PDF herunterladen
J Knee Surg 2019; 32(03): 239-250
DOI: 10.1055/s-0038-1641729
Original Article
Thieme Medical Publishers 333 Seventh Avenue, New York, NY 10001, USA.

Robotic-Arm Assisted Total Knee Arthroplasty Demonstrated Greater Accuracy and Precision to Plan Compared with Manual Techniques

Emily L. Hampp
1   Implant and Robotic Research, Stryker, Mahwah, New Jersey
,
Morad Chughtai
2   Department of Orthopaedics, Cleveland Clinic, Cleveland, Ohio
,
Laura Y. Scholl
1   Implant and Robotic Research, Stryker, Mahwah, New Jersey
,
Nipun Sodhi
3   Department of Orthopaedics, Lenox Hill Hospital, New York, New York
,
Manoshi Bhowmik-Stoker
1   Implant and Robotic Research, Stryker, Mahwah, New Jersey
,
David J. Jacofsky
4   Department of Adult Reconstruction, The CORE Institute, Phoenix, Arizona
,
Michael A. Mont
3   Department of Orthopaedics, Lenox Hill Hospital, New York, New York
› Institutsangaben Funding This study was partially funded by an educational grant from Stryker. Three of the authors are employed by Stryker (E.L.H., L.Y.S., and M.B-S.). Three of the authors are paid consultants for Stryker (D.J.J., M.A.M., and M.C.).
Weitere Informationen

Publikationsverlauf

31. Januar 2018

25. Februar 2018

Publikationsdatum:
01. Mai 2018 (online)

   Lizenzen und Reprints
Zoom Image

Abstract

This study determined if robotic-arm assisted total knee arthroplasty (RATKA) allows for more accurate and precise bone cuts and component position to plan compared with manual total knee arthroplasty (MTKA). Specifically, we assessed the following: (1) final bone cuts, (2) final component position, and (3) a potential learning curve for RATKA. On six cadaver specimens (12 knees), a MTKA and RATKA were performed on the left and right knees, respectively. Bone-cut and final-component positioning errors relative to preoperative plans were compared. Median errors and standard deviations (SDs) in the sagittal, coronal, and axial planes were compared. Median values of the absolute deviation from plan defined the accuracy to plan. SDs described the precision to plan. RATKA bone cuts were as or more accurate to plan based on nominal median values in 11 out of 12 measurements. RATKA bone cuts were more precise to plan in 8 out of 12 measurements (p ≤ 0.05). RATKA final component positions were as or more accurate to plan based on median values in five out of five measurements. RATKA final component positions were more precise to plan in four out of five measurements (p ≤ 0.05). Stacked error results from all cuts and implant positions for each specimen in procedural order showed that RATKA error was less than MTKA error. Although this study analyzed a small number of cadaver specimens, there were clear differences that separated these two groups. When compared with MTKA, RATKA demonstrated more accurate and precise bone cuts and implant positioning to plan.

Keywords

robotic - total knee arthroplasty - accuracy - precision - alignment