Horseshoe-shaped intraoral tray type scanning head with omni-directional camera shooting

Abstract

In view of the shortcomings of a conventional method for producing a digital impression by a direct intraoral scanning method, the invention provides a horseshoe-shaped intraoral tray type scanning head with omni-directional camera shooting, and is characterized in that the horseshoe-shaped intraoral tray type scanning head is horseshoe-shaped without touching soft palate, and the type can be selected according to the size of a dental arch; a plurality of detachable optical cameras are embedded in the outer side, the inner side and the bottom of a tray, and scanning areas of each two cameras are partially overlapped (shown in Figure 1) to ensure the accuracy and integrity of data; the appropriate number of cameras can also be selectively arranged to scan local dentition: the tray is put directly into a mouth in place, and complete oral soft and hard tissue data can be quickly collected without a mobile head. At the same time, the data can be compared with the internal situation of theoral cavity in real time, and the mobile head can supplement scanning after a blind area is found. The invention aims to optimize the performance of a traditional intraoral scanning head, the accurateand complete oral digital model is provided by integrating multiple cameras, the diagnosis and treatment safety is effectively improved, the costs are saved, and the environmental protection is facilitated.

Description

technical field [0001] The present invention relates to a digitized intraoral scanning head, in particular to a horseshoe-shaped tray-type intraoral scanning head with omnidirectional cameras, in which several optical cameras are embedded. 5 cameras, 5 cameras at the bottom, there is a corresponding overlapping area between each two cameras; in addition, the cameras can be disassembled and installed according to the clinical diagnosis and treatment situation, and the tray-type scanning head can be quickly placed in the patient's mouth Accurately obtain complete dentition data. Background technique [0002] Digital technologies in the dental field include digital impressions, digital diagnosis and treatment, digital production, digital surgical navigation, imaging and the application of related materials. Among them, digital impression technology is the premise and foundation of digital diagnosis and treatment. It provides a complete and accurate oral digital model for diagn...

AI Technical Summary

Problems solved by technology

Although the space in the oral cavity is small, it still needs to solve the problem of "large field of view" splicing, which is a key factor affecting high-precision measurement in optical scanning. The single-view field of view is often small. In order to obtain relatively complete 3D data of oral soft and hard tissues, a large number of multi-field 3D data stitching processes are required, and the more times of stitching, the lower the data accuracy.

In addition, when the indirect method scans the model, the scanning base is stable and fixed, and the relative spatial position of the scanned model and the scanner space coordinate system is stable. However, in the traditional intraoral scanning process, any involuntary movement of the patient's jaw position, tiny head and Tongue movement, slight secretion of saliva, gingival sulcus bleeding, etc. will greatly reduce the quality of the obtained image; there is no relatively stable positional relationship with the scanner, and the multi-field stitching data is mainly realized by software algorithms. The data overlapping rate of the field of view puts forward high requirements, and the scanning speed and accuracy are greatly limited; at the same time, the average time for the operator to use intraoral scanning is long, and the proficiency of using the scanning head and the trajectory of the scanning head affect the accuracy of scanning

In the process of scanning from the front teeth to the back teeth, because the canines are located at the corners of the mouth, there are turning points during scanning, and it is more difficult to capture the picture of them than other teeth, and it is easy to appear in the process of image splicing. stitching error

Therefore, the larger the scanning range, the larger the span of images taken by the scanning system, and the more complicated the process of converting two-dimensional images into three-dimensional images, resulting in greater deviation between the obtained digital impression image and the original state of the mouth. Difficulty with molded removable partial dentures, restorations such as bridges over 5 units

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