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International Orthopaedics

Erschienen in:

15.08.2021 | Original Paper

Imageless robotic-assisted total knee arthroplasty accurately restores the radiological alignment with a short learning curve: a randomized controlled trial

verfasst von: Satit Thiengwittayaporn, Pinyong Uthaitas, Chaipipathn Senwiruch, Natthapong Hongku, Revit Tunyasuwanakul

Erschienen in: International Orthopaedics | Ausgabe 11/2021

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Abstract

Purpose

The study compared a novel imageless robotic-assisted total knee arthroplasty (RATKA) and conventional TKA by considering (1) radiological outcomes, (2) outliers of radiological outcomes, and (3) learning curve.

Methods

This prospective randomized controlled study performed by a single surgeon evaluated 152 patients (152 knees): 75 patients undergoing RATKA and 77 patients undergoing conventional TKA. Mechanical alignment, radiological implant positioning, and outliers were analyzed for radiological outcomes. Cumulative summation (CUSUM) analysis was used to assess the learning curve for operative time in RATKA.

Results

The RATKA had significantly better accuracy of knee alignment and component positioning than conventional TKA. The hip-knee-ankle axis and implant position outliers were significantly lower in the RATKA, with 94.7% of patients had achieved an overall mechanical alignment within 3° of a neutral mechanical axis. Changes in posterior condylar offset and joint line were significantly lower in the RATKA. A learning curve of seven cases for operative time was obtained for the RATKA.

Conclusion

The imageless RATKA has better alignment accuracy with a short learning curve; thus, it presents an attractive option for TKA.

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Titel: Imageless robotic-assisted total knee arthroplasty accurately restores the radiological alignment with a short learning curve: a randomized controlled trial
verfasst von: Satit Thiengwittayaporn
Pinyong Uthaitas
Chaipipathn Senwiruch
Natthapong Hongku
Revit Tunyasuwanakul
Publikationsdatum: 15.08.2021
Verlag: Springer Berlin Heidelberg
Erschienen in: International Orthopaedics / Ausgabe 11/2021
Print ISSN: 0341-2695
Elektronische ISSN: 1432-5195
DOI: https://doi.org/10.1007/s00264-021-05179-y

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