Adaptação marginal do agregado de trióxido mineral com e sem cloreto de cálcio em retrocavidades

• Autor(a) principal: Faria-Júnior, Norberto Batista [UNESP]
• Data de Publicação: 2011
• Outros Autores: Bortoluzzi, Eduardo Antonio, Berbert, Fábio Luiz Camargo Villela [UNESP], Tanomaru-Filho, Mario [UNESP], Guerreiro-Tanomaru, Juliane Maria [UNESP]
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://revodontolunesp.com.br/article/51ae4aa71ef1faca3d003679; http://hdl.handle.net/11449/125840
• topic: Cirurgia bucal; Obturação retrógrada; Adaptação marginal dentária; Material retrobturador; Mineral trióxido agregado; Microscopia eletrônica de varredura

Objective: To evaluate the marginal adaptation of the Mineral Trioxide Aggregate (MTA) with and without calcium chloride (CaCl2 ) in root-end cavities. Method: Twenty extracted single-rooted teeth were instrumented and obturated with gutta-percha and AH Plus. All roots were resected using a Zekrya bur and root-end cavities were prepared by using ultrasonic retrotips. Epoxy resin replicas of root-end surfaces after root-end cavity preparation were obtained, sputter coated with gold, and examined by using a scanning electron microscope (SEM). The samples were divided into two experimental groups (n = 10 teeth) according to the root-end filling material employed: G1 - MTA; and G2 - MTA + CaCl2 . After the root-end filling, the teeth were stored in moist gauze at 37 °C for 24 hours. New replicas of the root-end surfaces were obtained and examined under a SEM. Marginal adaptation of the filling materials were categorized as: 1) continuous margin; 2) non-continuous margin. Besides, percentages of continuous margin were calculated. The results were analyzed by the Mann-Whitney test. Results: Visible gaps were seen in 2 roots in G1 and in 3 roots in G2. A continuous margin was observed with 95,59% of MTA and 87,48% of MTA + CaCl2 root-end fillings. There was not statistical difference between the two groups (p > 0.05). Conclusion: The addition of CaCl2 to MTA did not alter its marginal adaptation capability to the dentin walls of root-end cavities.