A new technique for assessing hybrid layer interfacial micromorphology and integrity: two-photon laser microscopy - D'Alpino, Paulo Henrique Perlatti; Pereira, José Carlos; Svizero, Nádia R.; Rueggeberg, Frederick A.; Carvalho, Ricardo Marins de; Pashley, David H. (Journal of Adhesive Dentistry, 2006)