Evaluation of the coronary infiltration in temporary prosthesis using different cement agents

Abstract

Forty-five central maxillary incisors extracted from
human beings were selected. After having undergone
standard chemico-mechanical preparation, these incisors
were filled with the calcium hydroxide dressing,
together with saline solution, in 5mm apicals. After sectioning of the crowns, temporary restorations with intraradicular retainers were fixed with Dycal, Temp Bond
and Lysanda. The entire external surface of the roots
and crowns, except for a 2mm area near the cervical
adaptation, was made impermeable. After being immersed
in a 2% Rodamine B solution for 7 days, the
specimens were longitudinally sectioned, and infiltrations
were analyzed. All results were submitted to pertinent
statistical analysis. None of the cements tested
was capable of impeding dye infiltration.