[MARMAM] New publication on dental wear in dolphins

Carolina Loch carolinaloch at yahoo.com.br
Tue Jan 8 11:39:30 PST 2013

Dear MARMAM subscribers:

We are pleased to announce the publication of the following paper in Archives of Oral Biology:

Dental wear in dolphins (Cetacea: Delphinidae) from southern Brazil

Carolina Loch and Paulo C. Simões-Lopes

doi: 10.1016/j.archoralbio.2012.08.002

Volume 58, Issue 2, February 2013, Pages 134–141

 Dental wear is a common phenomenon in mammals. Its occurrence is 
influenced by tooth anatomy, animal physiology, biomechanics and 
behaviour. So far, investigations of dental wear in cetaceans have been 
scanty and superficial. We compare the frequencies of occurrence, 
location and intensity of dental wear in some species of dolphins from 
southern Brazil, South Atlantic Ocean. (2) Teeth of ten species were 
evaluated using a stereoscopic microscope to identify wear facets, which
 were classified according to location, anatomical position and wear 
intensity. (3) Frequencies of dental wear were high for all species with
 exception of Delphinus capensis, with less than 50% of teeth 
worn. Simultaneous wear facets in the apex and lateral of teeth were 
more common than facets restricted to the apex or lateral faces. Wear on
 the dental crown was more common, but some species showed less frequent
 wear down to the cingulum or root level. Superficial wear seems to be 
the general trend for dolphins, but Stenella coeruleoalba and Pseudorca crassidens showed a higher frequency of severe wear. Only for Tursiops truncatus
 the frequencies of wear were significantly different between males and 
females. When considering the ontogeny of dental wear, only for T. truncatus and Stenella frontalis
 indexes of dental wear were correlated with body length. (4) Whether 
dental wear has implications or not in fitness and feeding behaviour, 
severely worn teeth may expose the pulp cavity and increase the 
susceptibility to local infections.KeywordsDental crown; Marine mammals; Occlusion; Ontogeny; Wear intensity; Teeth 
Full text is available at: http://dx.doi.org/10.1016/j.archoralbio.2012.08.002 

Or alternatively, a pdf can be requested at: carolinaloch at yahoo.com.br 

Best regards,

MSc. Carolina Loch Silva 
PhD Candidate
Geology Department, University of Otago
Dunedin 9054, New Zealand
Laboratório de Mamíferos Aquáticos UFSCFlorianópolis, SC - Brasil 
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