Helmet Treatment of Infants With Deformational Brachycephaly

Kevin M Kelly1, Edward F Joganic2, Stephen P Beals3

  • 1University of Iowa, Iowa City, IA, USA.

Global Pediatric Health
|October 24, 2018
PubMed

Insights

Cranial orthosis effectively treats deformational brachycephaly in infants, improving skull shape. Younger infants show better outcomes and shorter treatment durations when using this method for positional plagiocephaly.

Area of Science:

  • Pediatric Medicine
  • Craniofacial Abnormalities
  • Biomechanical Engineering

Background:

  • Infant cranial deformities range from asymmetric plagiocephaly to symmetric brachycephaly.
  • Deformational brachycephaly is often underestimated and incorrectly believed untreatable with orthoses.
  • A spectrum of deformational plagiocephaly-brachycephaly exists, with isolated forms at the extremes.

Purpose of the Study:

  • To evaluate the efficacy of cranial orthosis in treating isolated deformational brachycephaly.
  • To assess the impact of infant age at treatment initiation on outcomes.
  • To challenge the notion that brachycephaly is untreatable with orthotic interventions.

Main Methods:

  • Prospective study of 4205 infants with isolated deformational brachycephaly.
  • Treatment involved custom cranial orthosis.
  • Cephalic index was measured to quantify skull shape changes.

Main Results:

  • Cranial orthosis achieved an 81.4% improvement in cephalic index towards normal values (95.0 to 89.4).
  • Younger infants demonstrated significantly better treatment outcomes.
  • Earlier treatment initiation correlated with shorter treatment durations.

Conclusions:

  • Cranial orthosis is a successful treatment for isolated deformational brachycephaly.
  • Early intervention in younger infants optimizes treatment results and efficiency.
  • This study supports the use of orthoses for brachycephaly, correcting previous misconceptions.

Related Concept Videos

Plastic Deformations01:19

Plastic Deformations

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...
465
Plastic Deformations01:14

Plastic Deformations

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...
444
Temperature Dependent Deformation01:12

Temperature Dependent Deformation

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...
401
Deformations in a Symmetric Member in Bending01:18

Deformations in a Symmetric Member in Bending

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...
521
Deformation of Member under Multiple Loadings01:11

Deformation of Member under Multiple Loadings

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...
476
Deformation in a Circular Shaft01:10

Deformation in a Circular Shaft

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...
924