[Show abstract][Hide abstract] ABSTRACT: Background and Aim: The aim of this study was to investigate
the morphologic differences of the symphysis among untreated
Class II groups that were segregated according to vertical
type as hypo-, normo- and hyperdivergent and Class I normal
[Show abstract][Hide abstract] ABSTRACT: Aims:
The purpose of this study was to compare pharyngeal airway linear measurements of untreated skeletal Class II subjects with low-, neutral- and high-angle facial patterns and a skeletal Class I control group of postadolescent girls.
We enrolled 50 postadolescent girls in this study. The Class II,1 cohort included subjects presenting ANB angles greater than 4°. Subjects were categorized as belonging to one of three different rotation models: high, neutral and low angles. ANOVA and Duncan's tests were used to identify differences within and among groups (p<0.05).
Pharyngeal airway measurements were significantly smaller (p<0.05) in the high-angle Class II group. In addition, the narrowest linear measurements of the oropharynx (ph-pph) were also smaller in the high-angle Class II group (p=0.055). Soft palate thickness (sp1-sp2) was significantly greater (p<0.05) in the low-angle Class II group.
That smaller airway measurements in only the high-angle Class II subjects were noted confirms an association between pharyngeal airway measurements and a vertical skeletal pattern. However, we could not ascertain that a sagittal jaw relationship had an effect on airway space.
No preview · Article · Jan 2013 · Fortschritte der Kieferorthopädie
[Show abstract][Hide abstract] ABSTRACT: Background
The aim of this study was to determine morphological differences among Class II, division 1 (Class II,1) subjects with different rotation models according to mandibular plane inclination and to compare these with normal subjects.
The study consisted of 132 subjects (99 Class II,1 and 33 Class I control group). The Class II,1 group included subjects who had ANB (point A-nasion-point B) angles greater than 4° with an overjet equal to or greater than 5 mm. Based on the SN/Go-Gn (cranial base anterior length/gonion-gnathion) angle, subjects were divided into three different rotation models as hypodivergent, normodivergent and hyperdivergent. Variance analysis (ANOVA) was used to assess the presence of differences between groups (p < 0.05).
There was no statistical difference among the three groups in Class II,1 malocclusion according to upper face height (N-ANS), total mandibular size (Cd-Pg) and mandibular corpus size (Go-Gn) (p > 0.05). Although the ramus (Cd-Go) was significantly shorter in the Class II,1 hyperdivergent group (p < 0.05), the hypodivergent group had similar ramus heights compared with controls.
Class II groups showed a similar increase in the ANB angle in spite of a different vertical rotation type. This study concludes that future Class II studies should divide subjects into subgroups according to hypodivergent, neutral and hyperdivergent phenotypes.
No preview · Article · Nov 2011 · international journal of stomatology & occlusion medicine
[Show abstract][Hide abstract] ABSTRACT: This case report presents the results of functional and myofunctional treatment of a 9-year, 5-month-old male patient with laterognathy, facial asymmetry and dentofacial deformity. The patient had a history of herpes encephalitis at age 8.5 months and palsy on the left side in early childhood, and his left side remained paralyzed as a sequela. The patient had dentoalveolar asymmetry with a Class I right and Class III left canine relation, a 1.5 mm midline deviation, anterior cross-bite, an overjet of -3 mm and an overbite of 3 mm. The dentoalveolar and facial asymmetries were corrected using a modified removable appliance, with an acrylic vestibular shield inserted on the right side to guide the mandible in the upper arch and an acrylic plate with artificial teeth in the lower arch. The patient was instructed to practice myofunctional exercises regularly. In total, treatment, including observation, was completed in a period of 2 years and 10 months, at which time, a marked correction in facial asymmetry and profile and improvement in smile esthetics could be observed.