Sajeev, S (2008) Permanent Tooth Eruption and Its value in age assessment: A study on 290 School Children in Tamilnadu. Masters thesis, Madurai Medical College, Madurai.
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Abstract
INTRODUCTION : The value of tooth in estimation of age is well recognized. The various stages of development of teeth and the secondary ‘wear’ changes are the basis of age estimation. Tooth undergoes a series of changes from womb to tomb. Thus tooth acts as a guide to age’s estimation at any phase of life from fetal life to old age. The assessment during the later years of life is less accurate than during the earlier years, when the teeth are developing. Among the various stages of dental development, the only stage which is visible to naked eye is the emergence of tooth into oral cavity. The other stages require radiography for their demonstration. Thus to observe the eruption or non-eruption is easier and simpler than to observe the various radiological signs of tooth development. To determine the age of an individual by noting the eruption of teeth, the standard eruption times must be known. It is an established fact that the standard eruption times cannot be universally applied and regional standards have to be developed. Such standards, at present are not adequate. In order to meet the necessity to develop these standards, the present study was undertaken. In some of the previous studies elsewhere, the techniques for the estimation of age of eruption were based on crude graphical methods which are partly subjective in nature and that too on small sample data. The present study, attempts to over come these deficiencies. AIM OF THE STUDY : 1. The present study aims to determine the median age eruption of the permanent teeth. 2. The age of range of eruption of the above teeth will be expressed. 3. The study aims to fine whether any differences in the age of eruption can be found between the lower and upper jaws. 4. The study also aims to determine the normal ages of eruption with their ranges for each tooth among males and females and find the differences if any. MATERIAL AND METHODS : The present study was carried out on 290 children, consisting of 200 boys and 90 girls. The age of the subjects ranges from 6 years to 16 years. The study of eruption time of 3rd molar teeth is not included in the present work. Care was taken to see that the subjects are uniformly distributed between these two ages. The subjects selected were school children from Kindergarten to 10th standard. A school in Madurai city was taken up for the study, and as many children as possible were examined. The subjects represented mostly the middle socio-economic with few from lower socio-economic group. SUMMARY : 1. 290 school children were examined for the eruption of permanent dentition. There were 200 boys and 90 girls. 2. The median ages of eruption of all the permanent teeth except the third molar were determined by the method of probit analysis. 3. The fiftieth (P50) percentile values of the ages of eruption were estimated for each permanent tooth. 4. Standard charts for easy reference to the ages of eruption of various teeth in males and females have been constructed. 5. It has been found that in both sexes the eruption is earlier in the lower jaw than in the upper jaw . 6. The sexual dimorphism reported in the literature has been upheld by the present study. It has been found that females have earlier eruption times than males. 7. It has been recommended that studies of similar nature have to be conducted on samples from various geographic areas and various socio-economic strata. It has also been suggested that the influence of nutrition on the development of dentition has to be investigated.
| Item Type: | Thesis (Masters) |
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| Uncontrolled Keywords: | Permanent Tooth Eruption ; value in age assessment ; School Children ; Tamilnadu. |
| Subjects: | MEDICAL > Forensic Medicine |
| Depositing User: | Subramani R |
| Date Deposited: | 27 Feb 2018 17:07 |
| Last Modified: | 27 Feb 2018 17:07 |
| URI: | http://repository-tnmgrmu.ac.in/id/eprint/5896 |
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