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Related Concept Videos

Functional Classification of Joints01:09

Functional Classification of Joints

8.9K
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.
A fibrous joint is where the adjacent bones are united by fibrous connective...
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Joints01:26

Joints

36.4K
Joints, also called articulations or articular surfaces, are points at which ligaments or other tissues connect adjacent bones. Joints permit movement and stability, and can be classified based on their structure or function.
Structural joint classifications are based on the material that makes up the joint as well as whether or not the joint contains a space between the bones. Joints are structurally classified as fibrous, cartilaginous, or synovial.
Fibrous Joints Are Immovable
The bones of a...
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Knee Joint01:23

Knee Joint

3.7K
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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Related Experiment Video

Updated: Mar 21, 2026

Biotribological Testing and Analysis of Articular Cartilage Sliding against Metal for Implants
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[Progress on classification and application of artificial hip joint materials].

Xiao Wu, Ben-xiang He, Ya-jun Tan

    Zhongguo Gu Shang = China Journal of Orthopaedics and Traumatology
    |May 7, 2016
    PubMed
    Summary

    Choosing the right prosthetic material is crucial for hip arthroplasty success. Polymer composites show promise due to their biocompatibility and mechanical properties, despite needing improvements in abrasion resistance.

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    Area of Science:

    • Biomaterials Science
    • Orthopedic Surgery
    • Materials Engineering

    Background:

    • The success of hip arthroplasty hinges on prosthetic material selection.
    • Current materials (metals, ceramics, polymers, carbon) show progress but fall short of ideal design standards.
    • Biocompatibility, mechanical properties, and longevity are key considerations for artificial hip joint materials.

    Purpose of the Study:

    • To review the characteristics and applications of current artificial hip joint materials.
    • To provide a reference for selecting appropriate hip joint materials in clinical practice.
    • To guide the enhancement of material properties for improved hip arthroplasty outcomes.

    Main Methods:

    • Classification of existing prosthetic materials for artificial hip joints.
    • Analysis of the advantages and disadvantages of each material category.
    • Evaluation of polymer composites as a promising material for hip arthroplasty.

    Main Results:

    • Metals, ceramics, polymer composites, and carbon materials are primary prosthetic options.
    • Polymer composites exhibit superior biocompatibility, mechanical strength, corrosion resistance, and cost-effectiveness.
    • Abrasion resistance remains a limitation for polymer composites, though research is actively addressing this.

    Conclusions:

    • Polymer composites offer significant advantages for hip arthroplasty, with ongoing research focused on improving wear resistance and articular surface properties.
    • Continued advancements in polymer composites suggest a wide future prospect for enhanced artificial hip joint performance.
    • Material selection critically impacts hip arthroplasty outcomes, necessitating a thorough understanding of material characteristics.