Horizontal Lip Position in Twelve-Year-Old Subjects with Class I and Class II/1

Svrha je istraživanja da se na laterolateralnim rentgenogramima s pomoću linearnih varijabli, po Burstoneu i Rickettsu, utvrdi razlika strukture mekoga tkiva, s naglaskom na položaj usana, u ispitanika s klasom II/1 i klasom I te utvrde razlike navedenih varijabli s obzirom na spol. Istraživanje je provedeno na uzorku 57 rentgenograma ispitanika hrvatske populacije s klasom II/1 i klasom I u dobi od dvanaest godina. Istraživanjem se pokazalo da kod klase I kod svih pet varijabli nema razlike s obzirom na spol; kod klase II/1 pronađena je razlika s obzirom na spol; raščlambom dječaka kod klase I i II/1 pronađena je razlika u položaju gornje i donje usne prema Rickettsu i Burstoneu; raščlambom djevojčica kod klase I i II/1 nije pronađena statistički znatna razlika; te na kraju usporedbom klasa I i II/1 bez obzira na spol pronađena je razlika u položaju gornje usne prema objema linijama.The aim of the study was to define the difference of the lip position on lateral cephalograms of subjects with class I and II/1 according to Ricketts and Burstone defining the differences of the variables according to sex. The sample comprised of 57 lateral cephalograms of twelve years old boys and girls. Using measured variables statistic analysis showed following conclusions: Angle class I didn’t show any differences between females and males; class II/1 did show the differences according to sex; analysing boys between class I and II/1 differences in position of upper and lower lip are present; analysing girls between class I and II/1 differences in position of upper and lower lip are not present; comparison between classes without sex separations showes differences in position of upper lip according to both lines