Palatal expander with skeletal anchorage devices
A series of a palatal expanders increasing width can be used to gradually expand a patient's palate. Each palatal expander may have a palatal region flanked by teeth regions. The palatal region can have a plurality of anchor-receiving features (e.g., anchor interfaces) that allow the palatal expander to be attached to temporary anchorage device anchors that have been implanted into the patient's maxilla.
1. A system for expanding a patient's palate through a plurality of incremental stages of a palatal expansion plan, the system comprising:
a plurality of palatal expanders, each palatal expander of the plurality of palatal expanders having a different shape and size for expanding the patient's palate according to a different incremental stage of the palatal expansion plan, the plurality of palatal expanders including a first palatal expander according to a first incremental stage of the palatal expansion and a second palatal expander according to a second incremental stage of the palatal expansion, each palatal expander comprising:
a palatal region configured to mate with the patient's palate at one incremental stage of the plurality of incremental stages of the palatal expansion plan, and to exert an outward, lateral force on the patient's palate during the one incremental stage of the palatal expansion plan; and
at least two anchor interfaces, each anchor interface configured to receive an anchor extending from a maxilla of the patient therein, and to direct at least a portion of the outward, lateral force to the maxilla through the anchors to facilitate skeletal expansion of the maxilla during the one incremental stage of the palatal expansion plan,
wherein one or more of a location, a size and a shape of the at least two anchor interfaces of the first palatal expander is different than a location, a size and a shape of the at least two anchor interfaces of the second palatal expander.
2. The system of claim 1 , wherein each of the at least two anchor interfaces of each palatal expander of the plurality of palatal expanders has an elastic interface therein, wherein the elastic interface has a greater elasticity than the palatal region such that an anchor will displace the elastic interface more than the palatal region when the anchor is received in the anchor interfaces.
3. The system of claim 2 , wherein the elastic interface comprises a compressible material.
4. The system of claim 3 , wherein the compressible material has a thickness of between about 0.2 mm to 1.5 mm.
5. The system of claim 1 , wherein:
the palatal region of each palatal expander of the plurality of palatal expanders has a first rigidity; and
each palatal expander of the plurality of palatal expanders has a soft portion having a second rigidity less than the first rigidity, the second rigidity configured to grip and couple the anchors to each palatal expander of the plurality of palatal expanders.
6. The system of claim 1 , wherein the at least two anchor interfaces are located on opposing lateral sides of the palatal region.
7. The system of claim 1 , wherein the at least two anchor interfaces are each configured to receive a temporary anchorage device.
8. The system of claim 1 , wherein the at least two anchor interfaces of each palatal expander of the plurality of palatal expanders are integrally formed with each palatal expander of the plurality of palatal expanders.
9. The system of claim 1 , wherein the at least two anchor interfaces of each palatal expander of the plurality of palatal expanders comprise an opening at least partially through the palatal region.
10. The system of claim 1 , further comprising an anchor template having at least two anchor guides for guiding implantation of the anchors into the maxilla, wherein the at least two anchor guides are positioned on the anchor template such that the anchors are inserted into the maxilla in anchor locations that correspond to the anchor interfaces of the each palatal expander of the plurality of palatal expanders.
11. The system of claim 1 , wherein each anchor interface has a sloped surface configured to facilitate insertion of the anchor therein.
12. The system of claim 1 , wherein each palatal expander of the plurality of palatal expanders comprises at least four anchor interfaces.
13. The system of claim 1 , wherein the palatal region of each palatal expander of the plurality of palatal expanders is configured to be placed against the patient's palate when the at least two anchor interfaces are each coupled with anchors.
14. The system of claim 1 , wherein at least a portion of the palatal region of each palatal expander of the plurality of palatal expanders is configured to be spaced apart from the patient's palate when the anchors are coupled with the anchor interfaces.
15. The system of claim 1 , wherein the plurality of palatal expanders are fabricated from a rigid or semi-elastic material.
16. The system of claim 1 , wherein each palatal expander of the plurality of palatal expanders comprises a teeth region configured to be placed over a portion of the patient's teeth.
17. The system of claim 16 , wherein the teeth region is configured to be placed over one or more of: a lingual surface of the patient's teeth, an occlusal surface of the patient's teeth, and a buccal surface of the patient's teeth.
18. The system of claim 1 , wherein an opening of each of the at least two anchor interfaces includes a liner therein, wherein the liner is made of compressible material such that an anchor received in a corresponding anchor interface will displace the liner more than the palatal region when the anchor is received in the corresponding anchor interface.
19. A system for expanding a patient's palate, the system comprising:
a series of palatal expanders, wherein each palatal expander comprises:
a palatal region, wherein the palatal region is sized and shaped to exert an outward, lateral force that expands the patient's palate;
at least two anchor interfaces located on opposing lateral sides of the palatal region, the anchor interfaces configured to receive anchors implanted in the patient's maxilla such that the outward, lateral force exerted by the palatal region are transmitted through the anchors to the patient's maxilla; and
wherein each of the anchor interfaces has an elastic interface therein, wherein the elastic interface has a greater elasticity than the palatal region such that an anchor will displace the elastic interface more than the palatal region when the anchor is received in the anchor interfaces.
20. A system for expanding a patient's palate through a plurality of incremental stages of a palatal expansion plan, the system comprising:
a plurality of palatal expanders, each palatal expander of the plurality of palatal expanders having a different shape and size for expanding the patient's palate according to a different incremental stage of the palatal expansion plan, each palatal expander comprising:
a palatal region configured to mate with the patient's palate at one incremental stage of the plurality of incremental stages of palatal expansion, and to exert an outward, lateral force on the patient's palate during the one incremental stage of the palatal expansion plan; and
a plurality of anchor interfaces each configured to receive an anchor inserted in a maxilla of the patient, and to direct at least a portion of the outward, lateral force to the maxilla through the anchors to expand the maxilla during the one incremental stage of the palatal expansion plan, each of the plurality of anchor interfaces including an elastic liner having a greater elasticity than the palatal region such that a corresponding anchor positioned therein will displace the elastic liner more than the palatal region.
21. The system of claim 20 , wherein the plurality of palatal expanders includes a first palatal expander according to a first incremental stage of the palatal expansion plan and a second palatal expander according to a second incremental stage of the palatal expansion plan, wherein one or more of a location, a size and a shape of the plurality of anchor interfaces of the first palatal expander is different than a location, a size and a shape of the plurality of anchor interfaces of the second palatal expander.