Table 1.

Materials used, composition and application methods.

Material used	Manufacturer	Composition	Application methods
Scotchbond Universal Etchant	3 ​M ESPE, St. Paul, MN, USA	32% phosphoric acid; water	Apply etchant to dentin and react 15 ​s. Rinse thoroughly for 15 ​s with water spray.
Adper Single Bond 2	3 ​M ESPE, St. Paul, MN, USA	Bis-GMA; HEMA; dimethacrylates; initiators; water; and ethanol	Apply two coats of adhesive on the etched dentin surface for 15 ​s, and gently air thin for 5 ​s to evaporate solvents.
Filtek Z350 XT	3 ​M ESPE, St. Paul, MN, USA	Micro hybrid composite filled with barium glass particles	A layer (less than 1.5 ​mm) should be light cured for 20 ​s.

Abbreviations: Bis-GMA, bisphenol-A-diglycidylether dimethacrylate; HEMA, 2-hydroxylethyl methacrylate.