Method and apparatus for vacuum-formed dental appliance
View Patent ↗An appliance and methods are described that include embodiments of a mandibular advancement or positioning device which can use elastic bands to pull the jaw forward. The appliance has an upper plastic tray conforming to the patient's upper teeth and including a set of retention hooks coupled to the upper plastic tray via being encased in plastic, one on the right and one on the left anterior buccal portion of an upper plastic base. The appliance also has a lower plastic tray conforming to the patient's lower teeth and has a set of bite pads integrated with a second set of plastic retention hooks encased in plastic extending outwardly from the tooth. The appliance includes the upper and lower plastic trays and specially formed elastic bands of a plurality of lengths and strengths replaceably attached to the retention hooks on both sides of the trays to pull the mandible forward for treatment.
1. A method of making a dental appliance ( 700 ) for a patient comprising:
temporarily attaching a first set of retention hooks ( 210 ) to a model of the patient's upper teeth;
temporarily attaching a set of bite pads ( 220 ) integrated with a second set of retention hooks ( 230 ) to a model of the patient's lower teeth;
encasing the models of the patent's upper and lower teeth with the temporarily attached first set of retention hooks and the set of bite pads integrated with the second set of retention hooks in plastic ( 410 ) via a machine ( 400 ) to form upper and lower plastic trays adapted to fit over the teeth of the patient, the machine enabling the plastic to encase the temporarily attached first set of retention hooks and the set of bite pads integrated with the second set of retention hooks;
removing the upper and lower plastic trays from the models, wherein the act of removing the upper and lower plastic trays from the models releases the temporarily attached first set of retention hooks and the set of bite pads integrated with the second set of retention hooks front the respective model due to the first and second set of retention hooks being encased by the plastic; and
forming the dental appliance ( 700 ), including the upper and lower plastic trays, by attaching a pair of elastic bands ( 750 ) over the first and second sets of encased retention hooks ( 720 ).
2. The method of claim I wherein the temporarily attaching the first set of retention hooks and the set of bite pads integrated with the second set of retention hooks to models of the patient's upper and lower teeth includes attaching with one or more of a wax, epoxy, a polymer, and/or a glue.
3. The method of claim 1 wherein the machine is a vacuum-forming machine.
4. The method of claim 1 wherein the plastic sheets are approximately three tenths of an inch in thickness.
5. The method of claim 1 wherein the first set of retention hooks and the set of bite pads integrated with the second set of retention hooks include an edge to enable secure encasement of the sheets of plastic.
6. The method of claim 1 wherein the first set of retention hooks is placed between the cuspid and bicuspid teeth of the upper teeth model.
7. The method of claim 1 wherein the set of bite pads integrated with the second set of retention hooks are placed such that the second set of retention hooks are displaced backwardly a distance of 23, 25 or 27 millimeters from the first set of retention hooks.
8. The method of claim 1 wherein the temporarily attaching the first set of retention hooks and the set of bite pads integrated with the second set of retention hooks includes measuring to determine appropriate placement of first set of retention hooks and the set of bite pads integrated with the second set of retention hooks.
9. The method of claim 1 further comprising trimming excess plastic from the upper and lower plastic trays.