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Dental Radiology

Accurate diagnosis has also been an important part of correct treatment planning. In dentistry too, radiology services are been regularly and routinely used to establish a diagnosis of tooth decay, infections in the bone, bone loss as in periodontal diseases or changes in bone density. Infact, it is an inseparable part for any dental setup now.

Both intraoral film placed inside the mouth) and extraoral views are used for diagnosis.

Periapical view

It is one of the most commonly used views. It displays both the tooth and it's supporting structures. Used to determine infection around a tooth and hence the need for a root canal/ extraction.



Bitewing view

These are normally used as screening x-rays to determine decay in the areas where 2 posterior teeth join each other and also to see bone level in these areas.

Occlusal view: this view is normally used to determine the extent of any infection, position of any unerupted tooth or presence of stone in salivary gland of the mouth.

Full mouth series
It consists of 18 intraoral X-rays taken of a patients' teeth and adjacent hard tissue:

  • four bitewings
  • eight posterior periapicals
  • six anterior periapicals

Extra oral views of dental concern are OPG, cephalograms and Cone Beam CT(CBCT)

OPG

This panoramic view is used for screening purpose or to determine the extent of large lesions not coverable by intraoral views



CBCT(Cone Beam CT)

This is a relatively new entry in the dental radiology arena. It is however a very accurate diagnostic tool in the maxillofacial area. In fact it has now become indispensable for treatment planning in dental implant cases( particularly sinus lifts and CT guided implant surgery), for judging the exact extension of pathology and infection and even for localizing the position of thirds molar with respect to vital structures around. It can even be used to detect an extra root canal or root in a tooth.  Truly the diagnostic part in dentistry had been revolutionized by the advent of CBCT.



Cephalogram

Used for treatment planning of orthodontic cases



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