Resumo

MELLO NETO, Oswaldo Loureiro de; SOUZA, Arlindo Di Spagna; MACHADO, Manoel Eduardo de Lima  e  SYDNEY, Gilson Blitzkow. Apical sealing ability of some retrograde filling materials. RGO, Rev. gaúch. odontol. (Online) [online]. 2010, vol.58, n.4, pp. 497-501. ISSN 1981-8637.

OBJECTIVE: Assess marginal leakage by linear penetration of rhodamine B dye in retrograde fillings filled with different materials. METHODS: Sixty-one permanent teeth extracted and treated endodontically had their 3 apical millimeters amputated cross-sectionally and 3 mm deep retro-cavities were prepared with ultrasonic tips. The specimens were divided into experimental groups where the retrofilled materials were inserted and submerged in a dye for 24 hours. The groups consisted of Super EBA, MTA and Histoacryl, in addition to the positive and negative controls. RESULTS: Marginal leakage was analyzed by the Image J software and multiple comparisons with the Kruskal-Wallis test revealed differences among the materials. The material with the best marginal sealing capacity was Histoacryl. None of the specimens sealed with this product presented leakage. Super EBA was next in terms of sealing capacity followed by MTA, but their performances were similar. CONCLUSION: Histoacryl presented the best sealing capacity of the three studied materials.

Palavras-chave : Endodontics; Dental leakage; Retrograde obturation.