Evaluation of pharyngeal airway space changes after bimaxillary orthognathic surgery with a 3-dimensional simulation and modeling program.

Introduction: The aims of this study were to use 3-dimensional simulation and modeling programs to evaluate the effects of bimaxillary orthognathic surgical correction of Class III malocclusions on pharyngeal airway space volume, and to compare them with the changes in obstructive sleep apnea measurements from polysomnography.

Methods: Twenty-five male patients (mean age, 21.6 years) with mandibular prognathism were treated with bilateral sagittal split osteotomy and LeFort I advancement.

Measurement accuracy of a computer-assisted three-dimensional analysis and a conventional two-dimensional method.

Objective: To determine the differences between manual and cephalometric measurements on different sections of the human skull, which were obtained using computer-assisted three-dimensional (3D) analysis and conventional two-dimensional (2D) techniques.

Materials And Methods: Measurements were carried out on 13 dry human skulls, then 2D cephalograms and 3D computed tomographic (CT) images were obtained. Anatomic landmarks were determined and marked with clay before CT images were taken, and the same landmarks were marked with the help of metallic balls and pins for lateral and frontal cephalograms.

Anterior segmental distraction of the hypoplastic maxilla by a tooth borne device: a study on the movement of the segment.

The aim of this study is to determine the relative movement of the teeth and bone after premaxillary distraction with a tooth-borne device constructed in the authors' centre. To evaluate the effects of this device on the anterior segment and teeth, the space formed between the anterior and posterior segments of the maxilla was measured on computerized tomography images from 10 patients. The average differences were 3.

Effects of hyperbaric oxygen during experimental tooth movement.

Objective: To determine the effects of hyperbaric oxygen (HBO) on bone remodeling during orthodontic tooth movement.

Materials And Methods: Twenty-four male, adult Sprague Dawley rats were randomly divided into two groups. HBO was administered in the first group, and the second group served as a control.

A unique treatment of finger-sucking habit in children with mental retardation: report of 2 cases.

Finger-sucking habit, or nonnutritive sucking, usually ceases spontaneously in childhood. If the habit is not broken, however, not only will dental occlusion be affected, but the shape of the finger may be altered as well. When the habit is broken, the threatening disturbances of digital growth and dental occlusion will resolve spontaneously.