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A system for repositioning teeth comprises a plurality of individual appliances. The appliances are configured to be placed successively on the patient's teeth and to incrementally reposition the teeth from an initial tooth arrangement, through a plurality of intermediate tooth arrangements, and to

A system for repositioning teeth comprises a plurality of individual appliances. The appliances are configured to be placed successively on the patient's teeth and to incrementally reposition the teeth from an initial tooth arrangement, through a plurality of intermediate tooth arrangements, and to a final tooth arrangement. The system of appliances is usually configured at the outset of treatment so that the patient may progress through treatment without the need to have the treating professional perform each successive step in the procedure.

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1. A system for repositioning teeth from an initial tooth arrangement to a final tooth arrangement, said system comprising a plurality of dental incremental position adjustment appliances including: a first appliance having a geometry selected to reposition the teeth from the initial tooth arrang

1. A system for repositioning teeth from an initial tooth arrangement to a final tooth arrangement, said system comprising a plurality of dental incremental position adjustment appliances including: a first appliance having a geometry selected to reposition the teeth from the initial tooth arrangement to a first intermediate arrangement; one or more intermediate appliances having geometries selected to progressively reposition the teeth from the first intermediate arrangement to successive intermediate arrangements; a final appliance having a geometry selected to progressively reposition the teeth from the last intermediate arrangement to the final tooth arrangement; and instructions which set forth that the patient is to wear the individual appliances in a predetermined order which will progressively move the patient's teeth toward the final arrangement, a package, said package containing said first appliance, said one more intermediate appliances and said final appliance, wherein the appliances are provided in a single package to the patient. 2. A system as in claim 1, wherein the appliances comprise polymeric shells having cavities shaped to receive and resiliently reposition teeth from one arrangement to a successive arrangement. 3. A system as in claim 2, wherein the tooth positions defined by the cavities in each successive appliance differ from those defined by the prior appliance by no more than 2 mm. 4. A system as in claim 1, comprising at least two intermediate appliances. 5. A system as in claim 4, comprising at least ten intermediate appliances. 6. A system as in claim 5, comprising at least twenty-five intermediate appliances. 7. A system as in any of claims 1-5 or 6, wherein at least some of the appliances are marked to indicate their order of use. 8. A system as in claim 7, wherein the appliances are marked with sequential numbering directly on the appliances. 9. A system as in claim 7, wherein the appliances are marked on tags which are affixed to the appliances. 10. A system as in claim 7, wherein the appliances are marked by placement in a pouch.