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Related Concept Videos

Bones of the Upper Limb: Radius01:09

Bones of the Upper Limb: Radius

The radius is longer of the two bones that make up the human antebrachium or forearm. At the proximal end, the radius articulates with the capitulum of the humerus and the radial notch of the ulna to form the elbow joint. At the distal end, the radius articulates with the ulna via the ulnar notch, forming the distal radioulnar joint. Distally, the radius also attaches to the carpal wrist bones (scaphoid and lunate) to form the radiocarpal joint.
The radius has a nail-shaped head, and a short...
Bones of the Upper Limb: Humerus01:19

Bones of the Upper Limb: Humerus

The upper limb consists of the arm, forearm, wrist, and hand bones. The humerus is the single bone of the upper arm region. Proximally, it has a large, spherical, smooth head that articulates with the glenoid cavity of the scapula to form the glenohumeral or shoulder joint. The margin of the head is the anatomical neck, a residual epiphyseal plate. Laterally it extends to form bony projections called the greater tubercle and the lesser tubercle. Next to the tubercles is the surgical neck, a...
Bones of the Upper Limb: Ulna01:15

Bones of the Upper Limb: Ulna

The ulna and radius are parallel bones of the antebrachium or the forearm. The ulna lies medially and consists of a bony tip called the olecranon process at its proximal end. This hook-like projection articulates with the olecranon fossa of the humerus and forms the "hinged" ulnohumeral part of the elbow joint. This joint facilitates forearm extension and flexion while preventing its hyperextension. Similarly, the coronoid process, another bony projection on the proximal/anterior side of the...
Functional Classification of Joints01:09

Functional Classification of Joints

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 immobile...

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Related Experiment Videos

[Differences in elbow replacement in rheumatoid arthritis].

K Schmidt1, A Hilker, R K Miehlke

  • 1Abteilung für Orthopädie und Rheumatologie, Katholisches Krankenhaus Dortmund-West, Zollernstrasse 40, 44379 Dortmund. k.schmidt@kkhs.kirchlinde.de

Der Orthopade
|July 21, 2007
PubMed
Summary

Total elbow replacement relieved pain and improved function for arthritis patients. Semiconstrained implants showed better survival, with linked components preventing dislocation, making them suitable for severe elbow arthritis.

Related Experiment Videos

Area of Science:

  • Orthopedic Surgery
  • Biomedical Engineering

Background:

  • Rheumatoid arthritis, psoriatic arthritis, and osteoarthrosis can severely affect elbow function.
  • Total elbow arthroplasty is a surgical option for managing advanced elbow joint diseases.

Purpose of the Study:

  • To evaluate the outcomes of various total elbow arthroplasty implants.
  • To compare the complication and revision rates among different prosthesis types.
  • To identify implant characteristics associated with improved survival and function.

Main Methods:

  • Retrospective analysis of 165 patients undergoing total elbow arthroplasty between 1987 and 2005.
  • Utilized various prostheses including semiconstrained (GSB III, Coonrad-Morrey), unconstrained (Souter-Strathclyde), constrained link hinge, custom-made, and Pritchard replacements.
  • Assessed pain relief, functional improvement, complication rates, and revision surgery necessity.

Main Results:

  • All implant procedures resulted in pain relief and improved functionality.
  • Overall complication rate was 34.4%, with 27.2% requiring revision surgery due to infection, dislocation, or aseptic loosening.
  • Semiconstrained implants with flanges demonstrated superior survival rates.
  • Coonrad-Morrey linked implants effectively prevented dislocation without increasing loosening risk.

Conclusions:

  • Semiconstrained implants, particularly those with load-transferring flanges, are recommended for advanced elbow arthritis.
  • Linked component designs, like the Coonrad-Morrey, offer stability against dislocation.
  • Total elbow replacement is associated with significant complications and should be reserved for severely disabled patients.