Avaliação in vitro da infiltração de corante após apicectomia e acabamento com diferentes tipos de brocas

Abstract

Aims: evaluate the differences of infiltration by apical surface after apicoectomy and different kinds of root finishing. Materials and method: Sixty human cuspids were endodontically treated and received apicoectomy, and were divided in three alleatory groups. Group I received no finishing after the apicoectomy. Group II received standard multifluted bur finishing. Group III received the same finishing of group II, plus brunishing bur. Root surfaces and canal were coated with nail polishing except apical surface. The roots were immersed in 2% methylene blue for 72 hours. Infiltration in internal root surfaces was measured using millimetred magnifying glass by one "blind" examinator. Data were submitted to ANOVA. Results: Group I presented higher infiltration values than groups II and III. These two groups had no statistical difference, although group III showed lower values. Conclusions: finishing of apical surfaces after root resection using multifluted burs have reduced infiltration by dentine. Additional finishing using brunishing burs could even reduce the infiltration, with no statistically significant differences.