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Related Concept Videos

Plastic Deformations01:19

Plastic Deformations

444
Plastic deformation represents a fundamental concept in materials science, which explains the irreversible change in the shape of a material when it experiences stress beyond its elastic capability. This phenomenon is important in structural engineering, especially in designing and analyzing cantilever beams—structures that are securely fixed at one end and bear loads at the opposite end. When these beams are subjected to loads within their elastic range, they will return to their...
444
Plastic Deformations01:14

Plastic Deformations

412
It is essential to understand how structural members behave under plastic deformation when the bending stress exceeds the material's yield strength. This state of deformation permanently alters the shape of the member, in contrast to the linear elastic behavior observed before yielding. The strain at any point in the member is expressed in terms of maximum strain. Notably, the neutral axis, which coincides with the centroid during elastic bending, shifts away from the centroid under plastic...
412
Temperature Dependent Deformation01:12

Temperature Dependent Deformation

377
In a nonhomogeneous rod made up of steel and brass, restrained at both ends and subjected to a temperature change, several steps are involved in calculating the stress and compressive load. Due to the problem's static indeterminacy, one end support is disconnected, allowing the rod to experience the temperature change freely. Next, an unknown force is applied at the free end, triggering deformations in the rod's steel and brass portions. These deformations are then calculated and added...
377
Deformations in a Symmetric Member in Bending01:18

Deformations in a Symmetric Member in Bending

485
When analyzing the deformation of a symmetric prismatic member subjected to bending by equal and opposite couples, it becomes clear that as the member bends, the originally straight lines on its wider faces curve into circular arcs, with a constant radius centered at a point known as Point C. This phenomenon helps to understand the stress and strain distribution within the member more clearly.
When the member is segmented into tiny cubic elements, it is observed that the primary stress...
485
Deformation of Member under Multiple Loadings01:11

Deformation of Member under Multiple Loadings

457
When a rod is made of different materials or has various cross-sections, it must be divided into parts that meet the necessary conditions for determining the deformation. These parts are each characterized by their internal force, cross-sectional area, length, and modulus of elasticity. These parameters are then used to compute the deformation of the entire rod.
In the case of a member with a variable cross-section, the strain is not constant but depends on the position. The deformation of an...
457
Deformation in a Circular Shaft01:10

Deformation in a Circular Shaft

882
One of the distinctive characteristics of circular shafts is their ability to maintain their cross-sectional integrity under torsion. In other words, each cross-section continues to exist as a flat, unaltered entity, simply rotating like a solid, rigid slab. To understand the distribution of shearing stress within such a shaft, consider a cylindrical section inside this circular shaft. This section has a length of L and a radius of R, with one end fixed. The radius of the cylindrical section is...
882

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Updates in Pediatric Cavovarus Deformity.

Kai Ziebarth1, Fabian Krause2

  • 1Department of Pediatric Surgery, Inselspital, University of Berne, Freiburgstrasse, 3010 Berne, Switzerland.

Foot and Ankle Clinics
|May 1, 2019
PubMed
Summary
This summary is machine-generated.

Pediatric cavovarus deformities require treatment to improve foot function and prevent arthritis. Selecting the right surgical procedure is key to successful outcomes, avoiding recurrence or failure.

Keywords:
Cavovarus deformityNonoperativeOperativePediatricTreatmentUpdate

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Area of Science:

  • Orthopedic surgery
  • Pediatric orthopedics
  • Foot and ankle deformities

Background:

  • Pediatric cavovarus deformities present challenges in treatment.
  • Goals include normalizing plantar pressure, correcting hindfoot varus, and preventing arthritis.
  • Nonoperative management may be insufficient, necessitating surgical intervention.

Purpose of the Study:

  • To review current treatment options for pediatric cavovarus deformities.
  • To correlate treatment strategies with the localization of anatomic pathology.
  • To present outcomes of both nonoperative and operative interventions.

Main Methods:

  • Literature review of current treatment options for pediatric cavovarus deformities.
  • Analysis of nonoperative and operative treatment outcomes.
  • Focus on decision-making and surgical technique advancements.

Main Results:

  • Successful treatment neutralizes plantar pressure and reduces hindfoot deformity.
  • Appropriate surgical procedure selection is critical for success.
  • Recurrence and failure can occur if operative procedures are not carefully chosen.

Conclusions:

  • Treatment for pediatric cavovarus deformities aims to optimize foot function and long-term joint health.
  • Careful patient selection and procedural choice are paramount for surgical success.
  • Understanding pathology localization guides the selection of effective interventions.