Orthodontic aligner with isolated segments
A dental appliance includes a first segment comprising a first plurality of tooth receiving cavities shaped to receive and to impart a first distalization force in a distal direction on a first part of a patient dentition on a first jaw. The dental appliance further includes a second segment comprising a second plurality of tooth receiving cavities shaped to receive and to impart a second distalization force in the distal direction on a second part of the patient dentition. The dental appliance further includes a connector shaped to span a plurality of anterior teeth of the patient dentition and to leave open a labial side of the plurality of anterior teeth. The connector operates to decrease transmission of one or more forces between the first segment and the second segment to limit transmission of at least one of the first distalization force or the second distalization force to the plurality of anterior teeth.
1. A dental appliance comprising:
a first segment comprising a first plurality of tooth receiving cavities shaped to receive and to impart a first distalization force in a distal direction on a first part of a patient dentition on a first jaw;
a second segment comprising a second plurality of tooth receiving cavities shaped to receive and to impart a second distalization force in the distal direction on a second part of the patient dentition; and
a connector shaped to span a plurality of anterior teeth of the patient dentition and to leave open a labial side of the plurality of anterior teeth, wherein the connector operates to decrease transmission of one or more forces between the first segment and the second segment to limit transmission of at least one of the first distalization force or the second distalization force to the plurality of anterior teeth.
2. The dental appliance of claim 1 further comprising one or more first retention features shaped to receive one or more elastic bands.
3. The dental appliance of claim 2 , wherein the one or more first retention features are disposed on canine tooth-receiving cavities of one or more of the first segment or the second segment.
4. The dental appliance of claim 2 , wherein the one or more elastic bands are configured to direct the first distalization force or the second distalization force between canine tooth-receiving cavities of the dental appliance and molar tooth-receiving cavities of an opposing dental appliance associated with a second jaw opposite the first jaw.
5. The dental appliance of claim 4 , wherein the one or more elastic bands are further configured to isolate the first distalization force and the second distalization force from pre-molar regions of the dental appliance.
6. The dental appliance of claim 2 , wherein:
the one or more first retention features are configured to receive a first end of a first elastic band of the one or more elastic bands;
one or more second retention features are configured to receive a second end of the first elastic band; and
the one or more second retention features are of an opposing dental appliance configured to be associated with a second jaw opposite the first jaw.
7. The dental appliance of claim 6 , wherein:
the one or more first retention features are disposed on canine tooth-receiving cavities of at least one of the first segment or the second segment; and
the one or more second retention features are disposed on molar tooth-receiving cavities of the opposing dental appliance.
8. The dental appliance of claim 1 , wherein:
the first plurality of tooth receiving cavities are shaped to reposition first teeth in the first part of the patient dentition; and
the second plurality of tooth receiving cavities are shaped to reposition second teeth in the second part of the patient dentition.
9. The dental appliance of claim 1 , wherein the dental appliance is one of a series of incremental dental appliances shaped to reposition the patient dentition from an initial arrangement toward a target arrangement.
10. The dental appliance of claim 1 , wherein the connector has greater elasticity than at least one of the first segment or the second segment.
11. The dental appliance of claim 1 , wherein the connector is affixed to the first segment and the second segment.
12. The dental appliance of claim 1 , wherein the connector is integrally formed with the first segment and the second segment.
13. The dental appliance of claim 1 , wherein the dental appliance is shaped to receive and engage with upper teeth of the patient dentition.
14. The dental appliance of claim 1 , wherein the first segment, the second segment, and the connector are formed of polymer.
15. A polymeric dental appliance comprising:
a first segment comprising a first plurality of tooth receiving cavities shaped to receive and to impart a first distalization force in a distal direction on a first part of a patient dentition on a first jaw;
a second segment comprising a second plurality of tooth receiving cavities shaped to receive and to impart a second distalization force in the distal direction on a second part of the patient dentition;
a connector shaped to span a plurality of anterior teeth of the patient dentition and to leave open a labial side of the plurality of anterior teeth, wherein the connector operates to decrease transmission of one or more forces between the first segment and the second segment to limit transmission of at least one of the first distalization force or the second distalization force to the plurality of anterior teeth; and
one or more first retention features disposed on canine tooth-receiving cavities of one or more of the first segment or the second segment, wherein the one or more first retention features are shaped to receive one or more elastic bands, wherein the one or more first retention features and the one or more elastic bands are configured to direct the first distalization force or the second distalization force between the canine tooth-receiving cavities of the polymeric dental appliance and molar tooth-receiving cavities of an opposing dental appliance associated with a second jaw opposite the first jaw.
16. The polymeric dental appliance of claim 15 , wherein the one or more elastic bands are further configured to isolate the first distalization force and the second distalization force from pre-molar regions of the polymeric dental appliance.
17. The polymeric dental appliance of claim 15 , wherein:
the one or more first retention features are configured to receive a first end of a first elastic band of the one or more elastic bands;
one or more second retention features are configured to receive a second end of the first elastic band; and
the one or more second retention features are of the opposing dental appliance.
18. The polymeric dental appliance of claim 17 , wherein the one or more second retention features are disposed on molar tooth-receiving cavities of the opposing dental appliance.
19. The polymeric dental appliance of claim 15 , wherein:
the first plurality of tooth receiving cavities are shaped to reposition first teeth in the first part of the patient dentition; and
the second plurality of tooth receiving cavities are shaped to reposition second teeth in the second part of the patient dentition.
20. The polymeric dental appliance of claim 15 , wherein one or more of:
the polymeric dental appliance is one of a series of incremental dental appliances shaped to reposition the patient dentition from an initial arrangement toward a target arrangement;
the connector has greater elasticity than at least one of the first segment or the second segment; or
the polymeric dental appliance is shaped to receive and engage with upper teeth of the patient dentition.