Time and Eruption Sequence of Permanent Teeth in Hyderabad Children: A Descriptive Cross-sectional Study

Abstract

ContextEruption of teeth is influenced by various factors. Very few studies were carried out in the past on the eruption time of teeth in the Indian population.AimThe aim of the study is to determine the time and sequence, gender differences, pattern of symmetry in the eruption of permanent teeth in Hyderabad children.Materials and methodsIn this cross-sectional study, 1654 schoolchildren (806 girls and 848 boys) in the age group of 5 to 15 years from Hyderabad were examined for the status of eruption of permanent teeth.Statistical analysis usedResults were subjected to probit’s regression analysis. The average age at eruption of permanent teeth, excluding third molars, was given as the mean [± standard deviation (SD)] in months for each gender. A table of percentiles of the eruption time was also determined.ResultsUnlike most of the earlier studies which showed that girls are ahead of boys in permanent teeth emergence, no such pattern was observed. No significant difference was found in the eruption of permanent teeth in right and left arches. Eruption of all the mandibular teeth, with the exception of right first premolar (44) in both the genders, was earlier than their maxillary counterparts. There was overall delay in the eruption of permanent teeth and significant delay in the eruption of lower canines in both genders.ConclusionThe significant delay in the eruption of permanent mandibular canines is relevant for orthodontic treatment planning.How to cite this article: Chaitanya P, Reddy JS, Suhasini K, Chandrika IH, Praveen D. Time and Eruption Sequence of Permanent Teeth in Hyderabad Children: A Descriptive Cross-sectional Study. Int J Clin Pediatr Dent 2018;11(4):330-337.

Age and Sequence of Emergence of Permanent Teeth in a Population of Costa Rican Schoolchildren

“…The age and sequence of eruption varies among genders and ethnicities (1). In this study, most of the permanent teeth erupted first in the female sex, without being a statistically significant difference.…”

“…During dental examination, all erupted permanent teeth, except third molars, were recorded. A tooth was recorded as "emerged" if any part of it had penetrated the oral mucosa and become clinically visible (1,7,14). Age was calculated from the date of birth reported in the schools' documents to the day of oral examination.…”

“…The eruption of permanent teeth is influenced by climatic, racial, as well as genetics, hormonal factors, nutritional status, body composition, fluoride intake, season of birth, and various temporal and growth parameters. There are also general pathological conditions, irradiations, and developmental syndromes that can alter the eruption pattern (1). Gender is one of the factors that play an important role in eruption pattern, as many studies conclude that girls' teeth tend to erupt earlier (7)(8)(9).…”

Age and Sequence of Permanent Teeth Eruption in Lebanese Children

“…The sequence of eruption of the upper permanent teeth in Lebanese children (6-1-2- 4- 5- 3- 7) is different from that in Nepali [ 16 ], Pakistani [ 18 ], Australian [ 19 ], African [ 20 ] and Caucasian [ 21 ], but it is identical to the values of Iraqi children [ 17 ].…”

“…Maxilla Mandibula Lebanon (present study) 6 1 2 4 5 3 7 6 1 2 4 3 5 7 Nepal [16] 6 1 2 4 3 5 7 6 1 2 3 4 5 7 Iraq [17] 6 1 2 4 5 3 7 6 1 2 3 4 5 7 Pakistan [18] 6 1 2 4 3 5 7 6 1 2 3 4 5 7 Australia [19] 6 1 2 4 3 5 7 6 1 2 3 4 5 7 Ghana [20] 6 1 2 4 3 5 7 6 1 2 3 4 5 7 Northern Ireland [21] 6 1 2 4 3 5 7 1 6 2 3 4 5 7 France [22] 6 1 2 4 3 5 7 6 1 2 4 3 5 7…”