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Related Experiment Video

Updated: Jun 9, 2026

Three-Dimensional Preoperative Virtual Planning in Derotational Proximal Femoral Osteotomy
08:15

Three-Dimensional Preoperative Virtual Planning in Derotational Proximal Femoral Osteotomy

Published on: February 17, 2023

Coronal plane alignment changes do not affect in vivo kinematics for robotically performed total knee arthroplasty.

Cham-Kit Wong1, Michael LaCour2, Garett Dessinger2

  • 1Department of Orthopaedics and Traumatology Prince of Wales Hospital Shatin Hong Kong SAR, China.

Journal of Experimental Orthopaedics
|June 8, 2026
PubMed
Summary

Related Concept Videos

Functional Classification of Joints01:09

Functional Classification of Joints

Functional Classification of Joints
The functional classification of joints is determined by the amount of mobility between the adjacent bones. Joints are functionally classified as a synarthrosis or immobile joint, an amphiarthrosis or slightly moveable joint, or as a diarthrosis, a freely moveable joint. Fibrous and cartilaginous joints can be functionally classified as either synarthroses  or amphiarthroses, whereas all synovial joints are classified as diarthroses.
Synarthrosis
An immobile...

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The Journal of arthroplasty·2026

Changes in coronal plane alignment of the knee (CPAK) after robotic-assisted total knee arthroplasty (TKA) did not impact patient kinematics or short-term outcomes. This suggests flexibility in alignment strategies for TKA procedures.

Area of Science:

  • Orthopedic Surgery
  • Biomechanical Engineering
  • Medical Imaging

Background:

  • Total knee arthroplasty (TKA) improves pain and function but 10% of patients report dissatisfaction.
  • Mechanically aligned (MA) TKA may not replicate native knee function.
  • Kinematic alignment (KA) aims to restore pre-arthritic alignment for better outcomes.

Purpose of the Study:

  • To investigate the impact of coronal plane alignment of the knee (CPAK) changes on in vivo weight-bearing kinematics after robotic-assisted TKA.
  • To evaluate if CPAK alterations affect short-term clinical outcomes following TKA.
  • To assess kinematics using fluoroscopy in patients undergoing TKA with MA or KA.

Main Methods:

  • Retrospective analysis of robotic-assisted TKAs (2019-2023) with Journey II BCS implants.
Keywords:
CPAK classificationcoronal plane alignmentin vivo kinematicsrobotic‐assisted surgerytotal knee arthroplasty

Related Experiment Videos

Last Updated: Jun 9, 2026

Three-Dimensional Preoperative Virtual Planning in Derotational Proximal Femoral Osteotomy
08:15

Three-Dimensional Preoperative Virtual Planning in Derotational Proximal Femoral Osteotomy

Published on: February 17, 2023

  • Collected demographic, operative, and 12-month Knee Society Scores (KSS/KSFS).
  • Fluoroscopic analysis of weight-bearing deep knee bends to extract kinematics; CPAK calculated from radiographs. Cohorts: CPAK change (n=33) vs. no change (n=9).

    • Main Results:

    • No significant differences in maximum flexion, condylar rollback, or axial rotation between CPAK change and no change groups.
    • Similar improvements in KSFS and KSS between the two cohorts.
    • Post-operative CPAK 3 was the most common alignment (45.2%).

    Conclusions:

    • Changes in CPAK following robotic-assisted TKA do not adversely affect in vivo kinematics.
    • Short-term clinical outcomes (KSS/KSFS) are not significantly impacted by CPAK alterations.
    • Alignment flexibility within precise robotic techniques may be permissible in TKA.