Biomechanical reevaluation of orthodontic asymmetric headgear.

ABSTRACT:

Objective

To investigate the distribution of distal and lateral forces produced by orthodontic asymmetric headgear (AHG) using mathematical models to assess periodontal ligament (PDL) influence and to attempt to resolve apparent inconsistencies in the literature.

Materials and methods

Mechanical models for AHG were constructed to calculate AHG force magnitudes and direction using the theory of elasticity. The PDL was simulated by elastic springs attached to the inner-bow terminals of the AHG. The total storage energy (E(t)) of the AHG and the supporting springs was integrated to evaluate the distal and lateral forces produced by minimizing E(t) (Castigliano's theorem). All analytical solutions were derived symbolically.

Results

The spring-supported headgear model (SSH

SUBMITTER: Chi L 

PROVIDER: S-EPMC8845545 | biostudies-literature | 2012 Jul

REPOSITORIES: biostudies-literature