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Related Concept Videos

Classification of Bones01:18

Classification of Bones

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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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Structural Classification of Joints01:20

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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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Functional Classification of Joints
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Anterior Cruciate Ligament Transection and Synovial Fluid Lavage in a Rodent Model to Study Joint Inflammation and Posttraumatic Osteoarthritis
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Comprehensive classification system for multirod constructs across three-column osteotomies: a reliability study.

Mostafa H El Dafrawy1, Owoicho Adogwa2, Adam M Wegner3

  • 11Department of Orthopedic Surgery and Rehabilitation Medicine, University of Chicago Medicine & Biological Sciences, Chicago, Illinois.

Journal of Neurosurgery. Spine
|October 9, 2020
PubMed
Summary
This summary is machine-generated.

A new classification system for multirod constructs (MRCs) in three-column osteotomies (3COs) demonstrates good intra- and interobserver reliability. This system standardizes the description of complex spinal rod configurations, improving consistency in surgical documentation.

Keywords:
adult spinal deformityclassification systemmultirod constructsrod configurationspinal instrumentationspine constructthree-column osteotomy

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Area of Science:

  • Spine surgery
  • Orthopedic surgery
  • Surgical instrumentation

Background:

  • Multirod constructs (MRCs) are frequently used in three-column osteotomies (3COs) for spinal stabilization.
  • Existing literature lacks a standardized classification system for describing the diverse rod configurations in MRCs across 3COs.
  • This variability in description can lead to ambiguity in surgical planning and communication.

Purpose of the Study:

  • To determine the intra- and interobserver reliability of a novel classification system for MRCs in 3COs.
  • To establish a standardized method for describing rod configurations and density in complex spinal constructs.
  • To assess the system's utility in improving consistency among spinal surgeons.

Main Methods:

  • Two spinal surgery fellows classified 35 patient MRCs across 3COs using the new system.
  • Classification involved detailed descriptions of rod number, configuration (main, linked, satellite, accessory, intercalary), and density.
  • The fellows reclassified the same constructs two weeks later to assess intraobserver reliability, and their classifications were compared for interobserver reliability.

Main Results:

  • The intrarater kappa coefficient was 0.63, indicating good reliability.
  • The interrater kappa coefficient was 0.3, suggesting a lower degree of agreement between observers.
  • Despite the lower interrater kappa, there was a high degree of agreement, with 34/35 and 33/35 correct observations, and misclassifications often related to distinguishing anchors from connectors.

Conclusions:

  • The developed MRC classification system demonstrates good intra- and interobserver reliability for describing rod configurations in 3COs.
  • The system provides a comprehensive and standardized approach to documenting complex spinal constructs.
  • Implementation of this classification can enhance clarity and consistency in surgical reporting and research related to 3COs.