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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Evaluation of UCLA Implant-Abutment Sealing

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Author(s):
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]
Total Authors: 6
Affiliation:
[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
Total Affiliations: 6
Document type: Journal article
Source: INTERNATIONAL JOURNAL OF ORAL & MAXILLOFACIAL IMPLANTS; v. 29, n. 1, p. 113-120, JAN-FEB 2014.
Web of Science Citations: 4
Abstract

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)

FAPESP's process: 10/06152-9 - Reliability and fracture mode of fixed prosthesis made with indirect composites with and without CAD/CAM infrastructure over implant abutments
Grantee:Estevam Augusto Bonfante
Support Opportunities: Scholarships in Brazil - Post-Doctoral