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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 Joints: Cartilaginous Joints01:17

Structural Joints: Cartilaginous Joints

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As the name indicates, at a cartilaginous joint, the adjacent bones are united by cartilage, a tough but flexible type of connective tissue. Unlike synovial joints, these types of joints lack a joint cavity and involve bones joined together by either hyaline cartilage or fibrocartilage.
There are two types of cartilaginous joints:
Synchondrosis
A synchondrosis ("joined by cartilage") is a cartilaginous joint where bones are connected by hyaline cartilage. Synchondrosis may be temporary...
3.6K
Structural Joints: Synovial Joints01:16

Structural Joints: Synovial Joints

6.0K
Synovial joints are the most common type of joint in the body. A key structural characteristic for a synovial joint is the presence of a joint cavity. This fluid-filled space is where the articulating surfaces of the bones contact each other. Also, unlike fibrous or cartilaginous joints, the articulating bone surfaces at a synovial joint are not directly connected to each other with fibrous connective tissue or cartilage. This gives the bones of a synovial joint the ability to move smoothly...
6.0K
Knee Joint01:23

Knee Joint

2.9K
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...
2.9K
Joints01:26

Joints

35.2K
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...
35.2K
Structural Classification of Joints01:20

Structural Classification of Joints

6.7K
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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Related Experiment Video

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A Reproducible Cartilage Impact Model to Generate Post-Traumatic Osteoarthritis in the Rabbit
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[Pseudarthroses].

Marcus Jäger1,2, Dennis Wassenaar3, André Busch3

  • 1Klinik für Orthopädie, Unfall- und Wiederherstellungschirurgie, St. Marien-Hospital Mülheim an der Ruhr GmbH (Contilia), Kaiserstr. 50, 45468, Mülheim/Ruhr, Deutschland. marcus.jaeger@uni-due.de.

Der Orthopade
|May 14, 2020
PubMed
Summary
This summary is machine-generated.

Bone nonunion (pseudarthrosis) occurs when fractures or osteotomies fail to heal within six months. Treatment planning for nonunion depends on its type, severity, and patient factors.

Keywords:
Bone healingImplant failureInfectionOsteosynthesisTrauma

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Area of Science:

  • Orthopedic Surgery
  • Biomaterials Science
  • Regenerative Medicine

Background:

  • Bone fractures and osteotomies involve structural bone discontinuity and gap formation.
  • Failure to achieve osseous bridging within six months results in nonunion (pseudarthrosis).
  • Nonunion is a critical condition where spontaneous healing is unlikely without intervention.

Purpose of the Study:

  • To outline the classification and crucial factors influencing treatment planning for bone nonunion.
  • To detail the principles of operative and nonoperative management strategies for pseudarthrosis.
  • To emphasize the importance of risk profile minimization and patient compliance in successful treatment outcomes.

Main Methods:

  • Classification of pseudarthrosis into hypertrophic and atrophic types.
  • Assessment of aseptic vs. septic conditions, defect size, blood supply, and mechanical stability.
  • Utilizing scoring systems for pseudarthrosis type and comorbidities to guide treatment selection.

Main Results:

  • Nonunion requires intervention as spontaneous healing is improbable.
  • Treatment strategies are tailored based on pseudarthrosis classification and patient-specific factors.
  • Operative principles focus on bone vitalization, stabilization, and infection control.

Conclusions:

  • Successful nonunion treatment hinges on addressing the specific type of pseudarthrosis and comorbidities.
  • Minimizing individual risk profiles and ensuring patient compliance are fundamental to treatment success.
  • A multidisciplinary approach considering biological, mechanical, and patient factors is essential for optimal outcomes.