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Micro-CT of a Shark Tooth

Image of the Month: Shark Tooth – September 2014
Take a bite of this!

In honor of Shark Week, the images shown are from a 16mm x 21mm fossilized shark tooth that was discovered by Dr. Luke Beggs and his wife Emily.  Sharks lose and replace >10,000 teeth over their lifespan.  This tooth and many others like it were found in Hogtowne Creek located in the Loblolly Nature Preserve in Gainesville, Florida.  Fossilized shark teeth are prevalent in this area and throughout the numerous river beds of North Central Florida.  Don’t worry, this doesn’t mean you have to watch out for sharks when tubing any of the beautiful rivers and springs in Florida (ha!).  Instead, the fossilized shark teeth in this area were encased in limestone and likely persist from when Florida was underwater several million years ago.  Note the visible serrations on the surface images and the radiating central pulp canal that is visible on the internal image.

The image was produced using a Bruker Skyscan 1172 high resolution three dimensional MicroCT.  Total scan time was 120 minutes and was performed using 80kVP/120uA, 0.5mm aluminum filter, 2K camera resolution, 13.1µm voxel size, 0.5° rotation step, and 180° tomographic rotation.

Images were acquired by Alex Balaez and Joshua Yarrow, MS, PhD, Research Service, Department of Veterans Affairs Medical Center, North Florida/South Georgia Veterans Health System, Gainesville, FL

Have an interesting sample you would like to share as an image of the month?  Feel free to e-mail: brandon@microphotonics.com to submit a write-up and images.

Scan Specifications:

System
SkyScan 1172 Micro-CT

Voltage
80kV

Current
120µA

Filter
Al 0.5mm

Pixel Size
13.1um

Rotation Step
0.5

Software
NRecon, DataViewer, CTvox

Location
Department of Veterans Affairs Medical Center, North Florida/South Georgia Veterans Health System, Gainesville, FL

Courtesy of
Alex Balaez and Joshua Yarrow, MS, PhD, Research Service

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