Transfer apparatus for orthodontic appliances and related methods of manufacturing
A method of making a transfer apparatus includes providing a physical mockup having a shape that corresponds to a positive shape of a patient's dental arch and one or more carrier assemblies that each include a crane body releasably connected to an orthodontic appliance. A transfer apparatus may be formed over the physical mockup, with the transfer tray representing a negative replica of at least a portion of the mockup. The transfer apparatus may be used to seat the appliance on a patient's dental arch, after which point the appliance can be separated from the crane body and bonded to the associated tooth.
1 . A system for indirect bonding of orthodontic appliances, the system comprising:
a transfer body defining a shell configured to receive an outer surface of a tooth of a dental arch and including an interior surface substantially conforming to the contour of at least one tooth of the dental arch, wherein the transfer body defines at least one recess having a receptacle within the shell; and
at least one orthodontic appliance carrier arranged relative to the occlusal surface of the tooth and at least partially received in the receptacle, the carrier comprising:
a crane including a crane body having a tooth-facing surface, the facing surface configured to be arranged facing and spaced apart from an occlusal surface of the tooth when the transfer body is installed on the dental arch,
the orthodontic appliance, the appliance including a base for bonding the appliance to the tooth and a body including a perimeter; and
one or more coupling arms configured to connect the crane body to the appliance, wherein the coupling arms are frangible between the crane and the appliance.
2 . The system of claim 1 , wherein the transfer body defines a plurality of shells, each respective shell of the plurality of shells configured to receive a respective tooth of a plurality of teeth, and wherein the at least one orthodontic appliance carrier comprises a plurality of orthodontic appliance carriers, each carrier arranged in one of the plurality of shells.
3 . The system of claim 1 , wherein each recess receives at least the crane body.
4 . The system of claim 1 , wherein the crane body further includes opposing side surfaces and at least one canted surface opposed to the tooth facing surface.
5 . The system of claim 4 , wherein the interior surface of the receptacle is in contact with at least the at least one canted surface of the crane body.
6 . The system of claim 4 , wherein the interior surface of the receptacle is in contact with the at least one canted surface and at least one of the side surfaces.
7 . The system of claim 1 , wherein the facing surface includes a coupling region from which the coupling arms project, and wherein the coupling region is located in a labial or lingual direction from the tooth when the transfer body is seated on the dental arch.
8 . The system of claim 7 , and further including a channel formed in the transfer body and dimensioned to receive and substantially surround the one or more coupling arms and at least a portion of the appliance.
9 . The system of claim 7 , wherein the one or more coupling arms are configured to project from the facing surface in a direction back towards the tooth surface when the transfer body is seated on the dental arch.
10 . The system of claim 1 , wherein the appliance body has a shape of an orthodontic attachment configured to transfer a force from a clear tray aligner to the tooth.
11 . The system of claim 1 , wherein the appliance is an orthodontic bracket.
12 . The system of claim 1 , wherein the transfer body includes a thermoformed material or an impression material.
13 . The system of claim 1 , wherein the facing surface includes a coupling region from which the coupling arms project, wherein the coupling region projects outward in a labial direction, and wherein the appliance is configured to be bonded to a labial surface of the tooth.
14 . The system of claim 1 , wherein the shell includes a channel at least partially surrounding gingival, mesial, and distal edges of the appliance, wherein the channel is separated from the base of the appliance by a wall section of the transfer body.
15 . A physical mockup for creating a transfer apparatus, the mockup comprising:
a representation of at least a portion of a dental arch, the dental arch including a plurality of teeth, each tooth including an occlusal surface, a lingual surface, and a labial surface;
wherein one or more teeth include an alignment pin projecting upward from the occlusal surface;
an appliance carrier on each alignment pin of the one or more alignment pins, the appliance carrier comprising;
a crane including a crane body having a tooth-facing surface, the facing surface configured to be arranged above but configured to not contact the occlusal surface of the tooth,
the orthodontic appliance, the appliance including a base for bonding the appliance to the tooth and a body including a perimeter; and
one or more coupling arms configured to connect the crane to the appliance, wherein the coupling arms are frangible between the crane and the appliance.
16 . The mockup of claim 15 , wherein the mockup includes a first and a second alignment pin, each alignment pin including a head having a shape, and wherein the dimensions of the cross-sectional shape are substantially the same for each of the alignment pins.
17 . The mockup of claim 15 , wherein each alignment pin includes head having a shape, wherein the shape or dimensions of the first alignment pin head is different than the shape or dimensions of the second alignment pin head.
18 . The mockup of claim 15 , wherein at least one alignment pin includes a shoulder adjacent the occlusal surface of the tooth, the shoulder resulting in a substantially planar occlusal surface at a base of the alignment pin.
19 . The mockup of claim 15 , wherein the proximal region of the carrier includes a recess configured for receipt of the alignment pin, the recess including a shape complemental to the alignment pin and inhibiting rotation of the carrier about a long axis of the pin.
20 . A method for creating a transfer tray for one or more orthodontic appliances, the method comprising:
providing a physical mockup comprising: a representation of at least a portion of a dental arch, the dental arch including a plurality of teeth, each tooth including an occlusal surface, a lingual surface, and a labial surface; wherein one or more teeth include an alignment pin projecting upward from the occlusal surface;
installing, for each tooth including an alignment pin, an appliance carrier on the alignment pin, the carrier comprising:
a crane including a crane body having a tooth-facing surface, the facing surface configured to be arranged above but not contact an occlusal surface of the tooth when the transfer body is installed on the dental arch,
the orthodontic appliance, the appliance including a base for bonding the appliance to the tooth and a body including a perimeter;
one or more coupling arms configured to connect the crane to the appliance, wherein the coupling arms are frangible between the crane and the appliance; and
forming a tray over the mockup and the carrier.