Abstract
SUMMARY Tooth surface and interradicular area (furcation) measurements were determined for 20 fourth maxillary premolar teeth obtained randomly from canine cadavers. The palatal furcation entrance had a mean width of 1.2 ± 0.1 mm. The coronal roof of the palatal furcation was located at the cementoenamel junction (cej). The buccal furcation entrance had a mean width of 0.9 ± 0.2 mm. The horizontal attachment area between the cej and the coronal roof of the buccal furcation was 1.3 ± 0.3 mm. The mesial furcation entrance had a mean width of 0.4 ± 0.1 mm. The horizontal attachment area between the cej and the coronal roof of the mesial furcation entrance was 1.7 ± 0.3 mm. The mean coefficient of variation for variables measured was 10.3%. Tooth size did not have a significant effect on furcation entrance measurement. All teeth had a fluted area between the cej and mesial furcation, a concavity coronal to the furcation area, a distal concavity of the mesial root trunk between the mesiopalatal and mesiobuccal roots, and a mesial furcation concavity of the distal root extending apically for a mean distance of 60% of the distal root length. The complexity of furcation entrance anatomy may be a factor in the manifestation of periodontal disease involving the furcation of the fourth maxillary premolar in dogs.
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