Method for indicating shelf-life after mixing pre-dosed, pre-packaged two-part dental compositions
First Claim
1. A syringe system for mixing and for recording the mixing date to permit monitoring of the shelf life of a mixed two-part dental composition, the syringe system comprising:
- a first pre-dosed composition pre-packaged so as to be contained in a first syringe having a barrel with a first plunger slidable within the first barrel;
a second pre-dosed composition pre-packaged so as to be contained in a second syringe having a barrel, with a second plunger slidable within the second barrel, and the separate compositions each having a shelf life significantly greater than the shelf life of the two compositions after they are mixed;
the first and second plungers being operable so that by first sliding the first plunger into the first syringe barrel the first pre-dosed composition is introduced into the second syringe barrel so that it contacts the second pre-dosed composition, the two compositions thereafter being either further mixed using one or both syringe barrels, or else applied in a dental procedure by expressing the mixed contents from the second syringe barrel; and
time and temperature sensitive marking means, disposed on one of the first or second syringes, which, when activated upon mixing the two compositions, thereafter provides a visual indication which automatically changes over time so as to indicate the lapsed time and temperature conditions from when the two compositions were mixed, and which also changes as a function of temperature, so that the shelf life of the mixed compositions is easily ascertainable from the visual indication.
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Accused Products
Abstract
A pre-dosed, pre-packaged mixing system and associated method for mixing, storing, and dispensing a two-part dental composition that becomes less stable upon mixing. The mixing system includes a pre-dosed, pre-packaged quantity of a first component contained within a first chamber, and a pre-dosed, pre-packaged quantity of a second component contained within a second chamber. The chambers are separated by separation means so as to separate the two-components prior to mixing. Once mixed, the practitioner is able to record a mixing and/or expiration date on at least a portion of the mixing system so as to indicate a shelf-life of the less stable mixed dental composition.
68 Citations
26 Claims
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1. A syringe system for mixing and for recording the mixing date to permit monitoring of the shelf life of a mixed two-part dental composition, the syringe system comprising:
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a first pre-dosed composition pre-packaged so as to be contained in a first syringe having a barrel with a first plunger slidable within the first barrel; a second pre-dosed composition pre-packaged so as to be contained in a second syringe having a barrel, with a second plunger slidable within the second barrel, and the separate compositions each having a shelf life significantly greater than the shelf life of the two compositions after they are mixed; the first and second plungers being operable so that by first sliding the first plunger into the first syringe barrel the first pre-dosed composition is introduced into the second syringe barrel so that it contacts the second pre-dosed composition, the two compositions thereafter being either further mixed using one or both syringe barrels, or else applied in a dental procedure by expressing the mixed contents from the second syringe barrel; and time and temperature sensitive marking means, disposed on one of the first or second syringes, which, when activated upon mixing the two compositions, thereafter provides a visual indication which automatically changes over time so as to indicate the lapsed time and temperature conditions from when the two compositions were mixed, and which also changes as a function of temperature, so that the shelf life of the mixed compositions is easily ascertainable from the visual indication. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 18, 19)
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14. In a syringe system for mixing for recording the mixing date to permit monitoring of the shelf life of a mixed two-part dental composition, a method comprising steps for:
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providing a first pre-dosed composition pre-packaged so as to be contained in a first syringe having a barrel with a first plunger slidable within the first barrel; providing a second pre-dosed composition pre-packaged so as to be contained in a second syringe having a barrel, with a second plunger slidable within the second barrel, and the separate compositions each having a shelf life significantly greater than the shelf life of the two compositions after they are mixed; providing a time sensitive and temperature-dependent marking means, disposed on one of the first or second syringes; operating the first and second plungers so that by first sliding the first plunger into the first syringe barrel the first pre-dosed composition is introduced into the second syringe barrel so that it contacts the second pre-dosed composition, the two compositions thereafter being either further mixed using one or both syringe barrels, or else applied in a dental procedure by expressing the mixed contents from the second syringe barrel; upon mixing the two dental composition, activating the time and temperature sensitive markings, means in order to provide a visual indication which automatically changes over time so as to indicate the lapsed time and temperature conditions from when the two compositions were mixed, so that the shelf life of the mixed compositions is easily ascertainable from the visual indication. - View Dependent Claims (15, 16, 17, 20, 21, 22, 23, 24, 25, 26)
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Specification