Τίτλος:
Effect of silane reaction time on the repair of a nanofilled composite using tribochemical treatment
Γλώσσες Τεκμηρίου:
Αγγλικά
Περίληψη:
Purpose: To investigate the influence of silane reaction time on the repair strength of an aged nanofilled composite and to characterize the bonding mechanism. Materials and Methods: Nanofilled composite disks (n = 110, Filtek Supreme XT) were aged for 90 days in water. After tribochemical treatment (CoJet-Sand), the specimens were assigned to 5 groups (n = 22), primed with silane (Espe-Sil), and left to react for 1, 2, 3, 4, and 5 min. A thin layer of adhesive (Visio-Bond) was applied and a new composite with the same dimension was placed and cured. Non-aged specimens immediately layered and cured using the incremental technique served as controls. After aging (30 days in water plus 5000 thermal cycles), the interface was subjected to a shearing force until failure. Failure mode was evaluated under a stereomicroscope and scanning electron microscopy (SEM). Additional aged and treated surfaces were evaluated for morphology as well as elemental and molecular composition using SEM/EDX and ATR-FTIR. Results: The mean shear bond strength (SBS) of the repaired specimens was 53.9 ± 8.6 MPa, with no significant difference among the various reaction times, but significantly lower compared to the control (88.1 ± 12.5 MPa). Tribochemical treatment created an irregular surface morphology with particles imbedded in the aged surface. Interfacial SEM/EDX analysis showed a 5-μm non-uniform high atomic number zone rich in Al and Si. Conclusion: Tribochemical treatments for repairing composite using a short silane reaction period (1 min) are equally effective as the prolonged reaction periods (2 to 5 min), yielding interfacial shear strength of ~60% of unrepaired material.
Συγγραφείς:
Pilo, R.
Brosh, T.
Geron, V.
Levartovsky, S.
Eliades, G.
Περιοδικό:
Journal of Adhesive Dentistry
Εκδότης:
Quintessence Publishing Co, Inc
Λέξεις-κλειδιά:
aluminum; bisphenol A bis(2 hydroxypropyl) ether dimethacrylate; dental material; Filtek Supreme; nanocomposite; resin; resin cement; silane derivative; silicon; Visio-Bond; water, chemistry; dental bonding; dental etching; human; infrared spectroscopy; materials testing; mechanical stress; procedures; scanning electron microscopy; shear strength; spectrometry; surface property; temperature; time factor, Aluminum; Bisphenol A-Glycidyl Methacrylate; Composite Resins; Dental Bonding; Dental Etching; Dental Materials; Humans; Materials Testing; Microscopy, Electron, Scanning; Nanocomposites; Resin Cements; Shear Strength; Silanes; Silicon; Spectrometry, X-Ray Emission; Spectroscopy, Fourier Transform Infrared; Stress, Mechanical; Surface Properties; Temperature; Time Factors; Water
DOI:
10.3290/j.jad.a35907
