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===Laboratory Tests===
===Dental Examination===
Examination of the tooth surface may reveal a 'white spot' (early lesions) or a brown/grey discolouration (advanced lesions) of the tooth surface. Severe lesions may present with a cavitation of the tooth surface.
A sharp dental probe can be gently used to identify defects in the tooth surface. The probe will stick when removed from a carious lesion due to the softened dentine.
===Diagnostic Imaging===
===Diagnostic Imaging===
Radiographs of the tooth may show a radiolucency within the tooth or below the occlusal surface. The extent of lesions may be underestimated as a 40% loss of mineral content is required before a radiolucency is seen on a radiograph. In addition this means that advanced lesions are also more difficult to interpret.
Radiographs of the tooth may show a radiolucency within the tooth or below the occlusal surface. The extent of lesions may be underestimated as a 40% loss of mineral content is required before a radiolucency is seen on a radiograph. In addition this means that advanced lesions are also more difficult to interpret.