Is this a cavity in my wisdom tooth?

Answer: Cavity in wisdom tooth

By Sarah h
Dental Professional

Unfortunately, there are only 3 ways to detect dental caries.  First is with a dental instrument known as an explorer, the sharp point at the working end of the instrument can detect a softening in the enamel.  Second, is with dental radiographs, both traditional and digital films are used to detect dental caries, especially interproximally (between the teeth).  Third is the use of digital fluorescence, such as a KaVo diagnodent. Normal healthy tooth structure produces little to no fluorescence, while carious tooth structure will fluoresce proportionate to the degree of the caries.  

It is possible that your resin restoration is stained or may have come out and the underlying tooth structure, dentin, is a darker shade than the harder enamel covering the surface.  Continue with good oral hygiene habits, brushing twice daily and flossing at least once.  Limit high sugar and sticky foods until you see your dentist.  It is best to be proactive and take care of a small cavity when it is diagnosed.  Not only is the procedure less involved, but is usually less costly as well.  Resin restorations usually last 5-10 years, so it may be time to have it replaced.