Evaluation of overjet and overbite changes after replacing SSC on the primary molars of children between 3-6 years old

Abstract

Background and goal: According to the importance of SSC coatings in durability of primary teeth treatment compared to multilayer amalgam and other restorative materials, systematic study of these coatings from various aspects such as orthodontic changes, periodontal changes and so on is important. Awareness of the factors that influence SSC coatings and pediatric dentistry can improve treatment plans and outcomes. Since no coherent study has been performed so far to investigate the occlusion changes resulting from these coatings, this research investigates these changes. Materials and Methods: In this descriptive-analytical research, 52 patients referred to the Tabriz Dentistry Pediatric Department in 2018 were studied. Sample size was determined using pilot study results. Investigations were conducted in two time intervals T0 and T1. The time interval T0 was before coating placement and the time interval T1 was immediately after SSC coating placement in patients. Over-jet and overbite changes were measured using a digital caliper by a pediatric dentist on both occasions. The results were reported using descriptive statistics (mean, SD, frequency and percent). Paired t-tests were used to compare the changes. Comparison of occlusion changes by sex and age groups were evaluated by independent t-test and one-way ANOVA respectively. Significance level was considered P <0.05 and statistical analysis was performed using SPSS17 software. Findings: The study of over-jet and overbite changes showed that the average over-jet changes were 0.1 mm and the mean overbite changes were 0.23. The least change in both overbite and over-jet patients was the same equal to zero. In general, regardless of gender, patients’ overbite changes were significantly higher than their over-jet changes (P = 0.041). Follow-up analysis of patients showed that over-bit changes were significantly higher in girls than in boys (P = 0.034) in terms of gender, but in over-jet, these changes were not significant (P> 0.05). Results: The patients’ overbite changes were significantly more than their over-jet changes. With regard to gender of patients, the overbite changes in girls were significantly more than boys, but in over-jet, these changes were not significant.