“…This is in accord with the views of others who recommend providing some mechanical retention for composite restorations 22 and that roughening the surface is advisable to remove superficial sclerotic dentine to which current composite bonding methods are less effective. 16,23 When placing glass ionomer, preparation of the cavity margins is also necessary to allow adequate bulk for this brittle material. 24 Despite the ability of some materials to adhere to tooth tissue, it would appear advisable in practice to use a bur to prepare these lesions in some way, whichever material is selected.…”