Method for building three-dimensional tooth-and-jaw fusion model

A technology that integrates models and jaws, applied in teaching models, dentistry, articulators, etc., can solve problems such as affecting clinical results, soft tissue data distortion, errors, etc., to save clinical work time, manpower and material resources, and reduce CT image errors. , the effect of reducing the number of registrations

CN105919684AInactive Publication Date: 2016-09-07穆檬檬
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2016-09-07
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a method for building a three-dimensional tooth-and-jaw fusion model. The method includes the steps that data is collected in the occlusion state, and a skull CT image is rebuilt, laser scanning of a gypsum occlusion model is subjected to digital processing; picture processing and the image matching function are based on a reverse engineering software Geomagic Studio, a method based on point matching and the iterative algorithm are combined in the reverse engineering software, a gypsum dentition occlusion model and CT rebuilt dentitions are matched, indistinct CT rebuilt dentitions are replaced, and finally, the three-dimensional tooth-and-jaw fusion model matched in the occlusion state that a CT rebuilt jaw model and the gypsum dentition occlusion model are integrated is obtained. CT imaging artifacts caused by intraoral metal and the error, caused by upper-and-lower-jaw dentition overlapping in the occlusion state, between the occlusion relationship and the practical intraoral occlusion position in the fusion model are reduced, and therefore the accuracy of computer aided design and the treating effect are improved.
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Description

technical field

[0001] The invention belongs to the technical field of digital modeling, and in particular relates to a method for establishing a three-dimensional tooth-jaw fusion model. Background technique

[0002] The three-dimensional dento-jaw fusion model is a digital model composed of at least two different imaging techniques in three-dimensional space, including organizational structures such as dentition, occlusal and maxillofacial bones.

[0003] When metal restorations and orthodontic brackets are present, CT images show striated objects and prevent accurate identification of tooth morphology. The dentition needs to be replaced with an optimally simulated upper and lower occlusal relationship and a treatment plan completed. Traditional plaster casts were used to represent the exact dentition and prepare surgical splints. A large number of studies have reported methods for integrating maxillofacial bone models and digital dental models, so that bones, teeth, and...

Examples

Embodiment Construction

[0035] The present invention is further described below in conjunction with accompanying drawing.

[0036] A method for establishing a three-dimensional dento-jaw fusion model, comprising the following steps:

[0037] 1) Data acquisition, put the ironed and cut horseshoe-shaped wax sheet into the patient's mouth, bite, that is, use the wax sheet to record the patient's occlusal position, which is the common and unique occlusal position of the image data and model data; relax the facial soft tissue , take head CT in the above occlusal state, and complete the collection of image data; perform conventional intraoral silicone rubber impression material on the patient to make an impression, perfuse the plaster model, and use the above wax slice to determine the occlusal relationship of the plaster model to complete the collection of model data;

[0038] 2) Image data processing, import the cranial CT file described in step 1) into Mimics, reconstruct the three-dimensional images of...