Loss of tooth-supporting bone in the koala (Phascolarctos cinereus) with age

Lee, Elizabeth F., Varanasi, Srinivas, Pettett, Lyndall M., Bird, Philip S. and Symons, Anne L. (2011) Loss of tooth-supporting bone in the koala (Phascolarctos cinereus) with age. Australian Journal of Zoology, 59 1: 49-53. doi:10.1071/ZO10047

Author Lee, Elizabeth F.
Varanasi, Srinivas
Pettett, Lyndall M.
Bird, Philip S.
Symons, Anne L.
Title Loss of tooth-supporting bone in the koala (Phascolarctos cinereus) with age
Formatted title
Loss of tooth-supporting bone in the koala (Phascolarctos cinereus) with age
Journal name Australian Journal of Zoology   Check publisher's open access policy
ISSN 0004-959X
Publication date 2011
Sub-type Article (original research)
DOI 10.1071/ZO10047
Volume 59
Issue 1
Start page 49
End page 53
Total pages 5
Place of publication Collingwood, VIC, Australia
Publisher CSIRO Publishing
Collection year 2012
Language eng
Formatted abstract
This study investigated changes in alveolar bone height in free-ranging koalas of different age groups. Twenty-seven free-ranging Queensland koalas (15 female, 12 male), admitted to the Moggill Koala Hospital, Brisbane, were used in this study. Koalas were divided into three groups (young, adult, old) on the basis of tooth wear, each group containing nine animals. Defleshed jaws were examined for the presence of alveolar bone defects. The distance from the cemento-enamel junction and the interproximal crestal alveolar bone height was measured on the buccal aspects of the second and third molars. Jaws were photographed and radiographed. Bone defects (dehiscences and fenestrations) were observed in both jaws and were predominantly located on the buccal aspect of the alveolar process. The loss of height of crestal alveolar bone, relative to the cemento-enamel junction, increased with age, with 25 koalas showing moderate to severe bone loss and only two koalas having none/mild loss levels at all measurement sites. Female koalas had higher frequency of ‘none/mild’ cases of bone loss than did males. There was no variation in levels of alveolar bone loss between the upper and lower jaws or the corresponding right and left arches.
Keyword Alveolar bone loss
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2012 Collection
School of Dentistry Publications
School of Veterinary Science Publications
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