Scotchbond MP and ART Bond were used without intentional enamel etchin
g to bond a total of 43 resin composite restorations in Class V 'abras
ion/erosion' lesions. The cumulative loss rates after 6 months, 1 year
, and 2 years, respectively, were Scotchbond MP: 9, 14, Piper cent; an
d ART Bond: 0, 5, 5 per cent. These data were not compared because eac
h material was::used on different patients. The results support the hi
gher bond strength to dentine in the laboratory of Scotchbond MP compa
red with ifs predecessor Scotchbond 211 There was a slight but clinica
lly insignificant amount of enamel marginal staining for both products
after 2 years, confirming the necessity to etch the enamel for effect
ive marginal sealing.