Mean Age Of Eruption Research Articles

Eruption Time Estimation of Permanent 1st Molar, Central &, Lateral Incisors in 5.5 - 10 Years Age Children at Al Ramadi City / Iraq

The Parents consider tooth eruption as an important thing in the child's life development, and they have often showed their concern about the timing of eruption of teeth. The purpose of this study were to Estimate the average age for eruption time of Permanent 1st molar, central & lateral incisors in upper & lower Jaw (right & left) in both gender and to Compare the eruption time of these teeth between upper & lower Jaw ,right & left side ,male &female. This study was conducted at Al Ramadi City / Iraq, where the sample was consisted of “786” children (391 male & 395 female) of age 5.5 years to 10 years were they taken randomly fr om various schools. Eruption of various permanent teeth (1s t Molar, Central & Lateral Incisors teeth) were noted in both j aws and both sides. In our study we found that the permanent 1st molars were the first permanent tooth that erupts in all children at the age between 5.87 – 7.96 years on both jaws and on both right and left sides with the mean age of eruption at 6.57 ± 0.55 years in lower jaw and 6.62 ± 0.53 years in upper jaw. I n addition to that our study showed that the next permanent teeth to erupt were central incisors which erupt at the age between 6.14 – 8.93 years on both jaws and on both right and left sides w ith the mean age of eruption at 7.23 ± 0.61 years in lower jaw and 6.29 ± 0.57 years in upper jaw. Finally, the eruption of per manent lateral incisors were at the age between 7.66 – 9.93 years on both jaws and on both right and left sides with the mean age of eruption at 8.89 ± 0.56 years in lower jaw and 8.93 ± 0.55 years in upper jaw. The teeth erupted in female earlier tha n male and in the lower Jaw than upper Jaw. In the most cas es the right lower teeth erupted earlier than the other quadrant of both jaws. In general, we found that there was delay in the time of eruption of nearly all the teeth that were included in this study.

Influence of Birth Characteristics and Feeding Practices on Eruption of Primary Teeth in Children: A Preliminary Cross-sectional Observational Study.

The eruption process is under strong genetic control, external environmental factors also significantly contribute to this process. Therefore the present study was undertaken to identify the influence of birth characteristics and feeding practices on the eruption of the first primary tooth among healthy children in Pune, Maharashtra, India. The study was undertaken among 200 children aged 3-24 months. Children with any underlying conditions, those not accompanied by their mother and with neonatal teeth/natal teeth were excluded. The birth weight, gestational age, and type of delivery were obtained from medical records of the child. Data on feeding practices and the age of eruption of the first primary tooth was recorded after a structured interview of the mother followed by oral examination of the child. Gestational age was categorized into >37 weeks and <37 weeks, birth weight was divided into three groups-<1500, 1500-2500, and >2500 gm and four groups according to feeding practice during the first 6 months of life (exclusively breastfed, exclusively bottle fed, combination of breastfeeding and bottle feeding, and spoon-feeding). The mean age of eruption in the study population was 9.17 months. A9.05 months in males and 9.44 in females. A statistically significant correlation was noted with gestational age, birth weight, and feeding practices. Infants with a gestational age of >37 weeks, higher birth weight and those who were exclusively breastfed for the first 6 months had an earlier eruption of first primary teeth. External factors seem to influence the eruption of the primary tooth. More longitudinal studies with larger sample sizes and matching confounders are needed to clearly understand the factors affecting the primary tooth eruption. Shetty SS, Mathur A, Gopalakrishnan D, et al. Influence of Birth Characteristics and Feeding Practices on Eruption of Primary Teeth in Children: A Preliminary Cross-sectional Observational Study. Int J Clin Pediatr Dent 2023;16(5):724-727.

Effect of Neonatal Factors on the Eruption of Primary Teeth in Children: A Longitudinal Prospective Cohort Study.

Eruption of first primary teeth is a normal physiological process. Antenatal nutritional deficiency and prenatal and neonatal factors play an important role in eruption of primary teeth. Neonatal factors, such as gestational age (GA), degree of prematurity, severity of neonatal illness, and birth weight are primarily related to eruption of primary teeth. The relation between neonatal factors and the timing of eruption of primary teeth has not been studied prospectively among Indian preterm infants. To evaluate the influence of neonatal factors on the eruption of primary teeth in children born preterm. A prospective longitudinal cohort study design was adopted. A total of 150 subjects were recruited by simple random sampling. Each child was followed up from birth up to 36 months. Intraoral examination was done and the teeth present in each visit were recorded. Data were statistically analyzed and interpreted. Descriptive statistics, t-tests for independent sample, and Pearson's chi-squared tests were applied. Tooth showing statistically significant difference in mean age of eruption between term and preterm categories was studied for the effect of maternal and neonatal characteristics on eruption using multivariate regression analysis. The mandibular central incisor was the first tooth to erupt. Significant determinant of eruption of mandibular incisor in term children was found to be parity, weight for GA, and complementary feeding, whereas for preterm children, significant determinants were parity, birth weight birth length, weight for GA, and complementary feeding. Neonatal factors, such as birth weight, birth length, weight for GA, and introduction of complementary feeding have a strong significant association with the eruption of primary teeth. The findings of this study will guide in the preventive management of oral health in preterm children. Indira MD, Nandlal B, Narayanappa D, et al. Effect of Neonatal Factors on the Eruption of Primary Teeth in Children: A Longitudinal Prospective Cohort Study. Int J Clin Pediatr Dent 2023;16(2):321-326.

Evaluation of the Relationship between the Weight and Height Percentiles and the Sequence and Chronology of Eruption in Permanent Dentition.

The standard eruption of the permanent dentition in growing patients is influenced by multiple environmental factors. The objective of this research was to study the relationship between height and weight percentiles and the eruption of the permanent dentition. The design of the study was transversal based on the review of the clinical history, visual dental inspection, weight and height indicators, and their respective percentiles in patients in the mixed and definitive dentition stage. The descriptive and comparative analysis of the data was carried out with the statistical software R version 4.1.1. The sample size was 725 participants. The mean age of eruption of the first tooth was 8.0. The eruption sequence in the upper arch was first molar, central and lateral incisor, first premolar, canine, second premolar, and second molar. In the lower arch, the eruption sequence was: central incisor, first molar, lateral incisor, canine, first and second premolar, and second molar. The most frequent weight percentile was P50-97 (50.34%) and height P3-50 (53.38%). Weight (0.0129; 0.0426; 0.0495; 0.000166) and height (0.00768; 0.00473; 0.00927; 10−5) variables significantly influenced dental eruption. The factor that most influences the eruption of the permanent dentition is the height percentile.

Eruption Timing and Sequence of Primary Teeth in a Sample of Romanian Children.

Teething is considered a significant event in the growth and development of the child by parents and especially by paediatric dentists and forensic scientists. They constantly need an “up-to-date mirror” of its variability for different geographic regions. The aims of the current study were to determine the timing and sequence of primary tooth emergence, and to establish a correlation between tooth eruption and general growth and external parameters in a sample of Romanian children. This study included 70 healthy children (53% girls and 47% boys), and the analysed data resulted from the questionnaires completed by parents during the whole process. General and specific data on primary teeth eruption were obtained. The differences between sexes were insignificant, except for the maxillary and mandibular canines (p = 0.047 and p = 0.018) and lower temporary second molars (p < 0.001), which were significantly increased in boys. The differences found between the two hemiarches were insignificant (p = 0.197). The mean age of eruption of the first tooth erupted was 7.07 ± 1.990 months. The unpaired t-test was used for comparison of the timings of eruption of the first primary teeth, according to the number of previous births and type of diet, and it was insignificant (p = 0.665 and p = 0.983 respectively).

Relationship Between the Eruption of Third Molar Teeth and the Growing Status of the Assamese Inhabitants of a North-Eastern State of India.

ObjectivesEven though permanent teeth eruption time may vary, the tooth eruption stage represents a critical developmental milestone, which may help in the monitoring of the child's growing status towards adolescence. This paper aims to evaluate the relationship between the third molar eruption (TME) and investigate any possible association with the body mass index (BMI), which is used to monitor the growth of children and adolescents.MethodsWe included 1060 student participants aged 14 to 26 years from selected educational institutions in Assam for this study. We performed a conventional clinical dental examination to determine the stages of TME. Moreover, to calculate the individual height and weight, we have carried out a thorough physical examination to assess the BMI and rule out any visible congenital developmental anomalies.ResultThe overall mean age of the status of no eruption (NE), incomplete eruption (IE), and complete eruption (CE) categories of the third molar in the current research were 17.39±2.273, 18.67±2.282 and 20.33±2.566 years, respectively, and the difference in mean age was statistically significant (p-value <0.05). Among the 1060 participants assessed, 163 (15.38%) were underweight, 625 (58.97%) belonged to the average category, 207 (19.52%) were at risk of being overweight, and 65 (6.13%) were obese. The CE in both average and overweight categories was 109 (17.4%) and 37 (17.9%). Similarly, the NE status of the third molar in the underweight and obese category was 120 (73.6%) and 39 (60.0%), respectively. These differences in the frequency of TME in different BMI categories were found statistically significant (p-value <0.05).ConclusionThe result shows a substantial relationship between the mean age of eruption of third molar teeth and BMI among children and adolescents in 14 years to 26 years in the Assamese population. Further, the mean age can be used in forensic age determination.

Age estimation from eruption of permanent teeth in school children

Aim: To study the age estimation from eruption of permanent teeth in school children. Objective: 1) To study eruption of permanent teeth in a child of age group from 6 years to 14 years. 2) To study and compare eruption timings of maxillary and mandibular teeth between boys and girls. Material and Methods: This was a prospective study. A random sample of 180 school children in the age group of 6 to 14 years was selected. The mean age of eruption of individual permanent teeth was recorded and result was analysis. Result: The study population included 99 boys constituting 54.995% and 81 girls constituting 44.997% of the total sample. In the age group of 6 years, the first permanent molar teeth was found to be erupted. In the age group of 14 years, all the permanent teeth except third molar had erupted. Girls showed early tooth eruption compared to boys. Mandibular teeth erupted earlier than maxillary teeth in both the sexes. Right and left side teeth erupted at same time in both the arches. Conclusion: The mean ages of eruption obtained from the present study are strikingly comparable with those of other investigators in different population across the world. Keywords: Federation Dentaire International (FDI).

Studija o nicanju trajnih zuba kod dece uzrasta od pet do deset godina koja su posetila Stomatološki fakultet u gradu Mangalore u Indiji

Teeth are biological markers of maturity, and their eruption into the oral cavity is an essential milestone in an individual's life. Multiple factors have been considered to play a role in the pattern of tooth eruption, including dental caries, fluorides and congenital conditions such as Down's syndrome. The aim of the paper was to determine the time of eruption of permanent teeth amongst children aged between five and ten years, visiting the Dental College in Mangalore. A survey was conducted among children aged between 5 to 10 years visiting A.B. Shetty Memorial Institute of Dental Sciences Deralakatte, Mangalore. Each child included in the study was screened by clinical examination for the erupted and erupting permanent teeth. A parent/guardian accompanying a child was interviewed and their data were recorded. The study revealed that the first tooth to erupt was the left mandibular first molar, with a mean age of eruption at 6.4 years. A slight early eruption of teeth was noticed in the left side of the jaw compared to the right side in the present study. The first permanent tooth to erupt in the oral cavity is the left mandibular first molar and there is a slight delay in the eruption of the maxillary lateral incisor in the study population.

Correlation of the Age of Eruption of Teeth with the Body Mass Index among School Children

The timing of tooth eruption is influenced by various factors, especially the nutritional status of the individual. Body Mass Index gives an indication about the nutritional status of the child. Hence this study was done to determine the correlation between the mean age of eruption of permanent teeth and the Body Mass Index among school children in Thiruvananthapuram. A cross sectional study was done among the students of Thiruvananthapuram. Two thousand nine hundred students (males and females) were included in the study. Only those with the documentary proof of their date of birth were included in the study. For statistical purposes, only completed year was taken into consideration. Random sampling was done by selecting the alternate students from the attendance register. The dental examination was made in the adequate light with the aid of a mouth mirror and a probe. The details of eruption were observed and charted according to the Modified System of Federation Dentaire Internationale (Modified F.D.I). There were 1568 males and 1357 females out of the total sample of 2925 children. The mean age of eruption of mandubular central incisors, mandibular lateral incisors, maxillary second premolars and maxillary first molars were found to have statistical significant difference among the different categories of BMI status. Among the different categories of BMI, Underweight children were found to have late eruption of teeth compared to overweight children.

A cross-sectional study on eruption timing of primary teeth in children of Mysore, Karnataka.

Eruption of first primary teeth is the most anxiously awaited developmental milestone in a child. However, primary teeth have shown wide variations in their eruption time among different population, ethnic, and racial groups. The present study was conducted with the aim to evaluate the time and sequence of eruption of primary teeth of children of Mysore. A cross-sectional study design included 1392 participants aged 3 months to 36 months recruited by simple random sampling method. The variables such as age, gender, and number of erupted primary teeth were recorded. Clinical examination was done under natural illumination. A tooth was considered erupted when any part of its crown had penetrated the gingiva and was visible in the oral cavity. Probit regression analysis was performed to obtain the mean and median age of eruption of teeth. The significance of difference in the mean age of eruption across gender and arch was determined using paired t-test. The first primary tooth to erupt was mandibular central incisor at 10.24 ± 2.47 months followed by maxillary central incisor at 11.06 ± 2.65 months. The duration of primary teeth eruption was 17.89 and 18.32 months in males, 18.54 months and 18.32 months in females for maxilla and mandible, respectively. Eruption of primary tooth is delayed among children of Mysore as compared to standard eruption chart. The results will provide information to health professional about contemporary tooth eruption time derived from an Indian population.

Timing and sequence of emergence of permanent teeth in Syrian schoolchildren.

The aim of the present study was to investigate the timing and sequence of the eruption of permanent teeth in Syrian schoolchildren. A total of 1211 children aged 5-13years were included. Every permanent tooth was scored according to its clinical stage of eruption. The significance of difference was tested using t test. The mean number of erupted teeth in children aged 5-6years was 2.41±2.68, and reached to 24.48±3.60 in those ages between 12 and 13years. Mandibular teeth erupted earlier than maxillary opposing teeth in both sexes, except upper premolars. The eruption significantly proceeded in girls when compared to boys. Differences were significant for numbers 11 (P=.003), 21 (P=.035), 13 (P=.013), 42 (P=.038), 33 (P=.009), and 45 (P=.012). There was no significant difference between contralateral teeth (right and left) in the mean age of eruption in both arches. Lower central incisors and first molars were the earliest teeth to emerge in both sexes. Second molars were the last teeth to emerge in boys (maxilla: 11.68years, mandible: 11.15years) and girls (maxilla: 11.2years, mandible 10.99years). Findings could be used as Syrian standards of eruption when health professionals assess normal occlusion and need to determine the correct timing for preventive or corrective procedures.

Age estimation by stages of eruption of third molar in male population of Rajasthan

The present study was conducted on 200 healthy males among the age group of 17–25 years from Rajasthan state to observe the stage wise pattern of eruption of third molar for purpose of age estimation. Only those subjects were included in the study that did not show any diseased teeth or chronic illness in the form of endocrinal disorder or nutritional disorder or muscle skeletal disorder. The examination was done in good light with the help of torch and the teeth were considered erupted, in four stages with stage 0: No eruption with occlusal plane covered with alveolar bone; stage 1: When tip of crown of tooth penetrated the gum margin; stage 2: Partial eruption but not full occlusion; stage 3: Full eruption or full occlusion. All the data collected was entered into the excel sheet and the statistical analysis was done. The results were as follows: the mean age of eruption of left maxillary third molar was 21.0 ± 2.2 years, the mean age of eruption of right maxillary third molar was 21.0 ± 2.2 years, the mean age of eruption of left mandibular third molar was 21.0 ± 2.2 years, the mean age of eruption of right mandibular third molar was 21.0 ± 2.2 years.

Comparison of chronology of teeth eruption with body mass index among school children at Mangalore: A cross-sectional study

Introduction: The development and eruption of the teeth, chronologies of human dentitions, dental age, and tooth formation standards are important aspects applied to dental practice. Body mass index (BMI) gives an indication about the nutritional status of the child. It is relevant to know whether BMI has influenced chronology of tooth eruption pattern. Aim: To determine the eruption age of the different permanent teeth and compare eruption age with BMI in a group of children from selected schools in Mangalore. Materials and Methods: A cross-sectional study was designed in which 2928 children ranging in age from 5.5 to 15 years were included in the study. The children were divided into 20 chronological age groups with half year intervals. All the children were examined by a single examiner with the help of a trained assistant. The teeth were examined under natural light with mouth mirror. The comparison was made between mean eruption ages in males and females using the independent t -test. Results: There were 1526 males constituting 52.1% and 1402 females constituting 47.9% of the total sample of 2928 children. The mean age of eruption of maxillary central incisor, maxillary lateral incisor, maxillary and mandibular canines, maxillary and mandibular premolars, maxillary and mandibular second molars were found to have statistical significant with BMI. The mean age of eruption of the teeth in females was found to be earlier than in males, with the exception of the maxillary first molar which is earlier in males. Conclusion: Different categories of BMI were underweight, normal weight, risk of overweight and overweight, wherein overweight children had early eruption of teeth. Girls had early eruption time compared to boys.

Age estimation and eruption of permanent teeth between two genders-A cross sectional study

Identification is necessary in living persons, recently dead, decomposed bodies, mutilated bodies, skeletonised bodies etc. Age estimation constitutes one of the important tools for identification of a person, both in civil and criminal cases. Teeth are the most reliable material in identification and age estimation in the dead as they do not undergo mutilation by fire or decomposition A tooth is considered to be erupted when the crown or any part of the tooth becomes clinically visible in the oral cavity. The present study was conducted to collect the cross-sectional data for the time and sequence of eruption of permanent teeth among the school going children of north Indian population. The age group was limited to 6 to 14 years, which includes the age range at which all permanent teeth have been found to be erupted, except the third molars. Schools registered with Directorate of school education were considered for the study. A total of 1804 subjects were examined. The mean age of eruption of mandibular first molar has been found to be earlier than the permanent mandibular central incisor as well as earlier in females compared to males. Also the mean age of eruption of any tooth has been found to be earlier in mandible as compared to maxilla in both males and female. Permanent teeth erupted earlier in females than in males and also earlier in mandible compared to maxilla.

Time and sequence of eruption of permanent teeth in Ankara, Turkey

IntroductionThe aim of this study was to determine time and sequence of eruption of permanent teeth in addition to caries status and gender differences in children and young adolescents in Ankara. Materials and methodsCross-sectional data were collected by examining a total of 890 (407 female and 483 male) pre-school, primary and secondary school children of 5–15 years of age. The mean age of eruption and caries status of individual permanent teeth were recorded. Data were statistically evaluated with sample T-Test and One-way ANOVA. ResultsEruption tended to be earlier in girls than boys in most of the groups accept for the teeth 44. The sequences of eruption of permanent teeth were 6-1-2-4-3-5-7 in mandible, and 6-1-2-4-5-3-7 in maxilla in boys whereas 1-6-2-3-4-5-7 in mandible, and 6-1-2-5-4-3-7 in maxilla in girls. Increased caries prevalence was seen both in primary and permanent teeth. ConclusionWhen compared with the other studies, eruption times show differences which were affected by genetics, genders, ethnicity, nutrition, fluoridation, carious condition, premature extraction of predecessors, socioeconomic variables, congenital anomalies and the changes in eruption time is significant when planning dental treatments.

Estimation of Age of Eruption of Second Permanent Molars among School Children in Kuppam, Andhra Pradesh

Objectives : To find the age of eruption of second permanent molar teeth among school children in Kuppam Materials&Method : 762 school children, studying and belonging to Kuppam, aged between 9 and 15 were examined for the eruption of second permanent molar teeth after informed consent from the school authorities. Results: The mean age of eruption of right maxillary second permanent molar was 10.08 +/-0.55 (males) and 12.9 +/- 1.2 (females). For left maxillary second permanent molar, it was 10.36 +/- 0.71 (males) and 12.74 +/- 1.02 (females). For right mandibular second permanent molar, it was 12.24 +/- 0.99 (males) and 12.39 +/- 1.17 (females). For left mandibular second permanent molar, it was 12.2 +/- 1.02 (males) and 10.38 +/- 0.72 (females). Conclusion : As most prominent text books of Forensic Medicine in India give age of eruption of second permanent molars as 12 to 14 years and considering the earlier age of eruption of second permanent molars in recent studies including ours, it is our suggestion that, many more studies may be conducted in different parts of India. This fact may be considered for revision in the textbooks.

Eruption times and patterns of permanent teeth in school children of India

To study the eruption pattern of permanent teeth excluding third molars in school children of Mysore, South India. To compare the eruption times determined with previous studies. To determine range of variation of the eruption time of each tooth and evaluate if any preponderance exists in the eruption timings of maxillary and mandibular teeth and between boys and girls. This was a descriptive cross sectional study. A random sample of 5007 school children in the age group of 5-14 years was selected. The mean age of eruption of individual permanent teeth was recorded and results were analyzed using Probit analysis. The study population included 2371 boys constituting 47.26% and 2636 girls constituting 52.65% of the total sample. In the age group of 5 years, one of the permanent teeth was found to be erupted. In the age group of 14 years, all the permanent teeth except third molar had erupted. Girls showed early tooth eruption compared to boys. Mandibular teeth erupted earlier than maxillary teeth in both the sexes. Right and left sided teeth erupted at the same time in both the arches. The mean ages of eruption obtained from the present study are strikingly comparable with those of other investigators in different populations across the world. Since the current study involves a large sample of children, the data reported in this study could be used as standards when assessing permanent tooth eruption in Indian children.

Timing and sequence of primary tooth eruption in children with cleft lip and palate

ObjectiveTo determine the timing and sequence of eruption of primary teeth in children with complete bilateral cleft lip and palate.Material and MethodsThis cross-sectional study was conducted at the Hospital for Rehabilitation of Craniofacial Anomalies of the University of São Paulo, Bauru, SP, Brazil, with a sample of 395 children (128 girls and 267 boys) aged 0 to 48 months, with complete bilateral cleft lip and palateResultsChildren with complete bilateral clefts presented a higher mean age of eruption of all primary teeth for both arches and both genders, compared to children without clefts. This difference was statistically significant for all teeth, except for the maxillary first molar. Mean age of eruption of most teeth was lower for girls compared to boys. The greatest delay was found for the maxillary lateral incisor, which was the eighth tooth of children with clefts of both genders. Analyzing by gender, the maxillary lateral incisor was the eighth tooth to erupt in girls and the last in boys.ConclusionThe results suggest an interference of the cleft on the timing and sequence of eruption of primary teeth.

Can crown-root ratio predict premolar eruption?

The purpose of this study was to establish a method to prospectively predict the eruption of mandibular second premolars with panoramic radiographs. This technique could be used clinically to optimize the timing of comprehensive treatment, detect abnormalities of development and eruption, or effectively estimate eruption timing and determine the need for early intervention because of caries or defects of the deciduous dentition. Three hundred one white children from an orthodontic practice in Alaska between the ages of 6 and 16 years were examined and monitored with serial panoramic radiographs until all premolars had erupted. Eruption of the mandibular second premolar was predicted at the first examination based on the panoramic radiograph. When the mandibular second premolar erupted, a researcher measured the crown length to crown-plus-root length ratio on the radiograph using the Simpson and Kunos scale, and the prospectively predicted timing of eruption was compared with the actual timing. The Simpson and Kunos scale allowed a rapid assessment for predicting the time of eruption of mandibular second premolars. The mean age of eruption of the mandibular second premolar in these children was 12.5 years.

Chronology and Sequence of Eruption of the Permanent Teeth in Patients with Complete Unilateral Cleft Lip and Palate

To establish the chronology and sequence of eruption of the permanent teeth in subjects with complete unilateral cleft lip and palate. Cross-sectional. Data on children presenting complete cleft lip and palate were evaluated. The study was carried out at the Hospital for Rehabilitation of Craniofacial Anomalies, Bauru, São Paulo, Brazil. The sample comprised 477 patients with complete unilateral cleft lip and palate, aged 5 to 14 years. Of these patients, 166 were girls and 311 were boys. The girls presented, for all maxillary and mandibular teeth, a smaller mean age of eruption than the boys. The maxillary lateral incisor and cuspid adjacent to the cleft presented significantly higher mean ages of eruption than their homologous teeth on the noncleft side.