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Related Concept Videos

Muscles that Move the Forearm01:16

Muscles that Move the Forearm

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The muscles that move the forearms can be divided into four groups: forearm flexors, forearm extensors, forearm pronators, and forearm supinators. The flexors and extensors act on the elbow joint, while the pronators and supinators act on the radioulnar joints.
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The biceps brachii, brachialis, and brachioradialis are forearm flexors. The biceps brachii is made up of two heads. Its long head originates at the supraglenoid tubercle of the scapula, whereas that of the short head is...
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Lumber defects, which can affect both the appearance and structural integrity of wood, include a variety of growth and manufacturing flaws. Growth defects such as knots and knotholes occur where branches were once attached to the tree trunk, with knotholes forming when these knots fall out. Other natural defects include decay and insect damage, which compromise the wood's strength and durability.
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Signal processing techniques are essential for accurately converting continuous signals to digital formats and vice versa. When a continuous signal is sampled with a period T, the resulting sampled signal exhibits replicas of the original spectrum in the frequency domain, spaced at intervals equal to the sampling frequency. To handle this sampled signal, a zero-order hold method can be applied, which creates a piecewise constant signal by retaining each sample's value until the next...
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Within the skeletal system, the structure of a bone, or osseous tissue, can be exemplified in a long bone, like the femur, where there are two types of osseous tissue: cortical and cancellous.
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Bone remodeling is a continuous and balanced process of bone resorption by osteoclasts and bone formation by osteoblasts. In adults, it helps maintain bone mass and calcium homeostasis. While mechanical stress can stimulate turnover as part of the normal maintenance and reparative process, several hormones also regulate bone remodeling.
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Related Experiment Video

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Coronoid-Temporalis Pedicled Flap for Orbital Floor Defect Reconstruction
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Masquelet Reconstruction for Posttraumatic Segmental Bone Defects in the Forearm.

Matthew Walker1, Behnam Sharareh1, Scott A Mitchell1

  • 1Department of Orthopedic Surgery, Baylor College of Medicine, Houston, TX.

The Journal of Hand Surgery
|August 28, 2018
PubMed
Summary
This summary is machine-generated.

The Masquelet technique successfully reconstructs forearm bone defects from trauma or nonunion. This staged procedure, involving a spacer and delayed bone grafting, achieved union in all patients with minimal complications.

Keywords:
Atrophic nonunionMasquelet techniqueinfectious nonunionopen fracturestraumatic bone loss

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Area of Science:

  • Orthopedic surgery
  • Bone defect reconstruction
  • Trauma surgery

Background:

  • Segmental bone defects in the forearm present significant reconstructive challenges.
  • The Masquelet technique offers a staged approach to bone defect management.
  • This study focuses on forearm reconstruction using the Masquelet technique.

Purpose of the Study:

  • To evaluate the efficacy of the Masquelet technique for forearm segmental bone defect reconstruction.
  • To assess union rates and complications in forearm reconstruction using this method.
  • To summarize the experience of a level-1 trauma center with the Masquelet technique.

Main Methods:

  • Retrospective review of 9 patients treated with the Masquelet technique for forearm bone defects (2014-2017).
  • Inclusion criteria: acute trauma or nonunion (infected or non-infected).
  • Assessment of bone union and treatment-related complications.

Main Results:

  • All 9 patients achieved bone union, with the median defect size being 4.7 cm.
  • Bone defects resulted from acute open fractures (5 patients) and nonunion (4 patients).
  • Reconstruction utilized autograft (femur or iliac crest); one patient required reoperation for plate fracture.

Conclusions:

  • The Masquelet technique is an effective method for reconstructing traumatic and posttraumatic forearm segmental bone defects.
  • The technique demonstrates a low incidence of complications in forearm reconstruction.
  • Successful bone union was achieved in all treated cases.