ISSN 2398-2950      

Dental radiography: overview

ffelis

Introduction

  • Essential for viewing the largest part of the teeth/roots and supporting structures which are hidden below gum line.
  • The roots and periodontium form the biggest portion of each tooth and can only be fully visualized by means of intra-oral radiographs.
  • The roots and periodontium are where much pathology will form.
  • As result up to 70% of the pathology in the mouth may go undetected without the use of intra-oral radiography.
  • Some lesions may be detected clinically but the full extent of the lesion or disease can only be accurately assessed with radiographs, eg feline odontoclastic resorptive lesions ('neck'/resorptive' lesions) Odontoclastic tooth resorption (resorptive lesions).
  • With the high incidence of feline odontoclastic resorptive lesions, feline dentistry should not be performed without the use of radiography.
  • Approximately 70% of cats over 3 years of age have some form of dental disease.

Technique

  • Intra-oral radiography Radiography: intra-oral parallel and bisecting angle (film inside mouth) allows an accurate representation of each tooth providing fine detail that would otherwise be missed.
  • Using an extra-oral technique Radiography: dental extra-oral parallel results in superimposition of structures and lower resolution images.
  • Two techniques are used:
    • Parallel technique: the film is placed parallel to the tooth structure to be radiographed Dental radiography: intra-oral placement of dental film . This is only possible for mandibular premolars and molars. The x-ray beam is then directed at 90º to the x-ray film. 
    • Bisecting angle technique Dental radiography: bisecting angle technique 01 - left maxillary canine  Dental radiography: bisecting angle technique 02 - right mandibular canine : when the film cannot be placed parallel to the tooth strucutre to be radiographed (ie all incisors, canines, maxillary premolars/molars) an imaginary line is drawn dividing in half the angle between the tooth and the film. The x-ray beam is then directed at 90º to this 'bisecting angle' line.

Uses

  • Endodontics:
    • To assess loss of attachment, receding bone height relative to cemento-enamel junction, and bony pockets.
    • Assess suitability, eg absence of long axis fracture.
    • Planning the technique (endodontics).
    • Intra-operatively and post-operatively to assess pulp canal length, width and complications.
    • Check whether the pulp cavity has been breached.
  • Extractions Dental extraction:
    • Diagnosis and treatment planning of fractured teeth Dental fracture and surrounding tissues.
    • Post-extraction of teeth to check that all root tissue is extracted.
  • Detection of missing permanent teeth.
  • To differentiate permanent from temporary teeth.
  • Diagnosis of neoplasia, dentigerous cysts.

Advantages

  • Relatively standard procedure.
  • Equipment available in most practices.

Procedure

  • 15-30 min depending on skill of radiographer and views required.

Requirements

This article is available in full to registered subscribers

Sign up now to obtain ten tokens to view any ten Vetlexicon articles, images, sounds or videos, or Login

Preparation

This article is available in full to registered subscribers

Sign up now to obtain ten tokens to view any ten Vetlexicon articles, images, sounds or videos, or Login

Procedure

This article is available in full to registered subscribers

Sign up now to obtain ten tokens to view any ten Vetlexicon articles, images, sounds or videos, or Login

Further Reading

Publications

Refereed papers

Other sources of information

  • Smithson A (2006) Oral radiology Part 2. UK Vet 11 (1), 40-44.
  • Smithson A (2005) Oral radiology Part 1. UK Vet 10 (8), 57.
  • Gorrel C (2004) Veterinary Dentistry for the General Practitioner. Saunders.
  • Mulligan, Allen, Williams (1998) Atlas of canine and feline dental radiography. In: Veterinary Learning Systems. Trenton, NJ, USA (Excellent reference for dental radiography).

Related Images

Want more related items, why not
contact us

Can’t find what you’re looking for?

We have an ever growing content library on Vetlexicon so if you ever find we haven't covered something that you need please fill in the form below and let us know!

 
 
 
 

To show you are not a Bot please can you enter the number showing adjacent to this field

 Security code