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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...
4.0K
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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Method of Joints01:30

Method of Joints

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The method of joints is a commonly used technique to analyze the forces in structural trusses. The method is based on the principle of equilibrium, which assumes that the truss members are connected by frictionless pins. The forces at each joint can be determined by considering the equilibrium of the forces acting on that joint.
Since plane truss members are in the same plane, each joint is subjected to a coplanar and concurrent force system. To apply the method of joints, the first step is to...
1.3K
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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Distal Radioulnar Joint Replacement in the Scarred Wrist.

Jonathan Lans1, Shih-Heng Chen2, Jesse B Jupiter1

  • 1Department of Orthopaedic Surgery, Hand and Upper Extremity Service, Massachusetts General Hospital, Harvard Medical School, Yawkey Center, Boston, Massachusetts.

Journal of Wrist Surgery
|February 7, 2019
PubMed
Summary

Total wrist arthrodesis combined with distal radioulnar joint (DRUJ) replacement effectively improved wrist function and reduced pain in patients with multiple prior surgeries. Despite challenges, this approach offers significant functional gains for complex wrist arthritis cases.

Keywords:
distal radioulnar joint arthritisdistal radioulnar joint replacementmidcarpal arthritisradiocarpal arthritiswrist arthrodesis

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Area of Science:

  • Orthopedic Surgery
  • Hand and Wrist Surgery
  • Reconstructive Surgery

Background:

  • Concurrent radiocarpal/midcarpal and distal radioulnar joint (DRUJ) arthritis impairs wrist function.
  • Treatment options include wrist arthroplasty/arthrodesis with DRUJ procedures.
  • Outcomes of DRUJ replacement after multiple prior wrist surgeries are not well-documented.

Purpose of the Study:

  • To evaluate the outcomes of total wrist arthrodesis and DRUJ replacement in patients with a history of multiple wrist surgeries.
  • To assess functional improvements and complications in this challenging patient cohort.

Main Methods:

  • Prospective enrollment of 14 patients (median age 43) undergoing total wrist arthrodesis and DRUJ replacement (1999-2012).
  • Objective measures included range of motion, weight-bearing ability, and grip strength.
  • Subjective measures included pain scores and Disabilities of the Arm Shoulder and Hand (DASH) scores.

Main Results:

  • Significant improvements observed in DRUJ range of motion and weight-lifting ability at a median 5.6-year follow-up.
  • Postoperative pain scores and DASH scores showed significant improvement.
  • Complications included infection, heterotopic ossification (2 reoperations), and pisotriquetral arthritis (5 patients).

Conclusions:

  • Distal radioulnar joint replacement with a semiconstrained prosthesis is effective for restoring wrist and forearm function.
  • Compromised surgical anatomy in these patients necessitates additional exposure, increasing complexity.
  • No radiographic loosening was observed.