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Related Concept Videos

Knee Joint01:23

Knee Joint

3.1K
The knee joint is the most complicated joint in the body. It consists of three articulations– two tibiofemoral and one patellofemoral. As is characteristic of synovial joints, the knee joint has a thin articular capsule that partially surrounds this joint cavity. Additionally, several ligaments, muscles, and cartilaginous structures support the movement of the knee.
A total of seven ligaments support the knee joint. The patellar ligament, which is also attached to the quadriceps femoris...
3.1K

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Exploring Knee Alignment: Demystifying Traditional and Emerging Approaches.

Mohammed Elmajee1, Mahmoud Mersal2, Walid Ben Nafa3

  • 1Trauma and Orthopaedics, Royal Orthopaedic Hospital NHS Foundation Trust, Birmingham, GBR.

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|October 3, 2025
PubMed
Summary

Total knee replacement (TKR) outcomes depend on knee alignment. Kinematic alignment (KA), which restores prearthritic alignment, shows promise for improved patient satisfaction and function compared to traditional methods.

Keywords:
adjusted mechanical alignmentfunctional alignmentkinematic alignmentknee replacement surgerymechanical alignmentpatient satisfaction tkapersonalized knee alignmentrestricted kinematic alignment (rka)soft tissue balancingtotal knee arthroplasty

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Area of Science:

  • Orthopedic Surgery
  • Biomechanical Engineering
  • Arthroplasty Research

Background:

  • Knee alignment is critical for total knee replacement (TKR) success, affecting function, pain, and implant longevity.
  • Traditional mechanical axis alignment has been standard, but kinematic alignment (KA) is gaining traction.
  • Individualized approaches, including KA, aim to optimize TKR outcomes by considering patient-specific anatomy.

Purpose of the Study:

  • To comprehensively review and analyze various knee alignment philosophies in TKR.
  • To evaluate the theoretical foundations, clinical outcomes, and impact of mechanical axis versus kinematic alignment (KA).
  • To highlight the emerging role and potential benefits of KA in TKR.

Main Methods:

  • Systematic review and critical evaluation of existing literature on TKR alignment philosophies.
  • Synthesis of contemporary evidence on the efficacy of mechanical axis, kinematic alignment (KA), and restricted kinematic alignment (rKA).
  • Analysis of studies focusing on patient satisfaction, functional recovery, and implant longevity associated with different alignment techniques.

Main Results:

  • Emerging evidence suggests kinematic alignment (KA) may lead to increased patient satisfaction and improved functional outcomes compared to traditional methods.
  • Restricted kinematic alignment (rKA) shows potential for improved outcomes over the mechanical axis, but requires further investigation.
  • No single alignment strategy is universally superior; individualized approaches, including KA, show promise for enhanced TKR results.

Conclusions:

  • Kinematic alignment (KA) represents a promising technique for optimizing total knee replacement outcomes.
  • A patient-specific approach, incorporating KA principles, may lead to superior functional recovery and implant longevity.
  • Continued research is essential to refine alignment strategies and enhance TKR results for diverse patient populations.