doi:

DOI: 10.3724/SP.J.1249.2013.01060

Journal of Shenzhen University Science and Engineering (深圳大学学报理工版) 2013/30:1 PP.60-65

Study on digital impression for intraoral 3D scanning


Abstract:
A novel digital impression technique for scanning the 3D morphology of teeth and soft tissue inside the oral cavity in real time is presented.Using a light tube to transmit images,the technique compressed the projection rays and imaging rays in limited space,so that shadow and light occlusion of fringe projection 3D profilometry in the intraoral measurements can be avoided. A prototype system was fabricated according to the presented principles, and experimental measurements were made to evaluate the feasibility and accuracy of the system. The results demonstrate that the proposed technique acquires good robustness and great precision with a deviation of 4 μm in 3D imaging.

Key words:computer vision,image processing,3D sensor,intraoral 3D scanning,dental scan,fringe projection,light tube,light-path compression,digital impression

ReleaseDate:2014-07-21 16:49:41

Funds:National Natural Science Foundation of China(11109052); Science and Techndogy Development Funds of Shenzhen(JC200903120031A)



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