Prosthetic orientation, limb alignment, and soft tissue balance with bi-cruciate stabilized total knee arthroplasty: a comparison between the handheld robot and conventional techniques

Purpose This study aimed to examine the prosthetic orientations, limb alignment, intraoperative soft tissue balance, and early clinical outcomes associated with the use of the relatively new handheld robot technique compared to those associated with the use of the conventional alignment guide for bi...

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Bibliographic Details
Published in:International orthopaedics 2023-06, Vol.47 (6), p.1473-1480
Main Authors: Matsumoto, Tomoyuki, Nakano, Naoki, Hayashi, Shinya, Takayama, Koji, Maeda, Toshihisa, Ishida, Kazunari, Kuroda, Yuichi, Matsushita, Takehiko, Niikura, Takahiro, Muratsu, Hirotsugu, Kuroda, Ryosuke
Format: Article
Language:English
Subjects:
Arthroplasty, Replacement, Knee - adverse effects
Arthroplasty, Replacement, Knee - methods
Humans
Knee Joint - surgery
Medicine
Medicine & Public Health
Original Paper
Orthopedics
Osteoarthritis, Knee - surgery
Retrospective Studies
Robotics
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Summary:Purpose This study aimed to examine the prosthetic orientations, limb alignment, intraoperative soft tissue balance, and early clinical outcomes associated with the use of the relatively new handheld robot technique compared to those associated with the use of the conventional alignment guide for bi-cruciate stabilized total knee arthroplasty (TKA). Methods This retrospective cohort study compared the prosthetic orientation and limb alignment of 35 patients who underwent TKA using robotic assistance (robot group) with those of patients who underwent TKA using a conventional alignment guide (control group). The coronal femoral component alignment (FCA), coronal tibial component alignment (TCA), and the hip-knee-ankle (HKA) angle were compared between groups. Intraoperative soft tissue balance, including the joint component gap and varus/valgus balance assessed by an offset-type tensor, were also compared between groups. One year postoperatively, the clinical outcomes, including the range of motion and 2011 Knee Society Score (KSS), were compared between groups. Results The HKA angle and FCA were 0.1° varus and 0.1° varus, respectively, in the robot group and 1.3° varus and 1.3° varus, respectively, in the control group. The difference in the HKA angle and the FCA, but not the TCA, between groups was statistically significant ( p  
ISSN:0341-2695
1432-5195
DOI:10.1007/s00264-023-05737-6