Objective—To determine elemental composition of
teeth with and without odontoclastic resorption
lesions (ORL) in cats.
Sample Population—Normal teeth from 22 cadaver
cats and ORL-affected teeth from 21 cats admitted to
the veterinary hospital for dental treatment.
Procedure—An electron microprobe was used to
analyze weight percentages of calcium, phosphorus,
fluorine, sodium, magnesium, sulfur, potassium, and
iron in enamel, dentin, and cementum.
Results—Calcium and phosphorus were the most
abundant elements. Fluorine, sodium, and magnesium
combined were < 5% and sulfur, potassium,
and iron combined were < 0.1% of total elemental
composition. In enamel of normal teeth, a significant
sex-by-jaw location interaction was seen in mean
(± SD) phosphorus content, which was higher in
mandibular teeth of females (17.64 ± 0.41%) but
lower in mandibular teeth of males (16.71 ± 0.83%).
Mean iron content in dentin of normal teeth was significantly
lower in mandibular teeth than maxillary
teeth (0.014 ± 0.005% vs 0.023 ± 0.019%). Mean
enamel sodium content was significantly higher
(0.77 ± 0.046% vs 0.74 ± 0.025) and mean enamel
iron content was significantly lower (0.017 ± 0.008%
vs 0.021 ± 0.005%) in ORL-affected teeth, compared
with normal teeth. In cementum, mean fluorine content
was significantly lower (2.98% ± 0.27 vs 2.99 ±
0.20%) and mean magnesium content was significantly
lower (0.54 ± 0.13% vs 0.60 ± 0.13%) in ORLaffected
teeth, compared with normal teeth.
Conclusions and Clinical Relevance—Results of our
study establish baseline mineral content of enamel,
dentin, and cementum for normal teeth in cats.
Minimal differences in mineral content of enamel and
cementum of normal and ORL-affected teeth were
detected. (Am J Vet Res 2002;63:546–550)