Guided tissue regeneration and orthodontic movement for the treatment of pathological migration in esthetic zone.

Pathological migration is one of the chief complaints of patients-seeking dental treatment. It results in difficulty in mastication, speech, poor esthetic appearance, and decreased self-confidence. The prevalence ranges from 21.

Three-dimensional upper airway changes with mandibular advancement device in patients with obstructive sleep apnea.

Introduction: A mandibular advancement device effectively increases upper airway size in patients with obstructive sleep apnea. Three-dimensional volumetric upper airway changes, exact amounts of change in obstructed upper airways (smallest cross-sectional area), and anteroposterior and transverse changes with mandibular advancement devices are not clear.

Methods: Thirty-seven patients with obstructive sleep apnea diagnosed with polysomnography were evaluated with the subjective Epworth sleepiness scale, percentage of oxygen saturation, and cone-beam computed tomography.

Stress distribution analysis during an intermaxillary dysjunction: A 3-D FEM study of an adult human skull.

Background: With the increased interest in adult orthodontics, maxillary width problems in the nongrowing patients have been encountered with greater frequency. In view of the negative outlook for successful nonsurgical palatal expansion in adult patients it seemed appropriate to evaluate the biomechanical effects of nonsurgical rapid maxillary expansion (RME) in adults using the finite element method (FEM).

Objectives: To evaluate the biomechanical effects of RME on the craniofacial complex as applied to three-dimensional (3D) model of an adult human skull using the finite element method.