Orthodontic bracket adhesive and abrasive for removal thereof
AssigneeMinnesota Mining and Manufacturing Company
InventorRonald M. Randklev
Life of this patent
Estimating the term…
Abstract
A manufacture for orthodontic bracket application and removal, employing an orthodontic bracket adhesive containing a non-toxic, inorganic filler which is insoluble in mouth fluids and has a Mohs hardness less than about 4.5, together with an abrasive for removal of the adhesive. The abrasive is a non-toxic, inorganic material having a Mohs hardness greater than that of the adhesive filler but less than about 5.
Claims9
A dental abrasive composition, comprising finely divided inorganic material admixed with a solid binder, said inorganic material being non-toxic, having a Mohs hardness less than about 5, and being in the form of generally equiaxed particles having a mean diameter of at least 190 micrometers, said inorganic material being at least 30% of the total weight of said composition, and said composition being in the form of a scraping tool, a cutting tool, or a grinding attachment for a standard powered dental tool, said tool having sufficiently low hardness to avoid damaging tooth enamel when used thereon.
Dependencies are inferred from the claim text.