Abstract
BackgoundThis study cephalometrically evaluated the posterior teeth angulation changes of anterior open-bite non-extraction and extraction treatment in the permanent dentition, with anterior vertical elastics.MethodsThe sample consisted of initial and final lateral headfilms of 60 patients divided into 2 groups: Group 1 consisted of 30 patients treated with non-extraction with an initial mean age of 15.26 years and treated with fixed appliances for a mean period of 2.46 years. Group 2 consisted of 30 patients treated with extractions, with an initial mean age of 14.03 years, and treated with fixed appliances for a mean period of 2.49 years. Within-group treatment changes were evaluated with paired t tests. Results were considered statistically significant at P < 0.05.ResultsThe mandibular posterior teeth were significantly uprighted in both groups with both treatment protocols.ConclusionsCorrection of anterior open bite with either non-extraction or extractions with continuous archwires and vertical anterior elastics uprights the mandibular posterior teeth.
Highlights
Open-bite treatment should ideally be performed during the deciduous or mixed dentition, when stability of the results is very high [1,2,3]
Kim [14] suggested that the posterior teeth are more mesially angulated in open-bite patients and developed the multiloop edgewise archwire technique, which incorporates distal tip-back bends to the posterior teeth in order to upright them
It is quite obvious that some uprighting of the posterior teeth may occur even if no tipback bends are incorporated or the accessories of the posterior teeth are not mesially tipped, due to the action of the elastic forces on these teeth [15,16,17, 24]
Summary
Open-bite treatment should ideally be performed during the deciduous or mixed dentition, when stability of the results is very high [1,2,3]. Kim [14] suggested that the posterior teeth are more mesially angulated in open-bite patients and developed the multiloop edgewise archwire technique, which incorporates distal tip-back bends to the posterior teeth in order to upright them. Anterior vertical intermaxillary elastics are used to provide the vertical forces to close the anterior open bite [14]. The most common procedure to close anterior open bite, before mini-implant [18,19,20] and miniplate [21,22,23] development, was to use anterior vertical intermaxillary elastics, especially in non-extraction protocols [14,15,16,17]. It is quite obvious that some uprighting of the posterior teeth may occur even if no tipback bends are incorporated or the accessories of the posterior teeth are not mesially tipped, due to the action of the elastic forces on these teeth [15,16,17, 24]
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