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Comparison of the microhardness of enamel, primary and regular secondary dentine of the incisors of donkeys and horses
Author(s) -
Du Toit N.,
Bezensek B.,
Dixon P. M.
Publication year - 2008
Publication title -
veterinary record
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.261
H-Index - 99
eISSN - 2042-7670
pISSN - 0042-4900
DOI - 10.1136/vr.162.9.272
Subject(s) - knoop hardness test , donkey , enamel paint , dentistry , equidae , incisor , horse , indentation hardness , orthodontics , medicine , materials science , biology , composite material , ecology , paleontology , microstructure
The microhardness of the enamel, primary dentine and regular secondary dentine of seven donkey and six horse incisors was determined with a Knoop indenter at the subocclusal and mid‐tooth level. The mean microhardnesses of the donkey incisor enamel, primary dentine and secondary dentine were 264·6 63·00 and 53·6 Knoop Hardness Number, respectively. There was no significant difference between the microhardness of the enamel and primary dentine on the incisors of the donkeys and horses, but the microhardness of the regular secondary dentine of the donkeys' incisors at the mid‐tooth level was slightly but significantly less than that of the horses. There was also a difference in the microhardness of the secondary dentine between the subocclusal and mid‐tooth levels in both donkey and horse incisors.