Orthodontic front and back palatal plica registration method and equipment

Abstract

The invention provides an orthodontic front and back palatal plica registration method and equipment, and the method comprises the steps: obtaining a plaster model of the oral palate of a patient before and after treatment, and scanning and storing the plaster model through a model scanner; digging out the palatal folds and the surrounding area in the scanned plaster model of the oral palate through a processor, converting the palatal folds and the surrounding area into point clouds, and automatically extracting the palatal folds through the processor; overlapping the palatal fold point clouds before and after treatment by adopting an iterative nearest point algorithm introducing maximum correlation entropy measurement through a processor to obtain three-dimensional space transformation parameters, and establishing a space rectangular coordinate system of an overlapping model; overlapping the three-dimensional space transformation parameters with the original model containing the teeth, and calculating the three-dimensional distance of the corresponding mark point of each tooth and the angle of the tooth long axis in the three-dimensional direction to realize the registration of the palatal fold orthodontic correction; and reducing personal errors in the gypsum model preparation process and the palatal fold extraction process by introducing the maximized correlation entropy measurement, so that the registration accuracy is improved.

Description

technical field [0001] The invention relates to the technical field of biology and new medicine, in particular to a registration method and equipment for orthodontic anterior and posterior palatal folds. Background technique [0002] With the rapid development of orthodontics today, more and more patients are seeking orthodontic treatment. More than 300,000 patients receive orthodontic treatment every year, and this number is still increasing. Orthodontic technology is constantly innovating and improving, from the previous square wire arch appliance to the straight wire arch appliance, from the traditional four-wing bracket to the self-locking bracket. In recent years, the development of invisible aligners without brackets has been rapid, and the orthodontic technology has been improved again and again. Orthodontists have more choices in the treatment process. Each orthodontic device has its advantages and disadvantages. key considerations in device selection. The core of ...

AI Technical Summary

Problems solved by technology

[0012] Aiming at the problem in the prior art that the registration of palatal folds is failed due to errors caused by manual picking of palatal folds, the present invention provides a registration method and equipment for orthodontic anterior and posterior palatal folds, using iterative closest point algorithm, through The introduction of the maximum correlation entropy measure reduces the human error in the plaster model preparation process and the palatal fold extraction process, and improves the accuracy of registration

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