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Rates of dentine mineralization in permanent human teeth
Author(s) -
Dean M. C.,
Scandrett A. E.
Publication year - 1995
Publication title -
international journal of osteoarchaeology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.738
H-Index - 60
eISSN - 1099-1212
pISSN - 1047-482X
DOI - 10.1002/oa.1390050405
Subject(s) - mineralization (soil science) , molar , dentistry , enamel paint , permanent teeth , orthodontics , crown (dentistry) , permanent tooth , geology , medicine , soil science , soil water
Previous experimental studies have estimated linear rates of dentine formation in modern humans to be close to 4μm day −1 . In this study a method similar to that first adopted by Kawasaki, Tanaka and Ishikawa 5 was used to estimate linear rates of dentine mineralization over a period of 1200 days in both the cusps and cervical regions of several permanent tooth types. All teeth were from the same individual. Rates in the cusps of teeth with the tallest crowns were estimated to be between 5 μm day −1 and 6 μm day −1 . This is higher than previous estimates in permanent tooth crowns, although rates in the cusp of a first permanent molar, where cusps were less tall and cuspal dentine therefore less thick, were close to previous estimates of 4 μm day −1 . Despite this variation in cuspal rates, mineralization rates were linear in all cusps studied over a long period of time. Rates in the cervical region, either close to the enamel dentine junction or to the cement dentine junction, were estimated to be between 1.3 μm day −1 and 1.5 μm day 11 , much slower than reported previously. Rates in the mid‐portion of the dentine, in both the lateral part of the crown and in the cervical one‐third of the root, rose steadily to match rates in the cuspal region, but then slowed towards the pulp chamber. These data extend the findings of previous studies on permanent human dentine. They demonstrate a wide range of mineralization rates in permanent dentine and provide a more secure basis for judging different rates in different locations of different human tooth types.