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a technology of incremental movement and teeth, applied in the field of orthodontics, can solve the problems of teeth being misaligned relative to undeformed geometry of the appliance cavity, and achieve the effects of reducing the overall treatment time, accelerating treatment, and preventing recurren
Inactive Publication Date: 2005-11-03
ALIGN TECH
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[0021] Often, it may be desirable to replace the appliances at a time before the “end” tooth arrangement of that treatment stage is actually achieved. It will be appreciated that as the teeth are gradually repositioned and approach the geometry defined by a particular appliance, the repositioning force on the individual teeth will diminish greatly. Thus, it may be possible to reduce the overall treatment time by replacing an earlier appliance with the successive appliance at a time when the teeth have been only partially repositioned by the earlier appliance. Thus, the final digital data set (referred to hereinafter as the FDDS) can actually represent an over correction of the final tooth position. This both speeds the treatment and can offset patient relapse.
[0022] In general, the transition to the next appliance can be based on a number of factors. Most simply, the appliances can be
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That is, when an appliance is first worn by the patient, certain of the teeth
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[0053] According to the present invention, systems and methods are provided for incrementally moving teeth using a plurality of discrete appliances, where each appliance successively moves one or more of the patient's teeth by relatively small amounts. The tooth movements will be those normally associated with orthodontic treatment, including translation in all three orthogonal directions relative to a vertical centerline, rotation of the tooth centerline in the two orthodontic directions (“root angulation” and “torque”), as well as rotation about the centerline.
[0054] Referring now to FIG. 1A, a representative jaw 100 includes sixteen teeth 102. The present invention is intended to move at least some of these teeth from an initial tooth arrangement to a final tooth arrangement. To understand how the teeth may be moved, an arbitrary centerline (CL) is drawn through one of the teeth 102. With reference to this centerline (CL), the teeth may be moved in the orthogonal directions repr...
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Abstract
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.
Description
CROSS-REFERENCES TO RELATED APPLICATIONS [0001] This application is a continuation of application Ser. No. 10 / 660,857 (Attorney Docket No. 018563-001140 / AT-00014.1), filed on Sep. 12, 2003, which was a continuation of application Ser. No. 10 / 040,269 (Attorney Docket No. 018563-001120 / AT-00014.1), filed on Oct. 29, 2001, which was a continuation-in-part of application Ser. No. 09 / 454,278 (Attorney Docket No. 018563-001110 / AT-00014), filed Dec. 3, 1999 (now U.S. Pat. No. 6,309,215, which claimed the benefit of provisional application Ser. No. 60 / 110,881 (Attorney Docket No. 018563-001100 / AT-00013), filed Dec. 4, 1998. Application Ser. No. 10 / 040,269 was also a continuation-in-part of application Ser. No. 09 / 466,353 (Attorney Docket No. 018563-000120 / AT-00003), filed Dec. 17, 1999 (now U.S. Pat. No. 6,398,584), which was a continuation of PCT / US98 / 12861 (Attorney Docket No. 018563-00120PC / AT-00003PC), filed Jun. 19, 1998, which was a continuation-in-part of application Ser. No. 08 / 947,...
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