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Radiographic Interpretation.

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Presentation on theme: "Radiographic Interpretation."— Presentation transcript:

1 Radiographic Interpretation

2 Dental Radiography Questions
How does the radiographic examination contribute to the detection of caries? What factors may influence caries interpretation? What is the radiographic appearance of: incipient, moderate, advanced and severe caries?

3 Detection of Caries Clinical examination and radiographs are necessary to detect dental caries Radiographs enable the dental professional to identify carious lesions that are not visible clinically It also allows the dental professional to evaluate the extent and severity of carious lesions

4 Clinical Examination Some carious lesions can be detected simply by looking in the mouth, and others cannot The mirror can be used to reflect light, allow for indirect vision, and retract the tongue The explorer can be used to detect changes in consistency in pits, grooves, and fissures of teeth

5 Clinical Examination Color changes may be observed
Occlusal surfaces may show dark staining in fissures, pits, and grooves Smooth surfaces may exhibit a chalky white spot or opacity An interproximal ridge may appear discolored


7 Radiographic Examination
A carious area appears radiolucent because decreased density allows for greater penetration in the carious area The bite-wing radiograph provides the dental professional with the greatest amount of diagnostic information A periapical radiograph taken with paralleling technique may also be used

8 Factors Influencing Caries Interpretation
Radiographs must be of diagnostic quality Examples may include Improper horizontal angulation on a bitewing film Errors in exposure with improper contrast and density

9 Interproximal Caries Interproximal Between two adjacent surfaces
Typically seen on dental radiographs at or just below the contact point As caries progresses through the enamel, it typically assumes a triangular configuration When it reaches the DEJ, it spreads laterally and progresses through dentin Classified as incipient, moderate, advanced, and severe





14 Incipient Interproximal Caries
Extends less than halfway through the thickness of enamel An incipient or Class I lesion is seen only in enamel



17 Moderate Interproximal Caries
Extends more than halfway through enamel but does not involve the DEJ A moderate or Class II lesion is seen only in enamel



20 Advanced Interproximal Caries
Extends to or through the DEJ and into dentin, but does not extend into dentin more than half the distance toward the pulp An advanced or Class III lesion affects both enamel or dentin



23 Severe Interproximal Caries
Extends through enamel and dentin more than half the distance toward the pulp A severe or Class IV lesion involves both enamel and dentin and may appear clinically as a cavitation in the tooth



26 Occlusal Caries Caries that involve the chewing surface of posterior teeth “A thorough clinical exam is the method of choice for the detection of occlusal caries” Early occlusal caries is difficult to see on a dental radiograph





31 Incipient Occlusal Caries
Cannot be seen on a dental radiograph Must be detected with an explorer or DiagnoDent

32 Buccal and Lingual Caries
These are difficult to detect on radiograph because they are superimposed on tooth structure If seen on film, they appear as a circular radiolucent area



35 Root Surface Caries Ivolves only the roots of teeth
On radiograph, it appears as a cupped-out or crater-shaped radiolucency below the CEJ Early lesions may be difficult to detect on radiograph



38 Recurrent Caries Occurs adjacent to an existing restoration
It appears as a radiolucent area just beneath a restoration It is most often located beneath the interproximal margins of a restoration


40 Rampant Caries Advanced and severe caries affecting a number of teeth
Associated with children with poor diets and adults with decreased salivary flow







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