The relationship between body mass index (BMI) and dental caries (dmft) and simulation of mechanical properties of lithium disilicate restoration

Subject Areas : Journal of Simulation and Analysis of Novel Technologies in Mechanical Engineering

Behnoush Selahbarzin ¹ , Yaser Mokhaieri ² , Kowsar Mollai ³

1 - Assistant Professor of Pediatric Dentistry, Department of Pediatrics, School of Dentistry, Lorestan University of Medical Sciences, Khorramabad, Iran
2 - Department of Epidemiology and Biostatics, Lorestan University of Medical Sciences, Khorramabad, Iran
3 - School of Dentistry, Lorestan University of Medical Sciences, Khorramabad, Iran

Received: 2022-05-26 Accepted : 2022-07-29 Published : 2022-06-01

Keywords: Simulation, Restoration, BMI, dmft index, Tooth decay,

Abstract :

Tooth extract is a chronic disease affecting a large number of people, especially children. Due to the high rate of tooth decay and the effect of nutrition and obesity on dental caries, this paper aims to investigate the relationship between body mass index (BMI) and dental caries (dmft) in children. This descriptive-analytical study was performed on a sample of 232 children age 6 to 9 years referred to Khorramabad Dental School in the academic year 2020-2021. The height, weight and BMI were measured for all children and their dmft score was determined based on the criteria of standards defined by the World Health Organization (WHO) and the data were analyzed using STATA 14 software. The obtained results showed that the mean age of students was 7.351±0.07 years, their BMI was 15.39 ± 2.81 and their dmft was 5.51 ± 2.8 are underweight, 26.29% are normal weight, 12.5% ​​are overweight and 6% are fat. Moreover, in this research molecular dynamics (MDs) simulation was used to predict the physical and mechanical properties of lithium disilicate as a restorative material. According to the experimental results, the mean dmft index in Khorramabad students is high and programs should be considered to control dental caries and reduce them. Regarding the relationship between dmft and BMI, contradictory results were obtained that due to the multifactorial nature of caries and obesity, the relationship between the two is complex and needs further investigation. The average density value of the simulated model of lithium disilicate is 2.551 at 300 K and 2.479 gr/cm3 at 450 K, which is very close to the real value of 2.6 ± 0.3 gr/cm3. The obtained results from the MDs showed that it is in good agreement with the experimental observation.