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»Longitudinal chronology« of the second dentition
M. Hadžiomeragić
; Dom zdravlja »Centar«, Sarajevo
Sažetak
On the basis of the necessary elements a chronology of the second dentition by the author named »Longitudinal Chronology« has been drawn up. He introduces the term Dentinification for the phase of growth following the eruption of teeth. The second dentition begins after the completed 5 th year of life but does not terminate at the 21st year of life. Not one single tooth has been found to dent'inificate by 100%: among the second premolars 3% did not dentificate, among the second incisors 2% did not dentinificate, among the second molars 1.5% etc. According to the intensity of dentition he distinguishes three periods: the »period of intensive dentition« from 6 — 14 years in which period about 84% of the teeth tend to dentinificate, the »period of slow dentition« covering the age group from 15—21 years in which about 9 4% of the teeth dentinificates while in the »period of dubious dentition« after the 21st year of life there remains perhaps 9% of all teeth to dentinificate. The earliest completed set of teeth has been found by the author in 2% of subjects at the age of 17. On the basis of the results obtained the author concludes that the shortest period of the second dentition is approximately 12 years. The average number of the dentinificated teeth at the age of 21 amounts to approximately 29.2 of all teeth, i.e. 91% of the 32 permanent teeth. Dentition of individualteeth lasts several years: the incisors in the maxilla take about 5 years, in the mandible about 4 years, the canines take about 6 years, the first premolars about 7 years, the second about 6 years, the first molar in the maxilla takes about 4 years and in the mandible about 3 years, the second molar 7 years etc. The teeth in the mandible dentinificate earlier than those in the maxilla in about 65% of all cases and this phenomenon is particularly well marked in the front teeth. In most cases the teeth on the left side dentinificate 4% earlier than those on the right side. In female patients the process of dentition develops approximately 8% earlier than in males.
Ključne riječi
Hrčak ID:
108085
URI
Datum izdavanja:
15.6.1972.
Posjeta: 1.038 *