Pathological studies of cheek teeth apical infections in the horse: 2. Quantitative measurements in normal equine dentine

D.J. Shaw, I.T. Dacre, P.M. Dixon

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Measurements of primary, regular and irregular secondary dentine and pulp dimensions were made oil transverse, sub-occlusal and mid-tooth sections, of 40 maxillary and 42 mandibular control equine cheek teeth (CT) of different ages. Maxillary and mandibular CT primary dentine in different age groups had a mean thickness of 922-1065 mu m and 1099-1179 mu m, respectively, on the lateral aspects, and 1574-2035 mu m and 1155-1330 mu m, respectively, on the medial aspects of pulp horns. Surprisingly, some increase in thickness was found in some mandibular CT primary enamel in the first few years following eruption.

Regular secondary dentine thickness increased with age, for example at mid-tooth level in mandibular CT from 124 mu m at 3 years dental age to 290 mu m at >7 years dental age on the lateral aspect of pulp horns, and from 166 pin to 509 pm oil the medial aspects Of Pulp horns, indicating a deposition rate of 0.5-10 mu m/day. This type of dentine was thicker sub-occlusally than in the mid-tooth region. Maxillary dentinal dimensions showed a similar age-related increase in thickness. Maxillary CT dentine was significantly thicker (72% in primary, 43% in regular secondary dentine) oil the media] compared to the lateral aspects Of Pulp horns, but mandibular CT dentine was just 15% and 14% thicker in primary and regular secondary dentine thickness, respectively, oil the their medial as compared to their lateral aspects. Dentinal and pulp dimensions varied between individual pulp horns, Triadan tooth position, and dental age, with complex interactions between these variables for some parameters.
Original languageEnglish
Pages (from-to)321-332
Number of pages12
JournalThe Veterinary Journal
Issue number3
Publication statusPublished - Dec 2008


  • Horse
  • Dental anatomy
  • Dentinal measurements
  • Dentine histology

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