engleski

Correlation of chronological and dental age among children with different malocclusions

OBJECTIVES: For the orthodontic treatment planning and successful orthodontic results with long term stability, it is mandatory to determine both chronological and dental age of the patient. The aim of this research was to compare chronological and dental age of patients with class II division 2 and class III malocclusions among Croatian children. METHODS: Subjects from Zagreb and Istria county were included in this research. The sample was derived from the records of orthodontic patients. The inclusion criteria were as follows: free from any systemic disease ; no dental anomalies (missing teeth, impaction, trans- position) ; no extractions of permanent teeth (third molars were not considered part of the dentition) ; no history of orthodontic treatment ; no history of trauma of teeth and face. According to the stage of dentition, the subjects were divided into two groups. Group 1 included subjects with an early stage of mixed dentition, and group 2 included subjects with late stage of mixed dentition. The distribution of the subjects is shown in Table 1. The assessment of dental age was evaluated from panoramic radiographs by Demirjian’s method. RESULTS: In Group 1, there were no statistically significant differences found between chronological and dental age (r=0.118). In Group 2, results showed statistically significant correlation between chronological and dental age (r=0.580). Patients in this group were approximately the same chronological, as well as dental age. In terms of malocclusion, among patients with class II/2 in Group 1 there was no statistically significant correlation between chronological and dental age. On the contrary, in Group 2 correlation of these variables was statistically significant (r=0.457). Patients with class III, in Group 1 as well as in Group 2, showed statistically significant correlation of chronological and dental age (r=0.522 - Group 1, r=0.726 - Group 2). According to gender, results showed greater dental age compared to chronological age among male children with class II/2 malocclusion (Figure 1). CONCLUSION: It was concluded that children in the early stage of mixed dentition with class II/2 malocclusion showed no statistically significant correlation between chronological and dental age. Meanwhile, those patients with class II/2 in late stage of mixed dentition and those with class III in early, along with those in late stage of mixed dentition showed statistically significant correlation between chronological and dental age.

chronological age ; dental age ; malocclusion

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