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Related Concept Videos

Functional Classification of Joints01:09

Functional Classification of Joints

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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...
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Structural Classification of Joints01:20

Structural Classification of Joints

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Joints, also known as articulations, are classified based on their structural characteristics, i.e., based on whether the articulating surfaces of the adjacent bones are directly connected by fibrous connective tissue or cartilage, or whether the articulating surfaces contact each other within a fluid-filled joint cavity. These differences serve to divide the joints of the body into three structural classifications.
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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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Treatment of Ankle Osteoarthritis with Total Ankle Replacement Through a Lateral Transfibular Approach
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Development and Underlying Structure of a Second-Generation Appropriateness Classification System for Total Knee

Antonio Escobar Martinez1, Robert A Perera2, Daniel L Riddle2

  • 1Kronikgune, Baracaldo, Spain, Hospital Universitario Basurto-Health Services and Chronic Diseases Research Network (REDISSEC, Bilbao, Spain.

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Summary

A new total knee arthroplasty (TKA) appropriateness classification system was developed using updated criteria. Age, knee pain, function, and radiographic severity were key indicators for TKA appropriateness.

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Area of Science:

  • Orthopedic surgery
  • Medical decision-making
  • Health services research

Background:

  • The RAND/UCLA appropriateness classification system for total knee arthroplasty (TKA) is over 20 years old.
  • Significant advancements in TKA science and clinical practice necessitate an updated system.
  • The existing system's validity is supported, but its age limits its current applicability.

Purpose of the Study:

  • To describe the development of a second-generation TKA appropriateness classification system.
  • To examine how specific indication criteria influence TKA appropriateness judgments.
  • To create a contemporary system reflecting current TKA knowledge.

Main Methods:

  • An expert panel identified 8 key indication criteria for TKA appropriateness.
  • 1,008 clinical scenarios were constructed based on these criteria.
  • Multivariable regression and classification tree analyses were employed to assess criterion influence.

Main Results:

  • Age, knee pain, function, and radiographic severity were the most influential criteria in predicting TKA appropriateness.
  • Psychological factors, pain catastrophizing, and comorbidities played a lesser role.
  • Classification tree analysis confirmed the dominant impact of the primary criteria.

Conclusions:

  • A second-generation TKA appropriateness classification system was successfully developed.
  • This new system incorporates current indicators of TKA prognosis and risk.
  • Preliminary evidence suggests the utility of this updated system in clinical practice.