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Unilateral failure of development of mandibular premolars and molars in an Eastern Grey kangaroo ( Macropus giganteus ) and its effects on molar progression
Author(s) -
Barber D,
Campbell J,
Davey J,
Luke T,
Ågren E,
Beveridge I
Publication year - 2008
Publication title -
australian veterinary journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.382
H-Index - 59
eISSN - 1751-0813
pISSN - 0005-0423
DOI - 10.1111/j.1751-0813.2007.00212.x
Subject(s) - molar , mandible (arthropod mouthpart) , dentition , mandibular second molar , mandibular first molar , premolar , medicine , dentistry , tooth eruption , orthodontics , biology , botany , genus
An adult male Eastern Grey kangaroo from a wildlife reserve near Melbourne was submitted for necropsy examination and was discovered to have abnormal dentition. There was no evidence that any premolars or molars had ever been present on the right mandible, whilst the incisors were normal. The age of the kangaroo was estimated to be 1 year 9 months using the right maxillary molars and 2 years 4 months old using the contralateral side, presumably due to the asymmetry of the dental arcades. ‘Lumpy jaw’, a common periodontal disease of kangaroos, from which Bacteroides sp was cultured, was present on the base of the vertical ramus of the left mandible. Complete unilateral absence of premolar and molar teeth in the mandible of a kangaroo has not been described. This condition affected molar progression in both sets of maxillary molars.