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Related Concept Videos

Structural Joints: Synovial Joints01:16

Structural Joints: Synovial Joints

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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...
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Structural Joints: Fibrous Joints01:03

Structural Joints: Fibrous Joints

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Fibrous joints are a type of joint where the bones are connected by fibrous connective tissue. These joints provide stability and minimal to no movement between the articulating bones. There are three types of fibrous joints.
Suture
All the bones of the skull, except for the mandible, are joined to each other by a fibrous joint called a suture. The fibrous connective tissue found at a suture strongly unites the adjacent skull bones and thus helps to protect the brain and form the face. In...
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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...
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Joints01:26

Joints

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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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Oxidation-Reduction Reactions03:11

Oxidation-Reduction Reactions

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Oxidation–Reduction Reactions
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Introduction to Joints00:58

Introduction to Joints

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The adult human body usually has 206 bones, and except for the hyoid bone in the neck, each bone is connected to at least one other bone. Joints are the location where bones come together. Many joints allow for movement between the bones. At these joints, the articulating surfaces of the adjacent bones can move smoothly against each other. However, the bones of other joints may be joined by connective tissue or cartilage. These joints are designed for stability and provide little or no...
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Related Experiment Video

Updated: Jan 27, 2026

Theoretical Calculation and Experimental Verification for Dislocation Reduction in Germanium Epitaxial Layers with Semicylindrical Voids on Silicon
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Theoretical Calculation and Experimental Verification for Dislocation Reduction in Germanium Epitaxial Layers with Semicylindrical Voids on Silicon

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Isolated first carpometacarpal joint dislocation managed with closed reduction and splinting.

Amanda Mun Yee Slocum1, Tun Hing Lui2

  • 1Department of Orthopaedics and Traumatology, North District Hospital, Hong Kong, Hong Kong.

BMJ Case Reports
|April 3, 2019
PubMed
Summary

Non-operative management, including splinting, is effective for stable first carpometacarpal joint dislocations. This approach led to full recovery and no long-term issues in a patient with thumb joint dislocation.

Keywords:
orthopaedic and trauma surgeryorthopaedics

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Last Updated: Jan 27, 2026

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Area of Science:

  • Orthopedic Surgery
  • Traumatology
  • Hand Surgery

Background:

  • First carpometacarpal (CMC) joint dislocations are relatively uncommon hand injuries.
  • Traumatic injuries to the CMC joint can lead to significant pain, swelling, and functional impairment.

Observation:

  • A 56-year-old right-hand-dominant office worker sustained a dorsal dislocation of the first CMC joint after a forceful hand movement.
  • Initial presentation included pain and swelling at the base of the thumb.
  • Radiographs confirmed dorsal dislocation of the first CMC joint.

Findings:

  • Closed reduction of the dislocated CMC joint was successfully performed.
  • Post-reduction, the joint demonstrated clinical stability and radiographic congruence.
  • The joint was immobilized using a thumb spica splint for six weeks.
  • The patient experienced complete pain resolution and regained full range of motion by nine weeks post-injury.
  • At two-year follow-up, the patient remained asymptomatic with normal radiographic findings, showing no subluxation or osteoarthritis.

Implications:

  • Non-operative management, specifically splinting, is a viable and effective treatment option for stable first CMC joint dislocations.
  • Successful non-operative treatment can lead to excellent long-term functional outcomes and prevent chronic joint issues.
  • This case highlights the importance of assessing joint stability post-reduction to guide treatment decisions for CMC joint injuries.