Polymicrobial Leakage and Retention of MTA and Portland Cement in a Model of Apexification

• Published in: Pesquisa brasileira em odontopediatria e clínica integrada Vol. 19; no. 1; pp. 1 - 9
• Main Authors: Brito-Júnior, Manoel, Sá, Maria Aparecida Barbosa de, Nobre, Sérgio Avelino Mota, Faria-eSilva, André Luis, Pereira, Rodrigo Dantas, Camilo, Carla Cristina, Silveira, Frank Ferreira, Sousa-Neto, Manoel Damião
• Format: Journal Article
• Language: English; Portuguese
• Published: Associação de Apoio à Pesquisa em Saúde Bucal 2019
• Subjects: DENTISTRY, ORAL SURGERY & MEDICINE; Tooth Injuries; Dentition Permanent; Endodontics; Apexification
• ISSN: 1519-0501; 1983-4632
• DOI: 10.4034/PBOCI.2019.191.108

Abstract Objective: To evaluate the sealing capacity and retention of apical barriers made with mineral trioxide aggregate (MTA) and Portland cement (PC). Material and Methods: Fifty-six bovine incisors were sectioned 8 mm above and 12 mm below the cement-enamel junction. The root canal was enlarged with a diamond drill to create a standard 2.5 mm diameter opening. Apical sheets of 5 mm thickness were placed using white MTA-Angelus or white PC. Fifteen samples of each material were exposed to human saliva in a dual chamber apparatus and casting was evaluated at 30 days. Samples without apical barriers and fully sealed samples were used as positive and negative controls (n = 3), respectively. Data were analyzed by Fisher's exact test (p<0.05) after 3 periods: 1 to 10 days (P1); days 11 to 20 (P2); and days 21 to 30 (P3). Then, three 1 mm thick sections were obtained at the apical level of other root samples of each material (n = 10) and the push-out test was performed Results: The leakage rates in P1, P2 and P3 were 60%, 73.3% and 100% for the MTA; and 73.3%, 86.7% and 100% for CP, with no significant difference between materials, regardless of the period analyzed. There were no significant differences between the bond strengths for both cements (p>0.05) Conclusion: Mineral trioxide aggregate and Portland cement apical barriers presented similar sealing ability and bond strength values.