of;
Prosthodontics,;
The;
First;
Affiliated;
Hospital,;
Sun;
Yat;
Sen;
University,;
Guangzhou,;
China;
of;
Prosthodontics,;
The;
Third;
Affiliated;
Hospital,;
Sun;
YatSen;
University,;
Guangzhou,;
China;
and;
of;
Stomatology,;
Taishan;
People's;
Hospital,;
Taishan,;
China;