Modifica？？es no periodonto de ratos diabéticos após a movimenta？？o ortod？ntica

aim: the aim of this study was to evaluate the periodontal ligament changes after induced dental movement of the upper incisor in diabetic rats. methods: twenty wistar rats (rattus norvegicus) with 105 days of age were used. the rats were divided in four groups: c - normoglicemic animals not submitted to dental movement; cao - normoglicemic animals submitted to dental movement; d - diabetic animals not submitted the dental movement; dao - diabetic animals submitted to dental movement. the animals had remained with dental movement devices during 5 days. the number of sanguine vessels and the thickness of the periodontal ligament were evaluated at cervical, medium and apical histological cut regions. results and conclusion: at tension side, the dental movement in the animals of group cao resulted in a thicker periodontal ligament (17.64% apical, 39.28% medium, 51.35% cervical) when compared to c group (p < 0.05 for medium and cervical area). group dao exhibited an increase of periodontal ligament thickness of 50.55% (apical), 48.14% (average) and 50% (cervical) when compared to group d (p < 0.05). the periodontal ligament sanguine vessels number did not differed significantly for all groups (p < 0.05). at tension side, bone reabsorption lacunae were observed in cao, d and dao groups. the pressure side was not examined in this study phase.