Funding for this research was provided by:
Key Scientific and Technological Project of Tianjin Health Industry (14KG132)
Text and Data Mining valid from 2018-03-05
Received: 24 December 2017
Accepted: 19 February 2018
First Online: 5 March 2018
Ethics approval and consent to participate
: The Institutional Review Board of Tianjin Stomatological Hospital, Tianjin, China (TJSKE20160412), has approved this research, registered 12 April 2016.
: The procedure for the collection of imaging data (CBCT images) was explained to the patients or legal guardians, and appropriate informed consent was obtained.
: The authors declare that they have no competing interests.
: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.