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Related Concept Videos

Functional Classification of Joints01:09

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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.
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Treatment for a fracture is based on the type of break, the bone affected, and the patient's age.
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The bones of the human skeletal system are of varied shapes, sizes, and functions. They can be classified based on their shape and function into four major classes: long bones, short bones, flat bones, and irregular bones. Some classifications include a fifth type, the sesamoid bones, as a separate class, whereas others categorize them under short bones.
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The appendicular skeleton, particularly the upper and lower limbs, is primarily made of long and short bones. The...
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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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The upper limb consists of the arm, forearm, wrist, and hand bones. The humerus is the single bone of the upper arm region. Proximally, it has a large, spherical, smooth head that articulates with the glenoid cavity of the scapula to form the glenohumeral or shoulder joint. The margin of the head is the anatomical neck, a residual epiphyseal plate. Laterally it extends to form bony projections called the greater tubercle and the lesser tubercle. Next to the tubercles is the surgical neck, a...
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Cortical Bone Assessment Using Ultrasonic Guided Waves: A Reproducibility Study in a Healthy Population
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Assessing the Wrightington Classification System for elbow fracture-dislocations : an external reliability study.

Shannon Tse1,2, An-Sofie Van de Kelft1,3, Samuel K Simister2

  • 1Department of Trauma & Orthopaedics, University College Hospital, London, UK.

The Bone & Joint Journal
|January 31, 2025
PubMed
Summary
This summary is machine-generated.

The Wrightington Classification System (WCS) shows moderate reliability for assessing elbow fracture-dislocations, with improved accuracy using 3D CT imaging. This system aids in guiding surgical treatment for complex elbow injuries.

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Area of Science:

  • Orthopaedic Surgery
  • Radiology
  • Trauma Management

Background:

  • Complex elbow fracture-dislocations present challenges in management, often leading to poor outcomes.
  • Accurate classification systems are crucial for effective treatment and reducing complications.
  • The Wrightington Classification System (WCS) integrates bony and soft-tissue injury assessment for elbow fracture-dislocations.

Purpose of the Study:

  • To externally validate the reliability of the Wrightington Classification System (WCS) for elbow fracture-dislocations.
  • To assess interobserver and intraobserver reliability of the WCS across different imaging modalities.
  • To determine the optimal imaging technique for utilizing the WCS.

Main Methods:

  • A blinded study involving 73 patients with elbow fracture-dislocations.
  • Five assessors independently classified injuries using the WCS on plain radiographs, 2D CT, and 2D/3D CT reconstructions.
  • Interobserver and intraobserver reliability were assessed using kappa statistics over two separate evaluations.

Main Results:

  • Moderate interobserver reliability was observed across all imaging methods (mean kappa 0.518-0.582).
  • Substantial intraobserver agreement was found, with higher kappa values for CT-based imaging (mean kappa 0.695-0.777).
  • Combined 2D and 3D CT imaging demonstrated the highest reliability for WCS application.

Conclusions:

  • The Wrightington Classification System (WCS) is a reliable tool for characterizing elbow fracture-dislocations.
  • The WCS demonstrates moderate reliability, which is enhanced with advanced CT imaging techniques.
  • Refinements in classifying specific coronoid and facet injuries within the WCS could further improve its reproducibility.