Impact of preoperative and constitutional alignment on soft tissue stiffness in robot-assisted total knee arthroplasty.

ABSTRACT:

Background

Although robot-assisted TKA improves alignment accuracy, the understanding of soft tissue stiffness remains limited. This study aimed to investigate the impact of preoperative and constitutional alignment on the stiffness of knee compartments during robot-assisted TKA.

Methods

We included 151 patients who underwent primary robot-assisted TKA between May 2021 and May 2022. A digital joint-tensioning device was used intraoperatively to apply stepwise increasing tension (30-90 N) to the medial and lateral knee compartments. The device measured corresponding gap changes at 0°, 10°, and 90° of flexion. Linear regression was used to analyze the relationship between gap changes and applied tension, and the regression slope (K value) was used to compare stiffness between

SUBMITTER: Wang Z 

PROVIDER: S-EPMC12519729 | biostudies-literature | 2025 Oct

REPOSITORIES: biostudies-literature