A non cavitated caries is the first clinically notable sign of the disease. Demineralization of hard dental tissues has reached the level when it can be seen with the naked eye but without a visible breakdown of dental enamel.
Under the microscope a variety of different irregularities can be observed:
- Destroyed perikymata pattern
- Minor cracks and fractures
- Microcavities
- Scratches
Histologically it appears as a wedge shaped (, ) defect with the base at enamel surface.
The shape of the non cavitated lesion is determined by the distribution of the microbial deposits.
TYPICAL LOCATION
- Approximal surfaces involves an interdental facet area toword the gingival margin, possible extentions buccally and lingually.
- Occlusal surfaces natural pitts and fissures are the most vulnerable () sites. The process starts in the deepest parts of the groove fossa system, depending on tooth specific anatomy
- Smooth surfaces along the gingival margin
PATIENT COMPLAINS
- No pain
- Aesthetical discomfort especially in anterior teeth
CLINICAL APPEARANCE
- ACTIVE LESION
· Whitish, Opaque, Chalky ()
· On smooth surfaces, close to gingival margin
· Coverd by plaque
- INACTIVE LESION
· Whitish, Yelowish, brownish
· Glossy and shiny
· On smooth surfaces with small distance from gingival margin
· Clean from plaque
DIAGNOSIS
· Gentle probing
o Active lesion feels rough
o Inactive feels smooth
· Dye method
· Radiograph detection conical shape in enamel, sometimes involve dentin
DIFFERENTIAL DIAGNOSIS enamel hypoplasia, dental fluorosis
