Evaluation of UCLA Implant-Abutment Sealing

Autor(es)

Ramos, Marcelo B. ^[1] ; Pegoraro, Luiz F. ^[2] ; Takamori, Esther ^[3] ; Coelho, Paulo G. ^{[4, 5]} ; Silva, Thelma L. ^[6] ; Bonfante, Estevam A. ^{[2, 3]}

Afiliação do(s) autor(es)

^[1] Univ Fortaleza, Hlth Sci Ctr, Fortaleza, Ceara - Brazil

^[2] Univ Sao Paulo, Bauru Sch Dent, Dept Prosthodont, Bauru, SP - Brazil

^[3] UNIGRANRIO Univ, Sch Hlth Sci, Postgrad Program Dent, BR-25071202 Duque De Caxias, RJ - Brazil

^[4] NYU, Dept Biomat & Biomimet, New York, NY - USA

^[5] NYU, Coll Dent, Dept Periodontol & Implant Dent, New York, NY - USA

^[6] Univ Sao Paulo, Bauru Sch Dent, Dept Biol Sci, Bauru, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: INTERNATIONAL JOURNAL OF ORAL & MAXILLOFACIAL IMPLANTS; v. 29, n. 1, p. 113-120, JAN-FEB 2014.
• Citações Web of Science: 4

Resumo

Purpose: To evaluate the effect of the presence of a prefabricated cobalt-chromium (CoCr) margin in a universal castable long abutment (UCLA) on the sealing capability and fit of the implant-abutment interface. Materials and Methods: One-hundred twenty external hexagon implants (SIN) were divided into two groups (n = 60 each) to receive UCLA abutments from six manufacturers (n = .10 each) either with or without a CoCr margin (n = 60 each). Abutments were cast and 12 groups were formed: M (Micro plant), I (Impladen), S (SIN), Sv (Signo Vinces), T (TitaniumFix), and B (Bionnovation). Sealing was determined by placing 0.7 mu L of 0.1% toluidine blue in the implant wells before abutment torquing. Implant-abutment samples were placed into 2.0-mL vials containing 0.7 mL of distilled water to maintain the implant-abutment interface, and aliquots of 100 mu L of water were retrieved at 1, 3, 6, 24, 48, 72, 96, and 144 hour incubation times for measurement of absorbance in a spectrophotometer, and returned for repeated measurements. Two-way ANOVA (P < .05) and Tukey's test were used. Scanning electron microscopy (SEM) was used for observation of the implant-abutment fit. Results: Groups M, Sv, and T without the CoCr margin resulted in complete release of toluidine blue at 1 hour, whereas I, S, and B did so at 3, 24, and 96 hours, respectively. Complete leakage in abutments with the prefabricated margin occurred at 6 hours for S; 24 hours for Sv, T, and B; and 72 hours for M and I. Implant-abutment gaps were observed in all groups. A poorer fit was depicted for groups M and T without the CoCr margin. Conclusion: Complete leakage was observed for all UCLA abutments regardless Of the presence of the CoCr margin. Implant-abutment gaps were observed in all groups. (AU)

• Processo FAPESP: 10/06152-9 - Confiabilidade e modos de fratura de próteses fixas em compósitos indiretos com e sem infra-estrutura CAD/CAM sobre implantes
• Beneficiário: Estevam Augusto Bonfante
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado