Navigation Links
Reptilian root canal: U of T Mississauga study reveals infection in jaw of ancient fossil
Date:4/18/2011

A reptile that lived 275-million years ago in what is now Oklahoma is giving paleontologists a glimpse of the oldest known toothache.

Led by Professor Robert Reisz, the chair of the Department of Biology at the University of Toronto Mississauga, scientists found evidence of bone damage due to oral infection in Paleozoic reptiles as they adapted to living on land. Their findings, published online in the journal Naturwissenschaften The Nature of Science, predate the previous record for oral and dental disease in a terrestrial vertebrate by nearly 200 million years.

"Not only does this fossil extend our understanding of dental disease, it reveals the advantages and disadvantages that certain creatures faced as their teeth evolved to feed on both meat and plants," says Reisz. "In this case, as with humans, it may have increased their susceptibility to oral infections."

The researchers investigated the jaws of several well-preserved specimens of Labidosaurus hamatus, a 275-million-year-old terrestrial reptile from North America. One specimen stood out because of missing teeth and associated erosion of the jaw bone. With the aid of CT-scanning, Reisz and colleagues found evidence of a massive infection. This resulted in the loss of several teeth, as well as bone destruction in the jaw in the form of an abscess and internal loss of bone tissue.

As the ancestors of advanced reptiles adapted to life on land, many evolved dental and cranial specializations to feed more efficiently on other animals and to incorporate high-fiber plant leaves and stems into their diet. The primitive dental pattern in which teeth were loosely attached to the jaws and continuously replaced, changed in some animals. Teeth became strongly attached to the jaw, with little or no tooth replacement. This was clearly advantageous to some early reptiles, allowing them to chew their food and thus improve nutrient absorption. The abundance
'/>"/>

Contact: Nicolle Wahl
nicolle.wahl@utoronto.ca
905-569-4656
University of Toronto
Source:Eurekalert  

Page: 1 2

Related biology news :

1. Mississauga teacher awarded prize for excellence in teaching genomics
2. Disrupting a destructive duo: U of T Mississauga researchers inhibit cancer proteins
3. Nationwide study finds US meat and poultry is widely contaminated
4. New study finds stronger regulations of in vitro fertilization may save lives
5. Study: Algae could replace 17 percent of US oil imports
6. Scots carbon emissions could be halved in decades, study suggests
7. Alcohol helps the brain remember, says new study
8. Study provides new way to classify E. coli bacteria and test for fecal contamination
9. UNC study helps clarify link between high-fat diet and type 2 diabetes
10. Clinical study suggests estrogen levels and breast health can be altered
11. New genetic study helps to solve Darwins mystery about the ancient evolution of flowering plants
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Reptilian root canal: U of T Mississauga study reveals infection in jaw of ancient fossil
(Date:7/9/2014)... new study shows that some shark species may be able ... may come with rising temperatures. , The Arctic today is ... it wasn,t always like that. Roughly 53 to 38 million ... the Arctic was more similar to a huge temperate forest ... including ancestors of tapirs, hippo-like creatures, crocodiles and giant tortoises. ...
(Date:7/9/2014)... U.S. may be on the verge of an economy driven ... cleaner than coal and is undergoing a production boom. It ... but recent research is casting serious doubts over just how ... & Engineering News (C&EN), the weekly news magazine of ... a senior correspondent at C&EN, explains that when burned as ...
(Date:7/9/2014)... and N-methyl-D-aspartate receptor antagonists can alleviate the ... affect irreversible cognitive dysfunction and effectively scavenge ... beta peptide (Aβ) vaccines reduced and eliminated ... transgenic mouse model, and significantly improved behavioral ... his team, First Affiliated Hospital of China ...
Breaking Biology News(10 mins):Shark teeth analysis provides detailed new look at Arctic climate change 2Shark teeth analysis provides detailed new look at Arctic climate change 3
... can pay big dividends to aging baby boomers who want ... division of geriatric medicine at Saint Louis University, in a ... of life as we age. Living well and feeling ... your lifetime is priceless, says Morley, who is coauthor of ...
... have devised a novel way to create tiny colonies ... organ. The work could allow better screening of new ... reduce the costs associated with their development. Liver ... pull drugs off the market. These dangerous drugs slip ...
... NASA study estimates that most ground-level particulate pollution in ... America and only a small amount is brought to ... Researchers using an innovative global aerosol tracking model have ... sources and movements of aerosols near the ground where ...
Cached Biology News:Eat chocolate, drink wine, add fun to life: SLU geriatrician shares secrets of staying young 2Eat chocolate, drink wine, add fun to life: SLU geriatrician shares secrets of staying young 3Eat chocolate, drink wine, add fun to life: SLU geriatrician shares secrets of staying young 4MIT: 'Micro' livers could aid drug screening 2MIT: 'Micro' livers could aid drug screening 3Local sources major cause of US near-ground aerosol pollution 2
(Date:1/14/2014)... (PRWEB) January 14, 2014 Date: Friday, April ... Location: Warrington Country Club, 1360 Almshouse Road, Warrington, Pa. ... nonprofit organization solely dedicated to finding a cure for hepatitis ... worldwide, will host its annual Crystal Ball on Friday, April ...
(Date:1/14/2014)... , Jan. 14, 2014 As pet owners drew up ... many of them wrote: "Take better care of my furry companion." ... designer clothes and top-brand carrying cases to take the little canine ... might also feel compelled to buy some pricey toys at the ...
(Date:1/14/2014)... iLab Solutions, the leader in core facility ... of Product Strategy. In this role, Michelle will work with ... guide in the development of iLab products. Her main goal ... benefit to the scientific community by offering the most advanced, ...
(Date:1/14/2014)...   Kinaxis ®, provider of RapidResponse ®, a cloud-based ... planning ( S&OP ) service, is proud to be a ... be held at the Hilton San Diego Bayfront, January 30 ... Elisabeth Kaszas , Director of Supply Chain at Amgen, as ...
Breaking Biology Technology:Hepatitis B Foundation to Host Annual Crystal Ball Gala 2New Year's Resolution: Give Pets the Gift of Top-Notch Health Care 2iLab Solutions Announces Michelle Detwiler as the New Director of Product Strategy 2Event Alert: Kinaxis Customer to Present at the Biomanufacturing Summit "Supply Chain: Improving Network Effectiveness" 2
... Cardium Therapeutics (Amex:,CXM) announced today that Richard A. ... is an early pioneer of coronary stent,technology and is ... stent, the Palmaz-Schatz stent. Dr. Schatz is Research Director ... at,Scripps Clinic in La Jolla, California. He is also ...
... ... in Rockville, MD, ... NVAX ), the State of Maryland and Montgomery County ... the company,s headquarters in Rockville, Maryland. The 5,000,square-foot, $5 million ...
... "Anatomy of a Deal - BioMS Medical and Eli ... - BioMS Medical Corp (TSX: MS),a leading developer in ... Kevin Giese, President and CEO, BioMS Medical and Buu ... will take part in a speciality panel session at ...
Cached Biology Technology:Richard A. Schatz, M.D. Joins Cardium's Scientific Advisory Board 2Richard A. Schatz, M.D. Joins Cardium's Scientific Advisory Board 3Richard A. Schatz, M.D. Joins Cardium's Scientific Advisory Board 4Novavax Opens Its First U.S. Vaccine Plant 2Novavax Opens Its First U.S. Vaccine Plant 3Novavax Opens Its First U.S. Vaccine Plant 4BioMS Medical to Participate in Speciality Panel Session at BioFinance 2008 2BioMS Medical to Participate in Speciality Panel Session at BioFinance 2008 3
DAPI: 4', 6-Diamino-2-phenylindole dihydrochloride. Antifade Solution: p-Phenylenediamine and glycerol in PBS solution. 0.4g/mL DAPI suspended in Antifade....
Anti-Mouse Qa.m8, Ascites (Clone 5035-24.1) (mouse IgG3)...
... the 9, 10, 12, and 13 positions. It ... for the quantification of 13(S)-HODE by GC- or ... linoleic acid with plant and mammalian lipoxygenases. It ... tumor cells to the endothelium at concentrations around ...
...
Biology Products: