Month: November 2011

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Case of the Week: Dentigerous cyst

This week is a case of a quite large dentigerous cyst.  A dentigerous cyst will appear radiolucent surrounding the crown of an impacted tooth.  The teeth most commonly effected are the maxillary canines and third molars (both maxilla and mandible).  A pathognomonic sign of a dentigerous cyst is that the…
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Digital radiography: Spatial resolution

This weeks topic on digital radiography is spatial resolution.  Spatial resolution is the capacity for distinguishing fine detail in an image.  The term used to identify this is line pairs per millimeter (lp/mm).  The higher the spatial resolution, the greater the capacity for distinguishing fine detail.  An average observer is…