Technologies for merging three-dimensional models of dental impressions
Technologies for merging three-dimensional models of dental impressions include a computing device that generates multiple three-dimensional models that are each indicative of a dental impression of a user's dental arch. The models may be generated by scanning the dental impressions. The computing device determines whether a model is indicative of the complete anatomy of the user's arch and, if not, merges multiple models with a merge strategy to generate a merged model. The models may be merged by aligning geometry of the models, selecting geometry from one of the models using the merge strategy, and generating the merged model that includes the selected geometry. The merge strategy may include selecting from the model associated with the dental impression that includes the most detail of the user's anatomy or selecting from the model with the greatest depth.
1. A computing device for dental impression scan merging, the computing device comprising:
a model manager configured to generate a first model and a second model, the first model comprising a three-dimensional model indicative of a first dental impression of a dental arch of a user, the second model comprising a three-dimensional model indicative of a second dental impression of the same dental arch of the user;
a merge manager configured to merge the first model and the second model, wherein merging the first model and the second model comprises:
selecting a geometry of the first model or a geometry of the second model, the geometry of the first model and the geometry of the second model being associated with a common feature in the dental arch of the user; and
generating a merged model that includes the selected geometry; and
a manufacturing manager configured to use the merged model for manufacturing a dental aligner specific to the dental arch of the user and being configured to reposition one or more teeth of the user.
2. The computing device of claim 1 , wherein:
the model manager is further configured to generate a third model that comprises a three-dimensional model indicative of a third dental impression of the dental arch of the user; and
the merge manager is further configured to generate a second merged model by merging the first model, the second model, and the third model.
3. The computing device of claim 1 , wherein merging the first model and the second model further comprises:
aligning the geometry of the first model and the geometry of the second model;
selecting geometry of the first model to include in the merged model; and
selecting geometry of the second model to include in the merged model, wherein the geometry of the second model completes an incomplete part of the first model; and
wherein generating the merged model includes the selected geometry of the first model and the selected geometry of the second model.
4. The computing device of claim 1 , wherein selecting the geometry of the first model or the geometry of the second model comprises:
determining whether the first dental impression includes more detail at the common feature than the second dental impression; and
selecting the geometry of the first model based on the first dental impression including more detail at the common feature.
5. The computing device of claim 1 , wherein selecting the geometry of the first model or the geometry of the second model comprises:
determining whether the first model includes greater depth at the common feature than the second model; and
selecting the geometry of the first model based on the first model including greater depth at the common feature.
6. The computing device of claim 5 , wherein determining whether the first model includes greater depth comprises determining whether the first dental impression includes an impression from a tip of a tooth to a gingival line.
7. The computing device of claim 5 , wherein determining whether the first model includes greater depth comprises determining a distance from a bottom of the first dental impression corresponding to a tip of a tooth to a top of the first dental impression corresponding to a surface of a dental impression mixture.
8. The computing device of claim 1 , wherein merging the first model and the second model further comprises cleaning the merged model to generate a closed surface.
9. The computing device of claim 1 , wherein merging the first model and the second model further comprises generating a plurality of merged models.
10. The computing device of claim 9 , wherein the merge manager is further configured to select a particular merged model from the plurality of merged models.
11. The computing device of claim 1 , wherein:
generating the first model comprises receiving a scan of the first dental impression; and
generating the second model comprises receiving a scan of the second dental impression.
12. A method for dental impression scan merging, the method comprising:
generating, by a computing device, a first model and a second model, the first model comprising a three-dimensional model indicative of a first dental impression of a dental arch of a user, the second model comprising a three-dimensional model indicative of a second dental impression of the same dental arch of the user;
merging, by the computing device, the first model and the second model, wherein merging the first model and the second model comprises:
selecting a geometry of the first model or a geometry of the second model, the geometry of the first model and the geometry of the second model being associated with a common feature in the dental arch of the user; and
generating a merged model that includes the selected geometry; and
manufacturing a dental aligner based on the merged model, the dental aligner being specific to the dental arch of the user and being configured to reposition one or more teeth of the user.
13. The method of claim 12 , wherein selecting the geometry of the first model or the geometry of the second model comprises:
determining whether the first dental impression includes more detail at the common feature than the second dental impression; and
selecting the geometry of the first model based on the first dental impression including more detail at the common feature.
14. The method of claim 12 , wherein selecting the geometry of the first model or the geometry of the second model comprises:
determining whether the first model includes greater depth at the common feature than the second model; and
selecting the geometry of the first model based on the first model including greater depth at the common feature.
15. The method of claim 14 , wherein determining whether the first model includes greater depth comprises determining whether the first dental impression includes an impression from a tip of a tooth to a gingival line.
16. The method of claim 14 , wherein determining whether the first model includes greater depth comprises determining a distance from a tip of a tooth in the dental impression to a surface of a dental impression mixture.
17. The method of claim 14 , wherein determining whether the first model includes greater depth comprises:
combining the first model and the second model into multiple layers; and
identifying lower points from the multiple layers, the lower points corresponding to the selected geometry.
18. The method of claim 12 , wherein merging the first model and the second model further comprises:
aligning the geometry of the first model and the geometry of the second model using one or more points of the first model and of the second model;
selecting geometry of the first model to include in the merged model; and
selecting geometry of the second model to include in the merged model, wherein the geometry of the second model completes an incomplete part of the first model; and
wherein the merged model includes the selected geometry of the first model and the selected geometry of the second model.
19. A method for dental impression scan merging, the method comprising:
generating, by a computing device, a first model and a second model, the first model comprising a three-dimensional model of an initial dental impression of a dental arch of a user, the second model comprising a three-dimensional model of a redundant dental impression of the same dental arch of the user;
merging, by the computing device, the first model and the second model, wherein merging the first model and the second model comprises aligning one or more common points of the first model and of the second model;
manufacturing a dental aligner based on the merged model, the dental aligner being specific to the dental arch of the user and being configured to reposition one or more teeth of the user.
20. The method of claim 19 , further comprising scanning the initial dental impression and the redundant dental impression with a scanning device to acquire information necessary to generate the first model and the second model.