**5. Conclusions**

MR sialography allows for the evaluation of function and morphology of the sublingual gland ducts. This technique appears to have many possible applications in the dental, medical, and biological fields.

**Author Contributions:** Analysis of this research data was performed by T.T. Statistical analysis was performed by T.T. and M.O. Data collection of this research was performed by T.T., M.O., N.W.-S., S.M.-T., T.J., Y.M. (Yuichi Miyamura), M.H., M.K., O.T., T.S., I.N., H.T., Y.O., D.Y. and M.S. Integration of this research was performed by Y.M. (Yasuhiro Morimoto). All authors have read and agreed to the published version of the manuscript.

**Funding:** This research received no external funding.

**Acknowledgments:** This study was supported in part by grants-in-aid for scientific research from the Ministry of Education, Science, Sports and Culture of Japan and from Kitakyushu City to Y.M.

**Conflicts of Interest:** The authors declare no conflict of interest.
