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Related Concept Videos

Knee Joint01:23

Knee Joint

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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...
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Development of the Limb Synovial Joints01:07

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Joints form during embryonic development in conjunction with the formation and growth of the associated bones. The embryonic tissue that gives rise to all bones, cartilage, and connective tissues of the body is called mesenchyme.
The mesenchymal stem cells differentiate into chondrocytes that form the hyaline cartilage, and later the cartilaginous model of the bone. This model further transforms into a bone. This process is known as endochondral ossification.
During development, the limbs...
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Related Experiment Video

Updated: May 7, 2026

Tissue Collection and RNA Extraction from the Human Osteoarthritic Knee Joint
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[Partial knee arthroplasty: development, current status and future perspectives].

Y L Xiong1, Y L Wang1, C Zeng1

  • 1Department of Orthopaedics, Xiangya Hospital, Central South University, Key Laboratory of Aging-Related Bone and Joint Diseases Prevention and Treatment, Ministry of Education, Hunan Key Laboratory of Joint Degeneration and Injury, National Clinical Research Center for Geriatric Disorders (Xiangya Hospital), Changsha 410008, China.

Zhonghua Yi Xue Za Zhi
|September 15, 2025
PubMed
Summary
This summary is machine-generated.

Partial knee arthroplasty (PKA) offers a targeted alternative to total knee arthroplasty (TKA) for knee joint diseases. PKA preserves healthy compartments, showing advantages for unicompartmental or bicompartmental conditions.

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Area of Science:

  • Orthopedic surgery
  • Biomedical engineering
  • Knee joint biomechanics

Background:

  • Advanced knee osteoarthritis often necessitates total knee arthroplasty (TKA).
  • TKA involves resecting healthy knee compartments, even when disease is localized.
  • Partial knee arthroplasty (PKA) emerged as a joint-preserving alternative.

Purpose of the Study:

  • To review the development and current status of partial knee arthroplasty (PKA).
  • To discuss different PKA types: unicondylar, patellofemoral, and bicompartmental.
  • To summarize patient selection, clinical outcomes, and future directions for PKA.

Main Methods:

  • Literature review of PKA development and advancements.
  • Analysis of clinical outcomes and patient selection criteria for various PKA types.
  • Synthesis of current evidence and future trend identification.

Main Results:

  • PKA has evolved significantly, offering targeted treatment for specific knee compartments.
  • Unicompartmental, patellofemoral, and bicompartmental arthroplasties are established PKA modalities.
  • PKA demonstrates advantages in preserving healthy joint structures compared to TKA.

Conclusions:

  • Partial knee arthroplasty is a refined, effective option for select knee joint diseases.
  • Optimized patient selection and ongoing technological advancements are key to PKA success.
  • Further research should focus on refining PKA techniques and long-term outcomes.