[The edge-centroid relation and overbite in Class-II.1 patients. A follow-up study].

This follow-up study evaluates lateral skull radiographs and jaw casts taken prior to treatment, at the end of treatment, and after a control period of one at a minimum of 25 orthodontically treated children, 14 males and 11 females, who had an Angle class II, 1 malocclusion and a deep overbite with the lower incisors impinging upon the palatal gingiva. The study's object of interest was the anterior-posterior relationship of the lower incisor edge to the upper incisor root centroid (i.e., the "edge-centroid relationship", Houston [7]). Its intent was to evaluate the correlation between edge-centroid relationship and an overbite relapse respectively when viewed in relation to the developments which take place in the dental and skeletal variables during the course of overbite reduction. The edge-centroid relationship was found, to present an interesting screening method in diagnosing class II, 1 cases, and, although with some reservations, the relationship is also useful in planning treatment.