Manufacture of patient-specific orthodontic tube
Embodiments relate to the methodology of direct manufacture of a customized labial/lingual orthodontic tube by using a ceramic slurry-based additive manufacturing (AM) technology. For example, a method of manufacturing customized ceramic labial/lingual orthodontic tubes by additive manufacturing may comprise measuring dentition data of a profile of teeth of a patient, based on the dentition data, creating a three-dimensional computer-assisted design (3D CAD) model of the patient's teeth, and saving the 3D CAD model, designing a virtual 3D CAD tube structure model for a single labial or lingual tube structure based upon said 3D CAD model, importing data related to the 3D CAD tube structure model into an additive manufacturing machine, and directly producing the tube with the additive manufacturing machine by layer manufacturing from an inorganic material including at least one of a ceramic, a polymer-derived ceramic, and a polymer-derived metal.
1 . A method of manufacturing customized orthodontic tubes for patients, the method comprising:
obtaining a three-dimensional (3D) model of one or more teeth of a patient;
generating a 3D model of an orthodontic tube structure using the 3 D model of the one or more teeth of the patient, the orthodontic tube structure comprising:
a base comprising a circumferential surface; and
a debonding structure that facilitates debonding of an orthodontic tube from a tooth of the patient, the debonding structure separated from the surface of the base by material of the orthodontic tube structure, wherein the debonding structure comprises a ridge for application of force to the orthodontic tube for removal from the tooth, the ridge located on at least a portion of the circumferential surface of the base; and
using an additive manufacturing device to produce a customized orthodontic tube based on the 3D model of the orthodontic tube structure.
2 . The method of claim 1 , wherein at least a portion of the debonding structure has a customized shape based on a 3D model of at least one of the one or more teeth.
3 . The method of claim 1 , wherein the debonding structure comprises a stress concentrator in a portion of the orthodontic tube structure.
4 . The method of claim 3 , wherein the stress concentrator is shaped such that the customized orthodontic tube fractures when a normal force applied to the stress concentrator.
5 . The method of claim 3 , wherein the stress concentrator runs along an occlusal-gingival direction of the orthodontic tube structure.
6 . The method of claim 3 , wherein the stress concentrator includes a portion with a profile that is substantially triangular cross-section.
7 . The method of claim 1 , wherein the ridge is proximate an interface of the base of the orthodontic tube structure and a face of the orthodontic tube structure.
8 . The method of claim 1 , wherein a height of the ridge varies along a mesial-distal axis of the orthodontic tube structure.
9 . An additively manufactured customized orthodontic tube produced by an additive manufacturing device using a 3D model of an orthodontic tube structure generated using a 3D model of one or more teeth of a patient, the additively manufactured customized orthodontic tube comprising:
a base comprising a circumferential surface; and
a debonding structure that facilitates debonding of the customized orthodontic tube from a tooth of the patient, the debonding structure separated from the surface of the base by material of the customized orthodontic tube, wherein the debonding structure comprises a ridge for application of force to the orthodontic tube for removal from the tooth, the ridge located on at least a portion of the circumferential surface of the base.
10 . The additively manufactured customized orthodontic tube of claim 9 , wherein at least a portion of the debonding structure has a customized shape based on a 3D model of at least one of the one or more teeth.
11 . The additively manufactured customized orthodontic tube of claim 9 , wherein the debonding structure comprises a stress concentrator in a portion of the customized orthodontic tube.
12 . The additively manufactured customized orthodontic tube of claim 11 , wherein the customized orthodontic tube fractures in response to application of a normal force to the stress concentrator.
13 . The additively manufactured customized orthodontic tube of claim 11 , wherein:
the stress concentrator comprises an approximately V-shaped space between two portions of the customized orthodontic tube; and
a vertex of the approximately V-shaped space is proximate the base.
14 . The additively manufactured customized orthodontic tube of claim 13 , wherein:
each of the two portions comprises a substantially flat wall on a respective side of the approximately V-shaped space.
15 . The additively manufactured customized orthodontic tube of claim 9 , further comprising:
a face perpendicular to the base;
wherein the ridge is located, at least in part, proximate an intersection of the base and the face.
16 . The additively manufactured customized orthodontic tube of claim 15 , wherein the face comprises a slot opening sized for an arch wire to be inserted through the slot.
17 . The additively manufactured customized orthodontic tube of claim 9 , wherein the customized orthodontic tube comprises two portions separated, at least in part, by a space, and the ridge comprises a first ridge and a second ridge, wherein:
a first ridge is located on a first one of the two portions; and
a second ridge is located on a second one of the two portions.
18 . The additively manufactured customized orthodontic tube of claim 17 , wherein the space separating the two portions is a stress concentrator.
19 . The additively manufactured customized orthodontic tube of claim 9 , further comprising:
multiple portions each comprising a respective slot extending through the portion.
20 . The additively manufactured customized orthodontic tube of claim 19 , wherein slots of the multiple portions are aligned such that arch wire passes through the slots of the multiple portions.