Intraarch and interarch relationships of the anterior teeth and periodontal conditions.

This study was undertaken to investigate the association between orthodontic anomalies and periodontal conditions. Three parameters of the intraarch relationship on both dental arches (displacement of contact point, crowding, and spacing) and four parameters of interarch relationship (overjet, open bite, crossbite, and overbite) assessed with either Index of Orthodontic Treatment Need or Index of Complexity, Outcome and Need were correlated with parameters of periodontal condition, ie, hygiene (Plaque Index and Retention Index), inflammation (gingival inflammation and Gingival Bleeding Index), and periodontal disease severity (pocket depth, clinical attachment loss, and gingival recession). In the main, weak but significant correlations were found between certain parameters of intraarch and interarch relationship and some indices of periodontal conditions. Within the limitations of this study, it was concluded that providing orthodontic treatment on the ground of deleterious effect of malocclusion and malpositioned teeth on periodontal condition is justified.