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Related Concept Videos

Bones of the Upper Limb: Humerus01:19

Bones of the Upper Limb: Humerus

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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...
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Bones of the Upper Limb: Ulna01:15

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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...
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Related Experiment Video

Updated: Mar 21, 2026

Reverse Total Shoulder Arthroplasty
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Intramedullary humeral replacement: an evolving design.

Ali Abdullah Mohammed1, Simon Peter Frostick1

  • 1Royal Liverpool University Hospital Liverpool L69 3GA UK.

SICOT-J
|May 11, 2016
PubMed
Summary

This study presents an evolving implant design for complex shoulder and elbow revisions, avoiding extensive bone resection. The new approach preserves bone stock and soft tissues, reducing surgical invasiveness.

Keywords:
Elbow replacementEndo-prosthetic replacementHumeral replacementMegaprosthesisShoulder replacement

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Related Experiment Videos

Last Updated: Mar 21, 2026

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Area of Science:

  • Orthopedic surgery
  • Biomedical engineering
  • Reconstructive surgery

Background:

  • Total humeral replacement is standard for tumor resection but involves significant bone resection in non-oncological complex revisions.
  • Existing tumor prosthesis implants can lead to avoidable bone resection and tissue damage in revision cases.

Purpose of the Study:

  • To describe an evolving implant design for complex, non-oncological shoulder and elbow revisions.
  • To avoid total humeral resection and preserve bone stock and surrounding tissues.

Main Methods:

  • Three cases of simultaneous shoulder and elbow replacement were performed over 42 months.
  • A custom-made intramedullary linkage connected shoulder and elbow prostheses.
  • Implant design evolved to a smaller component for Intramedullary Humeral Replacement (IMHR), maximizing bone and soft tissue preservation.

Main Results:

  • No neurovascular complications were reported in any of the three cases.
  • No further revisions were required for the humeral replacement, shoulder, or elbow components.

Conclusions:

  • The evolving design successfully preserved patient anatomy, reducing surgical impact and invasiveness.
  • This approach minimizes bone resection and sacrifice of soft tissue attachments in complex revision surgeries.