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Related Concept Videos

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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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.
Synarthrosis
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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.
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Updated: Oct 24, 2025

Destabilization of the Medial Meniscus and Cartilage Scratch Murine Model of Accelerated Osteoarthritis
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Meniscal Injuries: Mechanism and Classification.

Matthew E Wells1,2, John P Scanaliato1,2, John C Dunn1,3

  • 1William Beaumont Army Medical Center.

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|August 16, 2021
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Summary

Meniscal repair offers better outcomes than partial meniscectomy for knee injuries. Understanding tear characteristics is crucial for successful surgical treatment and improved patient results.

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Area of Science:

  • Orthopedic surgery
  • Sports medicine
  • Biomedical engineering

Background:

  • Meniscal tears are common knee injuries.
  • Treatment options include conservative management and surgery.
  • Meniscal repair shows better long-term outcomes than partial meniscectomy.

Purpose of the Study:

  • To compare meniscal repair with partial meniscectomy.
  • To highlight advancements in meniscal repair techniques.
  • To emphasize the importance of understanding tear characteristics for treatment selection.

Main Methods:

  • Review of current literature on meniscal tear management.
  • Analysis of functional outcomes and degenerative changes after repair versus resection.
  • Discussion of surgical innovations and biological enhancements.

Main Results:

  • Meniscal repair demonstrates superior functional outcomes.
  • Partial meniscectomy is associated with more severe long-term degenerative changes.
  • Surgical advances enhance meniscal repair healing rates.

Conclusions:

  • Meniscal repair is the preferred surgical option for suitable tears.
  • Surgeons must understand meniscal vascularity and biomechanics for optimal treatment.
  • Informed treatment decisions improve patient outcomes and reduce revision rates.