Abstract
Purpose：Introduction of a new telementoring system for live instruction on clinical procedure.
Materials and Methods：Stereo viewer was used for monitor of 3D digital microscope. In telementoring system, surgical field dis-
played on a stereo viewer was connected remote dental instructor through the internet.
Discussion：Periodontal surgery was performed using a new telementoring system. Four conditions were considered essential in
telementoring for dentistry. 1 ) low latency, 2 ) high quality 3D video, 3 ) reference point on the surgical field（line, cursor et al）,
4 ) high security.
Conclusion: Op
