Mordida Abierta Anterior: 10 Años Despuès De Retención

Anterior open-bite malocclusion: A longitudinal 10-year postretention evaluation of orthodontically treated patients☆
Gloria Lopez-Gavito, D.D.S., M.S.D., Terry R.Wallen, D.D.S., M.S.D., Robert M. Little, D.D.S., M.S.D., Ph.D., Donald R. Joondeph, D.D.S., M.S.
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Abstract
Long-term response ofthe anterior open-bite malocclusion was evaluated in forty-one white subjects who had undergone orthodontic treatment and were out of retention a minimum of 9 years 6months. The purpose of the study was threefold: (1) to make cephalometric comparisons between a sample of open-bite patients and a sample with normal cephalometric standards,(2) to evaluate treatment and posttreatment changes that occurred in treated open-bite patients, and (3) to search for predictors and associations of value. Changesoccurring across time in the open-bite patients were analyzed by computer means using pretreatment, posttreatment, and long-term cephalometric radiographs and dental casts. Ananalysis of subgroups was reviewed to compare dentoalveolar and skeletal relationships of both stable and relapse groups. More than 35% of the treated open-bite patientsdemonstrated a postretention open bite of 3 mm or more, with the relapse subgroup demonstrating across-time, less mandibular anterior dental height, less upper anterior facialheight, greater lower anterior facial height, and less posterior facial height. Neither the magnitude of pretreatment open bite, mandibular plane angle, nor any other singleparameter of dentofacial form proved to be a reliable predictor of posttreatment stability.

Keywords: Open bite, postretention, relapse, stability, cephalometric