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Dentometric Characteristics of Examinees with Primary Crowding

Vesna Gaži-Čoklica ; Stomatološki fakultet Sveučilišta u Zagrebu, Zagreb, Hrvatska
Asja Miličić ; Stomatološki fakultet Sveučilišta u Zagrebu, Zagreb, Hrvatska
Mladen Šlaj ; Stomatološki fakultet Sveučilišta u Zagrebu, Zagreb, Hrvatska
Sonja Gabrić ; Stomatološki fakultet Sveučilišta u Zagrebu, Zagreb, Hrvatska
Senka Rajić ; Stomatološki fakultet Sveučilišta u Zagrebu, Zagreb, Hrvatska

Sažetak

A comparative study of dentometric characteristics of incisors in the upper and lower jaws was performed in on attempt to determine the role of the size of the mentioned teeth in the process of primary crowding. The study included 200 examinees (140 females and 60 males) with primary crowding and 100 eugnathic subjects (48 females and 52 males) as a control group. The sample was selected according to the following criteria: anterior crowding, completed exchange of
teeth, neutral intermaxillary relationship (Angle class I), lack of other malocclusion. The age was limited to 14 years in order to avoid the possible influence of tertiary crowding. The study was carried out by means of a sliding-caliper with 1 mm precision on plaster casts of the upper and lower jaws, and the mesiodistal diameters of all the four permanent incisors in the upper and lower jaws were measured. After statistical analysis and interpretation of the results, the following was concluded: Arithmetical means of the sums of the upper incisors were
considerably higher in boys, while the difference between the mean
values of the sums of the lower incisors was insignificant. The subjects with crowding had significantly bigger upper but not lower incisors. One of the important factors for the occurrence of crowding
were bigger incisors, especially the upper central ones, and in girls also the lower incisors. The size of the incisors should by no means be taken as the only cause o f crowding, as demonstrated by the analysis of the widths and heights o f the upper dental arch. Significantly smaller widths of dental arches in the premolar and molar regions, along with an increase in the anterior upper height were registered in the subjects with crowding. The analysis of correlations revealed only a slight association between the size o f incisors, especially the upper ones, and the widths and anterior heights of the upper dental arch, possibly indicating a very low correlation or the lack o f correlation among the factors inducing crowding, i.e. increase in the size of incisors, and a narrower and longer upper dental arch.

Ključne riječi

primary crowding; permanent dentition; odontometry; dimensions of incisors

Hrčak ID:

100549

URI

https://hrcak.srce.hr/100549

Datum izdavanja:

15.12.1993.

Podaci na drugim jezicima: hrvatski

Posjeta: 939 *