[1] Dent Practice, Wojciecha z Brudzewa 10, PL-51601 Wroclaw, Poland
[2] Wroclaw Med Univ, Oral Surg Dept, Krakowska 26, PL-50425 Wroclaw, Poland
[3] Tech Univ Dresden, Dept Orthodont, D-01307 Dresden, Germany
[4] Wroclaw Med Univ, Preclin Res Ctr, Bujwida 44, PL-50345 Wroclaw, Poland
[5] Wroclaw Med Univ, Dept Pediat Dent & Preclin Dent, Krakowska 26, PL-50425 Wroclaw, Poland