ESTIMATION OF THE MEAN ERUPTION TIME OF FIRST PERMANENT MOLARS IN THIRUVANANTHAPURAM POPULATION- A DESCRIPTIVE CROSS-SECTIONAL STUDY
Keywords:
Eruption time, irst permanent molars, Parental age, Sexual dimorphism, Socioeconomic statusAbstract
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Background: The current study aimed to ascertain the eruption timing of first permanent molars (FPMs) in children visiting a tertiary healthcare facility in Thiruvananthapuram.
Materials & Methods: A hospital-based, cross-sectional investigation was conducted on children aged 4 to 8 years who presented to the outpatient department of the tertiary health centre. A tooth was recorded as erupted if any part of crown penetrated the oral mucosa and became clinically visible. Scores 0 and 1 were considered as unerupted, and partially erupted occlusal surface, respectively. Scores 2 and 3 were deemed as fully erupted occlusal surfaces with less than half of the crown exposed and more than half of the crown exposed, respectively. Score 4 was considered as having full occlusion. Data was evaluated using SPSS Statistics. Comparison of mean age of patients with erupting molars across gender, birth type and birth weight were done using independent t- test, whereas the comparison according to body mass index, socioeconomic status, religion, and parents’ age, were done using one-way ANOVA test. A p- value <0.05 was considered the threshold for statistical significance.
Results: A total of 420 children were examined, 64 (15.3%) had unerupted, 239 (56.9%) had erupting and 117 (27.8%) had erupted permanent first molars. Mean age for eruption of the analytical sample for FPMs was 68.31months/5.7 years with a standard deviation of 6.3months/0.52 years. There was a significant difference between girls and boys with regard to the time of eruption (p<0.05), and eruption was earlier among females. However, the comparisons of mean erupting age against BMI, socioeconomic status, birth type, birth weight, religion, father’s and mother’s age were found to be statistically insignificant.
Conclusion: This study disclosed that the rapid development of the FPMs in the study population may necessitate an earlier assessment for orthodontic and preventive dental treatment requirements. Hence reconsidering the timeline for growth modification, space maintenance, and preventive dental protocols, as required.
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