Haluk Çabuk, Kaya Turan, Osman Görkem Muratoğlu, Tuğrul Ergün, Çağatay Öztürk, Ramazan Erden Ertürer

Department of Orthopedics and Traumatology, Istinye University, Istanbul, Türkiye

Keywords: Component alignment, Microplasty®, navigation, robotics, unicompartmental knee arthroplasty.


Objectives: This study aims to compare the radiological outcomes of unicompartmental knee arthroplasty (UKA) performed by a navigation-based robotic system versus Microplasty® instrumentation.

Patients and methods: Between January 2018 and January 2019, a total of 90 knees of 75 patients (65 males, 10 females; mean age: 62.0±9.4 years; range, 50 to 73 years) were included. Among these, 54 knees underwent Oxford mobile-bearing UKA with an Microplasty® instrumentation set and 36 knees were operated with the aid of a Restoris® MCK with MAKO navigation-based robotic system. Postoperative anteroposterior and lateral X-rays of all patients were evaluated according to nine different parameters. On the femoral side, femoral varus-valgus angle, flexion-extension angle, femoral condyle posterior fit; on tibial side, tibial component varus/valgus, tibial posterior slope, medial, anterior, posterior and lateral fit of tibial component assessed.

Results: There was no significant difference between groups in terms of age, sex, and affected side. On the femoral side, no significant difference was observed in the component position between groups. On the tibial side, tibial component medial fit (p=0.032) and anterior fit (p=0.007) were better in navigation-based robotic system group.

Conclusion: Microplasty® instrumentation may lead to comparable implant positioning compared to a tactile-based navigated robotic instrumentation.

Citation: Çabuk H, Turan K, Muratoğlu OG, Ergün T, Öztürk Ç, Ertürer RE. Comparison of the radiological parameters between dynamic-referencing tactile guidance robotic system and Microplasty® instrumentation in unicompartmental knee arthroplasty. Jt Dis Relat Surg 2022;33(3):580-587.

Ethics Committee Approval

The study protocol was approved by the Istinye University Ethics Committee (date: 2/2020 no: K432). The study was conducted in accordance with the principles of the Declaration of Helsinki.

Author Contributions

Contribute the design and writing of manuscript: H.Ç.; Contribute the data analyzing and archiving: K.T., O.G.M.; Contribute for the design and forming of figures: E.E.; Contribute the analyzing of figures and collection of data and literature search: Ç.Ö., T.E.

Conflict of Interest

The authors declared no conflicts of interest with respect to the authorship and/or publication of this article.

Financial Disclosure

The authors received no financial support for the research and/or authorship of this article.