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- Title
Retentive strength evaluation of resin cements in two-piece zirconia abutments.
- Authors
Pinheiro Lacerda, Gabriel; Furtado de Carvalho, Rodrigo; Da Silva Sudré, João Paulo; das Graças Afonso de Miranda Chaves, Maria; Pessôa Pereira Leite, Fabíola
- Abstract
OBJECTIVE: To evaluate, in vitro, the retentive strength between the two-piece zircônia abutments, comparing different types of resin cements. METhODS: Thirty zirconia parts manufactured by CAD-CAM technology were divided into three groups, according to the resin cement used for their cementation on the metallic titanium bases: dual-curing self-adhesive, dual-curing conventional and chemically activated. The specimens were stored in distilled water (24 hours, 37°C), followed by thermocycling and submitted to 30 s in baths of 5°C and 55°C, 2 s displacement time, with 6,000 cycles. The mechanical cycling tests were carried out with specimens submerse in distilled water (37°C), with load of 100N, 2 hz frequency and 200,000 cycles. After thermomechanical tests, the specimens were submitted to a tensile test using a universal testing device until the complete separation of, which were analyzed in stereomicroscope, to determine the cementation failure pattern. RESULTS: The adhesive-type cementation failure occurred in all specimens. The retentive strength values did not differ statistically between the groups. CONCLUSION: All three tested resin cements provided enough retentive to the two-piece zirconia abutments.
- Subjects
COMPUTER-aided design; DENTAL abutments; DENTAL cements; SYNTHETIC gums &; resins; PROSTHETICS; TIME; TITANIUM; PHYSIOLOGIC strain; TENSILE strength; IN vitro studies
- Publication
Revista Odonto Ciencia, 2017, Vol 32, Issue 3, p121
- ISSN
0102-9460
- Publication type
Article
- DOI
10.15448/1980-6523.2017.3.26833