Maxillary expander and protraction device
A medical device and method of expanding the maxilla of a patient via application of intra-orally generated forces and/or applying externally generated protraction forces to the maxilla of the patient is provided. The medical device can embody multiple configurations device that include skeletal anchorage device alone or in combination with a fixed aligner or an adjustable aligner.
1. A maxillary expander, comprising:
(i) first bodies, having first apertures and second apertures,
(ii) bone screws configured to screw into the hard palate and configured for insertion into the first apertures,
(iii) first fasteners configured to be threadably screwed into the second apertures, and
(iv) an adjustable aligner, including
(a) second bodies, configured to couple to the first bodies, and
(b) an adjustment mechanism configured to cause the second bodies to move away from each other, to thereby cause the first bodies to move away from each other when coupled to the second bodies,
wherein the adjustable aligner may be coupled and uncoupled from the first bodies while the bone screws are screwed into the hard palate, and
the second bodies have third apertures configured to receive the first fasteners.
2. The maxillary expander of claim 1 , wherein:
each of the first bodies comprises 3 of the first apertures and 2 of the second apertures, and
each of the second bodies comprises 2 of the third apertures.
3. The maxillary expander of claim 1 , wherein:
the first apertures have an axis along openings of the apertures,
the adjustment mechanism has an axis along a direction of expansion, and
the axis along openings of the apertures is substantially perpendicular to the axis along the direction of expansion.
4. The maxillary expander of claim 1 , wherein the first apertures are counter sunk to receive the upper end of the bone screws.
5. The maxillary expander of claim 1 , wherein the adjustment mechanism is configured to rotate relative to the second bodies to cause the second bodies to move toward or away from each other.
6. The maxillary expander of claim 5 , wherein:
each of the first bodies comprises 3 of the first apertures and 2 of the second apertures, and
each of the second bodies comprises 2 of the third apertures.
7. The maxillary expander of claim 5 , wherein:
the bone screws comprise a threaded upper end, and
the first apertures are threaded to receive the threaded upper end of the bone screws.
8. The maxillary expander of claim 3 , wherein:
each of the first bodies comprises 3 of the first apertures and 2 of the second apertures, and
each of the second bodies comprises 2 of the third apertures.
9. The maxillary expander of claim 4 , wherein:
each of the first bodies comprises 3 of the first apertures and 2 of the second apertures, and
each of the second bodies comprises 2 of the third apertures.
10. The maxillary expander of claim 4 , wherein:
the bone screws comprise a threaded upper end, and
the first apertures are threaded to receive the threaded upper end of the bone screws.
11. The maxillary expander of claim 1 , wherein:
the bone screws comprise a threaded upper end, and
the first apertures are threaded to receive the threaded upper end of the bone screws.
12. The maxillary expander of claim 11 , wherein:
each of the first bodies comprises 3 of the first apertures and 2 of the second apertures, and
each of the second bodies comprises 2 of the third apertures.
13. The maxillary expander of claim 1 , wherein the adjustment mechanism comprises a telescopic expansion screw.
14. The maxillary expander of claim 13 , wherein:
each of the first bodies comprises 3 of the first apertures and 2 of the second apertures, and
each of the second bodies comprises 2 of the third apertures.
15. The maxillary expander of claim 1 , wherein the adjustment mechanism is an expansion screw having threads at only one end.
16. The maxillary expander of claim 15 , wherein:
each of the first bodies comprises 3 of the first apertures and 2 of the second apertures, and
each of the second bodies comprises 2 of the third apertures.
17. The maxillary expander of claim 15 , wherein:
the bone screws comprise a threaded upper end, and
the first apertures are threaded to receive the threaded upper end of the bone screws.
18. The maxillary expander of claim 1 , wherein the maxillary expander is configured so that force is not applied to the teeth of the patient.
19. The maxillary expander of claim 18 , wherein:
each of the first bodies comprises 3 of the first apertures and 2 of the second apertures, and
each of the second bodies comprises 2 of the third apertures.
20. The maxillary expander of claim 18 , wherein:
the bone screws comprise a threaded upper end, and
the first apertures are threaded to receive the threaded upper end of the bone screws.