[1] Natl Taiwan Univ, Sch Dent, Grad Inst Clin Dent, Taipei 10048, Taiwan
[2] Taitung Anim Propagat Stn COA LRI, Taitung 954, Taiwan
[3] Cardinal Tien Hosp, Yung Ho Branch, Dept Dent, New Taipei City, Taiwan
[4] Natl Taiwan Univ, Sch Dent, Dept Dent, Taipei 10764, Taiwan
[5] Natl Taiwan Univ Hosp, Dept Dent, Taipei, Taiwan