Relapse prevention retainer
Apparatuses and methods for customized retainers to prevent relapse. In particular, described herein are customized retainers, and methods and apparatuses for making customized retainers that specifically reenforce and prevent movement of one or more teeth having a higher likelihood of relapse following completion of an orthodontic treatment plan.
1 . A method of creating a retainer for a patient, the method comprising:
estimating a stability estimate for one or more of the patient's teeth from a model of the patient's teeth and a current orthodontic treatment plan for the patient, wherein the stability estimate corresponds to a likelihood that the one or more of the patient's teeth will move out of a target final position from the current orthodontic treatment plan; and
generating a model of the retainer, wherein the retainer is reinforced in one or more regions configured to be in communication with the one or more of the patient's teeth in which the stability estimate exceeds a threshold.
2 . The method of claim 1 , wherein the model of the retainer is a digital model.
3 . The method of claim 1 , where estimating comprises using one or more prior treatment plans specific to the patient in addition to the current orthodontic treatment plan for the patient to estimate a final post-treatment relapse position for the one or more of the patient's teeth.
4 . The method of claim 1 , further comprising forming the retainer from the model of the retainer.
5 . The method of claim 1 , wherein estimating the stability estimate comprises using a machine-learning algorithm trained on a plurality of treatment plans and tooth models.
6 . The method of claim 1 , wherein estimating comprises estimating a plurality of stability estimates, wherein each stability estimate corresponds to a different tooth of the patient's teeth.
7 . The method of claim 1 , further comprising, for each stability estimate that exceeds the threshold, determining a force vector corresponding to a movement of the one or more of the patient's teeth beyond the target final position.
8 . The method of claim 7 , wherein generating the model of the retainer comprises including reinforcement to counter the force vector.
9 . The method of claim 1 , wherein estimating the stability estimate for one or more of the patient's teeth comprises estimating the stability estimate for one or more of: diastema relapse and general spacing relapse, anterior or posterior mesial/distal or buccal/lingual or rotational relapse, lingual crown tip in/buccal crown tip out, deep bite relapse, extrusion/intrusion relapse, arch expansion relapse and/or extraction, Class II treatment relapse, and Class III treatment relapse.
10 . The method of claim 1 , wherein generating the model of the retainer comprises including reinforcement of the one or more regions by making the retainer thicker, stiffer and/or having a longer trim line in the one or more regions configured to be in communication with the one or more of the patient's teeth.
11 . The method of claim 1 , wherein generating the model of the retainer comprises including reinforcement of the one or more regions by including a strut or the retainer thicker in the one or more regions configured to be in communication with the one or more of the patient's teeth.
12 . The method of claim 1 , wherein generating the model of the retainer comprises including reinforcement of the one or more regions so that the retainer applies a force on the one or more of the patient's teeth in which the stability estimate exceeds a threshold to overcorrect the one or more of the patient's teeth.
13 . A computer-implemented method of custom designing a retainer for a patient, the method comprising:
estimating, in a processor, from a model of the patient's teeth, a current orthodontic treatment plan for the patient, a stability estimate for one or more of the patient's teeth, wherein the stability estimate corresponds to a likelihood that the one or more of the patient's teeth will move beyond a target final position from the current orthodontic treatment plan in one or more relapse categories including: diastema relapse and general spacing relapse, anterior or posterior mesial/distal or buccal/lingual or rotational relapse, lingual crown tip in/buccal crown tip out, deep bite relapse, extrusion/intrusion relapse, arch expansion relapse and/or extraction; and
generating a model of the retainer, wherein the retainer is modified in one or more regions configured to be in communication with the one or more of the patient's teeth in which the stability estimate exceeds a threshold.
14 . A non-transitory computer-readable medium including contents that are configured to cause one or more processors to perform a method comprising:
estimating, from a model of the patient's teeth and a current orthodontic treatment plan for a patient, a stability estimate for one or more of the patient's teeth, wherein the stability estimate corresponds to a likelihood that the one or more of the patient's teeth will move out of a target final position from the current orthodontic treatment plan; and
generating a model of a retainer, wherein the retainer is reinforced in one or more regions configured to be in communication with the one or more of the patient's teeth in which the stability estimate exceeds a threshold.
15 . The non-transitory computer-readable medium of claim 14 , where estimating comprises using one or more prior treatment plans specific to the patient in addition to the current orthodontic treatment plan for the patient to estimate a final post-treatment relapse position for the one or more of the patient's teeth.
16 . The non-transitory computer-readable medium of claim 14 , wherein the contents are further configured to cause the one or more processors to form the retainer from the model of the retainer.
17 . The non-transitory computer-readable medium of claim 14 , wherein estimating the stability estimate comprises using a machine-learning algorithm trained on a plurality of treatment plans and tooth models.
18 . The non-transitory computer-readable medium of claim 14 , wherein estimating comprises estimating a plurality of stability estimates, wherein each stability estimate corresponds to a different tooth of the patient's teeth.
19 . The non-transitory computer-readable medium of claim 14 , wherein the contents are further configured to cause the one or more processors to determine, for each stability estimate that exceeds the threshold, a force vector corresponding to a movement of the one or more of the patient's teeth beyond the target final position.
20 . The non-transitory computer-readable medium of claim 19 , wherein generating the model of the retainer comprises including reinforcement to counter the force vector.
21 . The non-transitory computer-readable medium of claim 14 , wherein estimating the stability estimate for one or more of the patient's teeth comprises estimating the stability estimate for one or more of: diastema relapse and general spacing relapse, anterior or posterior mesial/distal or buccal/lingual or rotational relapse, lingual crown tip in/buccal crown tip out, deep bite relapse, extrusion/intrusion relapse, arch expansion relapse and/or extraction, Class II treatment relapse, and Class III treatment relapse.
22 . The non-transitory computer-readable medium of claim 14 , wherein generating the model of the retainer comprises including reinforcement of the one or more regions by making the retainer thicker, stiffer and/or having a longer trim line in the one or more regions configured to be in communication with the one or more of the patient's teeth.
23 . The non-transitory computer-readable medium of claim 14 , wherein generating the model of the retainer comprises including reinforcement of the one or more regions by including a strut or the retainer thicker in the one or more regions configured to be in communication with the one or more of the patient's teeth.
24 . The non-transitory computer-readable medium of claim 14 , wherein generating the model of the retainer comprises including reinforcement of the one or more regions so that the retainer applies a force on the one or more of the patient's teeth in which the stability estimate exceeds a threshold to overcorrect the one or more of the patient's teeth.
25 . A non-transitory computer-readable medium including contents that are configured to cause one or more processors to perform a method comprising:
estimating, in a processor, from a model of the patient's teeth, a current orthodontic treatment plan for a patient, a stability estimate for one or more of the patient's teeth, wherein the stability estimate corresponds to a likelihood that the one or more of the patient's teeth will move beyond a target final position from the current orthodontic treatment plan in one or more relapse categories including: diastema relapse and general spacing relapse, anterior or posterior mesial/distal or buccal/lingual or rotational relapse, lingual crown tip in/buccal crown tip out, deep bite relapse, extrusion/intrusion relapse, arch expansion relapse and/or extraction; and
generating a model of a retainer, wherein the retainer is modified in one or more regions configured to be in communication with the one or more of the patient's teeth in which the stability estimate exceeds a threshold.