Clinico-Radiological and Functional Results of the Navigated Gradius (Gradually Reducing Radius) Knee Prosthesis at Shor
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ORIGINAL ARTICLE
Clinico‑Radiological and Functional Results of the Navigated Gradius (Gradually Reducing Radius) Knee Prosthesis at Short to Mid‑Term Follow‑Up Mrinal Sharma1,2 · Bharat Dhanjani1 · Jibran Bashir1 · Anshu Kumar Anshu1 Received: 12 July 2020 / Accepted: 16 September 2020 © Indian Orthopaedics Association 2020
Abstract Background Navigated total knee replacements (TKR) have shown better knee function and quality of life. It also reduces revision rates. The aim of our study is to evaluate short to mid-term clinico-radiological and functional results, survival rate and complications of Gradius knee prosthesis implanted using computer navigation. Methods We retrospectively reviewed 120 Gradius knee prosthesis, implanted in 68 patients (52 bilateral TKR and 16 unilateral TKR) and followed from Jan 2015 till Jan 2020. Pre-operative & post-operative radiographs, knee society scores (KSS), range of motion (ROM), deformity assessment and gait video recordings were done for all patients. Results The mean follow-up was 3.8 years (minimum 2–5 years).The mean ROM was 2° (0–10) extension to 135° (128°– 138°) flexion. The KSS pain score improved from mean of 38.3 (range 26–44) to 90.4 (mean 88–92). The KSS functional score improved from 36.2 (range 28–39) to 92.6 (range 86–94). All patients had excellent to good function during successive follow-ups. The coronal alignment improved from 8° varus to 0.3° varus. Sagittal alignment was corrected from 8° (4°–18°) preoperatively to 2° (0°–8°) postoperatively Conclusion At mid-term our series outlines the better functional and radiological results of Gradius knee prosthesis using navigation as a tool. We recommend a prospective randomized controlled trials comparing navigated versus non-navigated for Gradius knee prosthesis with long-term follow-up. Keywords Total knee replacement · Navigation · Range of motion · Gradius knee prosthesis · Knee society score
Introduction Although use of computer navigation in knee replacement surgery started 20 years ago, it has still not gained widespread popularity despite the proven advantages of placing the prosthesis in correct alignment, less blood loss and less chances of fat embolism [1]. Computer navigation has also shown to reduce outliers in post-operative alignment compared to conventional and patient-specific instrumentation [2]. Navigated total knee replacements have also been reported to have a better knee function and quality of life [3]. * Mrinal Sharma [email protected] 1
Department of Orthopedic Surgery, Asian Institute of Medical Sciences, Faridabad, Haryana, India
1203, Imperial Court Tower 2, Jaypee Greens Wish Town, Gautam Budh Nagar, Noida, Uttar Pradesh 201304, India
2
It has also been proven to reduce revision rates in patients less than 65 years of age [4]. Lako et al. reported that computer navigation allowed a less experienced and low-volume orthopaedic surgeon to make the implantation of endoprosthesis more accurate, to decrease the total revision rate, and thus to ensure a higher pr
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