| Abstract | Ciljevi su bili slijedeći: utvrditi podudarnosti dentalne i kronološke dobi, razvoj i položaj umnjaka, gornijih očnjaka, sjekutića, donjih pretkutnjaka i umnjaka, rotacije lica i pojedine čeljusti, sagitalne i vertikalne odnose čeljusnih baza i baze lubanje, utjecaj vrste okluzije na mandibularnu asimetriju, estetika profila lica, spolne razlike i razlike u razvoju denticije. Raščlamba je vršena na ortopantomogramskim i LL telerendgenskim snimkama. Podaci su statistički obrađeni pomoću 2 Pearson testa i Fisher egzaktnog testa. U istraživanju je bilo 146 ispitanika porijeklom iz Zagreba i Istre; s klasom II/2 77, a s klasom III 69; prema denticiji podijela je u dvije grupe: s ranim stadijem mješovite denticije (23 s klasom II/2 i 21 s klasom III) i s kasnim stadijem razvoja denticije (54 s klasom II/2 i 48 s klasom III). Kronološka dob cijelog uzorka iznosi 9,8±1,8 godina, dentalna dob 9,6±2,3 godina, te postoji značajna nepodudarnost u korist kronološke dobi ( p=0,028 ), to je zbog slabije mineralizacije zuba donje čeljusti kod klase II/2 ( r=-0,171 ). Zametci gornjih umnjaka su statistički značajnije prisutni u klasi II/2 u maksili, a donji u klasi III, smjer nicanja gornjih umnjaka je nepovoljniji kod klase III, a donjih kod klase II/2, položaj zametaka očnjaka nema značajnosti između klase II/2 i klase III, zabilježen je manji kut aksijalne osovine s okluzalnom plohom kod klase III u ranoj mješovitoj denticiji. Udaljenost gornjih očnjaka od okluzalne ravnine ne pokazuje statističku značajnost među klasama. Značajno veći stupanj mineralizacije gornjih očnjaka, a manji donjih pretkutnjaka u klasi II/2, indeks asimetrije ne pokazuje razlike u klasama. Horizontalne vrijednosti su značajne među klasama, vrijednost PtmA% povezana je s prisutnošću zametaka umnjaka. Vertikalne vrijednosti značajno se razlikuju među klasama, osim vrijednosti NS%, a značajnosti među spolovima nema. |
| Abstract (english) | The objectives were as follows: to determine the congruence of dental and chronological age, development and position of third molars, upper canines, incisors, lower premolars and third molar, face rotation, and each jaw, sagittal and vertical jaw base and the base of the skull, the influence of occlusion type on the mandibular asymmetry, esthetics of the facial profile, gender differences and differences in the development of the dentition. The analysis was performed on the ortopantomographs and LL profile teleradiographs recordings. The data were statistically analyzed using 2 Pearson test and Fisher exact test determine statistical significance in differences. The study comprised 146 examiners origin from Zagreb and Istra; 77 with Class II/2, and 69 with Class III. According to development of dentition the examiners were divided into two groups: the early stage of mixed dentition (23 with Class II/2 and 21 with Class III) and with late stage development of the dentition (54 with Class II/2 and 48 with class III). Chronological age of the entire sample is 9,8 ± 1,8 years, dental age of 9,6 ± 2,3 years, and there is a significant discrepancy in favor of chronological age (p = 0,028), this is due to poor mineralization of mandibular teeth in Class II/2 (r = -0,171). The germs of the upper wisdom teeth were statistically significant presence in the class II/2 in the maxilla, and lower in class III. The direction of the upper third molar eruption was worse in Class III and lower in Class II/2. The position of canine germs has no significance between the Class II/2 and Class III. There was a smaller angle with the axial shaft of the occlusal plane in Class III in the early mixed dentition. The distance of upper canines from the occlusal plane does not show statistical significance among the classes. There was significantly higher degree of mineralization of the upper canines and lower degree of the lower premolars in class II/2. The index of asymmetry does not show differences in the classes. Horizontal values are significant among the classes. The value PtmA% is connected with the presence of third molar germs. Vertical values are significantly different among the classes, except the value of NS%, and there was no significance between the sexes. |
