A study of prevalence of malocclusion in the three planes in sample of Syrian coast children in mixed dentition stage

Malocclusion is considered one of the most prevalent dental problems .This research aimed to study the prevalence of malocclusion states in the Syrian coast community. The sample of study consists of 1200 patients in mixed dentition stage (569 males – 631 females) with mean age (8.65 ± 1.4 years for male, 8.64 ±1.36 years for females). The study showed a prevalence of malocclusion in about 84.8% of the sample, with about 58.33% for vertical plane malocclusion and 84% for sagittal plane malocclusion, and 37.8% for transversal plane malocclusion. We concluded that it is very important to improve the hygiene awareness between our community population for better prevention and treatment of these problems.

The relationship between soft tissue parameters primary value of the facial profile and the damping of force applied for en masse retraction of Maxillary Anterior teeth (a clinical study)

Aim: This study aims to investigate the relationship between the cephalometric soft tissue parameters value of the facial profile before the start of applying of en masse retraction of Maxillary Anterior teeth (after 14 and 24 extraction) and the damping of the applied orthodontic force v after 40 days of its application. Materials and Methods: material research consist from cephalograms of six patients (3 females and 3 males) between 17 and 19 years from patients undergoing orthodontic evaluation at the Department of Orthodontics and Dentofacial Orthopedics at Tishreen University , ortho. Plane treatment of those patient included 14 and 24 extraction in order to reduce the big sagital overjet by bodily en masse retraction of Maxillary Anterior teeth to achieve o aesthetic harmony of the soft tissues of the facial profile of each one of these particular patients. Pearson's Correlation Coefficient Analysis was performed. The Correlation was verified between each cephalometric variables (both those related to the soft tissue of the facial profile and to the variables determining incisors and the upper first molars axes inclination) on the one hand and between the amount of force at the beginning of the movement (F1) and the amount of force after forty Day of starting application of force (F2), and the amount of force damping (F1 - F2), and the distance that have been closed due to the b bodily en masse retraction of Maxillary Anterior teeth during 40 days. This study showed a certain relationship between the primary values of the soft tissue variables of the facial profile and the force damping applied to achieve bodily en masse retraction of Maxillary Anterior teeth.