Análisis de variables determinantes de un tratamiento ortodóncico-quirúrgico en una muestra de pacientes con clase iii

Abstract

INTRODUCTION Class III malocclusion is one of the most challenging problems for orthodontists in their clinical practice. Its etiology is multifactorial. Regarding adult patients, who have already finished growth and, therefore, orthopedics is not possible, we only have two ways: camouflage through a purely orthodontic treatment or an orthodontic-surgical treatment.The general objective is to determine if there are cephalometric variables that allow deciding whether a skeletal class III patient without growth should be treated by camouflage or by orthodontics and orthognathic surgery. MATERIALS AND METHODS The sample was selected through a non-probabilistic sampling of consecutive cases of patients with Class III malocclusion without growth. The total sample consisted of 45 patients treated with surgery (23 women and 22 men) and 56 patients treated only with orthodontics (29 women and 27 men). CONCLUSIONS The cephalometric measurements that have been statistically significant to differentiate the surgical group from the camouflage group at the beginning of the treatment have been the following ones: mandibular plane (Steiner), gonial angle (Jarabak), lower gonial angle (Jarabak), ANB angle (Steiner), Wits appraisal, facial convexity (Ricketts), Tweed angle, overjet, mentolabial angle and Holdaway H angle. ¿ At the end of the treatment, statistically significant differences were found between the group were: mandibular plane (Steiner), gonial angle (Jarabak), ANB angle (Steiner), facial convexity (Ricketts), nasolabial angle, mentolabial angle and Holdaway H angle. ¿ In general, cephalometric measurements have improved in both groups, getting closer to the norm after treatment. ¿ The following cephalometric measurements were found to be discriminatory between both groups: mandibular plane (Steiner), Tweed angle and overjet. The 75.2% of the studied sample could be correctly classified.