The Age of Eruption of the First and Second Permanent Molar in Cameroon
Abstract:
Background: The eruption of teeth, chronologies of human dentition, dental age and tooth formation standards are important aspects applied to dental practice. Body mass index (BMI) on the other hand, gives an indication of the nutritional status of a child. Therefore, it is relevant to know if BMI influenced tooth eruption patterns of permanent first and second molars. We will determine the age of eruption of the first and second permanent molars and compare with the body mass index in a group of children from selected schools.
Materials and Methods: We conducted a cross-sectional study on 644 children aged 3 to 15 years. They were classified in Five body mass index groups. Their weights were measured with a standard scale unit in Kilogram. Height was measured with a standiometer graduated in centimeters. The BMI was calculated by dividing the weight (Kg) by the square of the height (m) to obtain a value expressed in Kilogram per square meter (Kg/m2). Values of BMI were correlated with that of the CDC growth chart for be able to tell if the child is underweight, normal weight, overweight and obese. The intraoral examination was made using a mirror. The independent t-test allowed the comparison between ages rash averages.
Results: Of 644 children, 357 (55.4%) were girls with a ratio woman: man of 1.2. The minimum eruption age for the boys was 3 years old, the age maximum 15 years old with average age of (M=5.75±1.212) for the first molar, M=12.30±0.921 for the second molar. The minimum and maximum age for girls was respectively 3 and 14 years with an average age of eruption and SD (standard deviation) M = 6.08 ± 0.973 for the first molar and M=12.18±0.804 for the second molar. The average ages were 5.6 years for the first permanent molar and 11.9 years for the second permanent molar with an interval of 95% confidence. The average ages of the first and second permanent molars have been statistically significant (p=0.00) with body mass index
Conclusion: Girls had and earlier eruption time. The mean age of eruption was 5.6years for the first permanent molars and 11.9 years for the second. We found no influence of BMI on eruption of permanent first and second molars.
