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US 6,211,264 B1Granted
Dental composition system and method
AssigneeDentsply Research & Development Corp.
InventorsKewang Lu, Paul D. Hammesfahr
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AssigneeDentsply Research & Development Corp.
InventorsKewang Lu, Paul D. Hammesfahr
Estimating the term…
The invention provides dental composition system having curable liquid which is useful alone as a light curable composition and which is useful by mixing with a powder in preselected proportions to form dual cure compositions. The composition system is useful as bonding agent, cement, liner, base, restorative, pit and fissure sealants, and/or core build-up material, having improved adhesion to dentin. After storing the powder and the liquid in separate containers for at least two weeks and then mixing a portion of the powder and a portion of the liquid to form a mixture, the polymerizable compound polymerizes within 20 minutes of the mixing to form a first polymeric material having a flexural strength of at least 50 MPa, and an expansion in water at 37° C. after 90 days of less than 1 percent by volume.
A shelf stable polymerizable liquid comprising a phosphine oxide and a thermally stable peroxide, said peroxide decays by a percentage less than or about equal to the percentage that tert-Butyl peroxybenzoate (TBPO) decays within one week at 23° C., and a polymerizable compound within the scope of the general formula:
A shelf stable polymerizable liquid comprising a phosphine oxide and a thermally stable peroxide, said peroxide decomposing by a percentage less than or about equal to the percentage that tert-Butyl peroxybeiizoate (TBPO) decays within one week at 23° C. and a polymerizable compound within the scope of the general formula:
A storage stable polymerizable liquid composition which includes a polymerizable phosphoric acid compound, diphenyl (2,4,6-trimethyl benzoyl) phosphine oxide and a peroxide compound, said peroxide compound decomposing less than or about equal to the percent of decomposition of tert-Butyl peroxybenzoate (TBPO) within one week at 23° C., after storage of said liquid for 2 weeks said liquid polymerizes within 40 seconds of exposing said liquid to light to form a polymeric material having an expansion of less than 1 percent by volume after 7 days in water at 37° C.
A storage stable polymerizable liquid composition which includes a polymerizable phosphoric acid compound, a phosphine oxide and a peroxide compound, said peroxide compound decomposing by less than or about equal to the percent of decomposition of tert-Butyl peroxybenzoate (TBPO) within one week at 23° C., after storage of said liquid for 2 weeks said liquid polymerizes within 40 seconds of exposing said liquid to light to form a polymeric material having an expansion of less than 1 percent by volume after 7 days in water at 37° C.
Dependencies are inferred from the claim text.