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Clinico-Radiological and Functional Results of the Navigated Gradius (Gradually Reducing Radius) Knee Prosthesis at Short to Mid-Term Follow-Up

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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.

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Authors and Affiliations

  1. Department of Orthopedic Surgery, Asian Institute of Medical Sciences, Faridabad, Haryana, India

    Mrinal Sharma, Bharat Dhanjani, Jibran Bashir & Anshu Kumar Anshu

  2. 1203, Imperial Court Tower 2, Jaypee Greens Wish Town, Gautam Budh Nagar, Noida, Uttar Pradesh, 201304, India

    Mrinal Sharma

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  1. Mrinal Sharma
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Contributions

All authors contributed to the study conception and design. Material preparation, data collection and analysis were performed by all the authors. The final draft of the manuscript was written by senior author (MS) and all authors commented on previous versions of the manuscript. All authors read and approved the final manuscript.

Corresponding author

Correspondence to Mrinal Sharma.

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All authors declare that they have no conflict of interest.

Ethical Approval

The study was approved by ethical review committee of our hospital.

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Written informed consent was taken from all the patients included in the study before writing this article.

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Sharma, M., Dhanjani, B., Bashir, J. et al. Clinico-Radiological and Functional Results of the Navigated Gradius (Gradually Reducing Radius) Knee Prosthesis at Short to Mid-Term Follow-Up. JOIO 55 (Suppl 1), 62–68 (2021). https://doi.org/10.1007/s43465-020-00266-5

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  • DOI: https://doi.org/10.1007/s43465-020-00266-5

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