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US 4,538,990 AGranted
Method of decreasing the permeability of a dental cavity
AssigneeMedical College of Ga. Research Institute, Inc.
InventorDavid H. Pashley
Life of this patent
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Abstract
A method of decreasing the permeability of dental cavity preparations comprising the steps of first applying from 1 to 30% w/v neutral oxalate salt solution, such as dipotassium oxalate to the smear layer and then applying 0.5 to 3% w/v of an acidic oxalate salt solution, such as a monopotassium monohydrogen oxalate, to the layer. The resultant layer of microscopic calcium oxalate crystals makes the dentin surface more resistant to acid attack.
Claims9
A method of decreasing the permeability of a prepared dental cavity surface, comprising the steps of:
- (a) treating said cavity surface prior to receiving a restorative material with an effective amount of a neutral oxalate salt solution to form an acid resistant first surface;
- and
- (b) applying to said first surface, at a predetermined amount of time after step (a) an effective amount of an acidic oxalate salt solution to form an acid resistant second surface, thereby forming an acid resistant liner on said dental cavity surface.
Dependencies are inferred from the claim text.