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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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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...
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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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The muscles of the forearm that move the wrist, hand, and digits are numerous and diverse. They can be classified into two groups based on their location and function — the anterior and posterior compartment muscles.
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Nine muscles are involved in arm movements. Two of these, the pectoralis major and latissimus dorsi, originate from the axial skeleton and are called axial muscles. The other seven originate from the scapula and are called the scapular muscles.
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A toggle clamp is a mechanical device commonly used for holding and clamping objects in various applications, such as woodworking, metalworking, and assembly operations. Consider a toggle clamp subjected to a force of 200 N at the handle. The vertical clamping force can be calculated, provided the dimensions of the toggle clamp are known.
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Dual Construct Fixation of the Scaphoid.

Brahman Shankar Sivakumar1, Richard Dorrien Lawson1, Vincent V G An2

  • 1Department of Hand & Peripheral Nerve Surgery, Royal North Shore Hospital, St Leonards, NSW, Australia.

The Journal of Hand Surgery Asian-Pacific Volume
|October 31, 2023
PubMed
Summary

Dual construct fixation, using a screw-plate, is effective for complex wrist fractures. This method aids healing in challenging cases, offering a viable option for difficult scaphoid fracture treatments.

Keywords:
Case reportDual constructFracturePlateScaphoidScrew

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Area of Science:

  • Orthopedic Surgery
  • Traumatology
  • Hand Surgery

Background:

  • Dual construct fixation is a recognized technique for complex fractures.
  • Its application in specific scenarios like peri-articular, peri-prosthetic, poor bone quality, and revision cases is established.
  • The scaphoid bone, particularly its distal pole, presents unique challenges in fracture management.

Purpose of the Study:

  • To describe the use of a screw-plate construct for a juxta-articular distal pole scaphoid fracture.
  • To review existing literature on dual construct fixation in similar fracture patterns.
  • To provide evidence-based recommendations for the application of this technique in scaphoid fractures.

Main Methods:

  • Case report detailing the surgical technique for a distal pole scaphoid fracture using a screw-plate construct.
  • Comprehensive literature review of dual construct fixation in peri-articular and scaphoid fractures.
  • Analysis of outcomes and complications based on case and literature data.

Main Results:

  • Successful utilization of a screw-plate construct in a challenging distal pole scaphoid fracture.
  • Literature review indicates potential benefits of dual construct fixation in complex scenarios.
  • Identification of key factors influencing the success of screw-plate fixation in scaphoid fractures.

Conclusions:

  • Screw-plate dual construct fixation is a feasible and potentially effective treatment for juxta-articular distal pole scaphoid fractures.
  • This technique may offer advantages in cases with poor bone stock or complex fracture patterns.
  • Further research is warranted to establish definitive guidelines and long-term outcomes for this specific application.