U tests and multiple linear regression adjusted for age, sex, BMI and Kellgren-Lawrence grade. Results: baseline characteristics were similar except for age with the robotic group being younger. Unadjusted analysis showed no significant difference in surgical time between groups. Multivariable regression showed that robotic assistance was not associated with longer operative time (β = 5.98 minutes; 95%CI: -4.73 to 16.68; p = 0.27) after adjusting for covariates. No covariate independently predicted surgical time. Conclusions: robotic-assisted TKA was not associated with a statistically significant increase in surgical time compared to conventional TKA.


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