Degree of conversion of two-step etch-and-rinse adhesives: In situ micro-Raman analysis

Journal of Dentistry
Chiara O NavarraMilena Cadenaro

Abstract

DC of three commercial two-step etch-and-rinse adhesives across the dentine-adhesive interface was investigated using micro-Raman spectroscopy. The hypothesis tested was that no difference in DC would exist among the adhesives tested. Adper Scotchbond 1XT (3M ESPE), Prime&Bond NT (Dentsply DeTrey), and Ambar (FGM) were applied on human dentine disks (n=9). Composite increments of 2mm were then applied on the adhesive surface. Raman spectra were collected along the dentine-adhesive interface. The relative intensities of the peaks associated with the mineral (PO(4)(3-) at 960cm(-1)) and the adhesive (CC at 1640cm(-1); phenyl CC at 1610cm(-1)) were used to identify the adhesive within the hybrid layer and calculate its DC. Adper Scotchbond 1XT and Ambar showed similar DC (79±7% and 77±7%, respectively), while a lower DC was found for Prime&Bond NT (70±7%; p<0.05). The hypothesis tested was rejected because differences were found among the adhesives tested. The difference in DC among the three adhesive systems can be attributed to different monomer compositions and solvents. Further studies are needed to correlate DC with other mechanical properties of these adhesives. Insufficient polymerization of an adhesive can result in a weak...Continue Reading

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Citations

Jul 30, 2014·Journal of Endodontics·Johanna Cuadros-SanchezAlessandro D Loguercio
Jul 9, 2013·Dental Materials : Official Publication of the Academy of Dental Materials·Viviane HassAlessandra Reis
Feb 16, 2017·Journal of Applied Oral Science : Revista FOB·Thaynara Faelly BoingOsnara Maria Mongruel Gomes
Dec 23, 2017·BioMed Research International·Giselle Soares AlmeidaLaiza Tatiana Poskus
Dec 13, 2019·Journal of Dental Research·A A Leme-KrausA K Bedran-Russo

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