Analiza cefalometrică în diagnosticul malocluziei de clasa III-a Angle

Abstract

The purpose of the study consists in assessment of cephalometric analysis in diagnosis and treatment of Angle Class III malocclusion. Cephalometric analysis was applied by Ricketts, Steiner and Tweed technique. The study analyzed 68 teleradiography pictures of patients (aged 9-21 years, 32 (47%) males and 36 (53%) females) with various clinical forms of Angle Class III malocclusion. The selection criterion in Angle Class III malocclusion was a mesialized molar relationship with a negative overjet up to 4 mm. The multitude of cephalometric analysis methods can be generally reduced to three basic methods – the angular method, metric method and overlap method. Teleradiography according to Ricketts technique has the advantage of presenting the deformations of the dental and facial skeleton, which are referred to two reference planes, and a general image of dentoalveolar disharmonies can be obtained. The facial convexity in anterior-posterior sense and intermaxillary sagittal relation were analyzed referring the pc. A position to the N-Pg plan = 4.1 mm. The study established a correlation between the facial growth type and the variety of malocclusion. The results proved that Angle Class III malocclusion is frequently found in correlation with the brachycephalic type – in 45 (66.1%) patients, the dolichocephalic one – in 9 (13.23%) patients, and the mesocephalic type – in 7 (10.29%) patients. Cephalometric analysis allows making an exact diagnosis of various structures of face, skull and odontogenic system in relation to the osseous elements what results in development of a correct treatment plan.