Center;
of;
Digital;
Dentistry,;
Peking;
University;
School;
and;
Hospital;
of;
Stomatology;
&;
National;
Engineering;
Laboratory;
for;
Digital;
and;
Material;
Technology;
of;
Stomatology;
&;
ResearchCenter;
of;
Engineering;
and;
Technology;
for;
Digital;
Dentistry,;
Ministry;
of;
Health,;
Beijing,;
China;