| Abstract [eng] |
The prevalence of the problem: Changes in eruption path is one of the reasons to extract primary molars early for angulated premolars to erupt correctly. Uneven root resorption of treated primary teeth might be a reason for the change in angulation, if so, it is significant to know whether endodontic or restorative treatment of primary teeth can influence the inclination angle of premolar bud to detect eruption problems early. The aim of the study: To determine whether endodontic or restorative treatment of deciduous molars has effect on developing premolar teeth inclination angle. Objectives of the study: 1. To determine the premolar bud’s inclination angle under endodontically treated primary molars in panoramic x-ray. 2. To determine the premolar bud’s inclination angle under restoratively treated primary molars in panoramic x-ray. 3. To determine the premolar bud’s inclination angle under untreated primary molars in panoramic x-ray. 4. To compare the premolar bud’s inclination angle under treated and untreated primary molars in panoramic x-ray. Material and methods: 93 Panoramic X-rays, done from 2022 to 2023 year from Vilnius University Zalgiris Hospital database were selected to form three groups: group 1(G1) - 31 patients with endodontically treated deciduous molars, group 2 (G2) 31 patients with dental filling on deciduous molars, (control group CG) 31 patients with healthy deciduous molars. In all groups only mandibular teeth were included. Premolars germs inclination was measured according to the long axis of the primary tooth and the angle between primary tooth and permanent tooth long axes was measured. Comparisons between healthy and affected sides in G1, G2 and CG were made. Statistical analysis was performed using ,,Microsoft Excel“ and SPSS v. 29.0 software using ,,one – way Anova“ and ,,Turkey‘s post – hoc“ tests with a significance level set at 5% (p<0,05). Results: 159 mandibular teeth in total of the patients from 6 to 13 years were included: 53 teeth in each group respectively with a Nolla development stage of 6 and 7. The inclination angle in G1 and G2 was significantly larger compared to the CG (p=0,012) - the mean inclination angle in G1 was 13.4 degrees, in G2 – 12.15 and in CG – 1.19 degrees. No statistically significant difference between premolar germs inclination angle and patients age (p>0,05) was found. Conclusions: The inclination angle of developing mandibular premolar was significantly larger if the deciduous molar has been treated endodontically or restored with dental filling. For this reason it is important to observe premolar teeth before they erupt. |
