AB115. SOH24AB_234. Outcomes following robotic-assisted total knee arthroplasty with functional alignment in patients with a severe varus deformity of 15 degrees or more
Orthopaedic Session II

AB115. SOH24AB_234. Outcomes following robotic-assisted total knee arthroplasty with functional alignment in patients with a severe varus deformity of 15 degrees or more

Richard Hogan1, Conor Kilkenny1, Thomas Moore1, John Tadros2, Gavin Clarke2

1Department of Orthopaedic Surgery, Royal College of Surgeons in Ireland, Dublin, Ireland; 2Perth Hip and Knee, Subiaco, WA, Australia

Background: Traditionally mechanical alignment has been the gold standard for total knee replacement (TKR). Patients with moderate to severe varus deformity undergoing TKR, often require soft tissue release. The use of robotic assisted (RA)-TKR and functional alignment, should allow the surgeon to make less soft tissue releases to restore patients to constitutional varus. The purpose of this study is to assess clinical outcomes for patients undergoing RA-TKR, who had ≥15 degrees of varus deformity while manipulated under anaesthesia.

Methods: Data from all patients, with osteoarthritis, who underwent a RA-TKR under a single surgeon between December 2016 and January 2022 was collected. Data were collected pre-operatively and at 1 year follow up, for patient reported outcome measures including the Forgotten Joint Score (FJS) and Oxford Knee Score (OKS).

Results: There were 92 patients with ≥15 degrees varus who received RA-TKR. Of these, 51 had a body mass index (BMI) ≥30 kg/m2 and 41 had a BMI <30 kg/m2. There were 13 (14.1%) patients who required soft tissue release. The average varus measured intra-operatively pre-implantation was 16.4°±1.8° and post implantation was 7.9°±2.8°. Fifty-nine patients were assessed at 1 year follow up, the average FJS was 78.6±20.4 and the average OKS at 1 year follow up was 44.3±4.3.

Conclusions: Following primary RA-TKR, patients with varus deformity ≥15 degrees, had good patient reported outcomes with low numbers of soft tissue release. Patients with a BMI ≥30 kg/m2 also had satisfactory patient reported outcomes.

Keywords: Total knee replacement (TKR); robotic surgery; constitutional varus; functional alignment; soft tissue release

Acknowledgments

Funding: None.

Footnote

Conflicts of Interest: The authors have no conflicts of interest to declare.

Ethical Statement: The authors are accountable for all aspects of the work in ensuring that questions related to the accuracy or integrity of any part of the work are appropriately investigated and resolved.

Open Access Statement: This is an Open Access article distributed in accordance with the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International License (CC BY-NC-ND 4.0), which permits the non-commercial replication and distribution of the article with the strict proviso that no changes or edits are made and the original work is properly cited (including links to both the formal publication through the relevant DOI and the license). See: https://creativecommons.org/licenses/by-nc-nd/4.0/.

doi: 10.21037/map-24-ab115
Cite this abstract as: Hogan R, Kilkenny C, Moore T, Tadros J, Clarke G. AB115. SOH24AB_234. Outcomes following robotic-assisted total knee arthroplasty with functional alignment in patients with a severe varus deformity of 15 degrees or more. Mesentery Peritoneum 2024;8:AB115.

Article Options

Download Citation

Share