Dental Radiograph

An x-ray film consists of an acetate sheet coated on both sides with photographic emulsion. X-ray precipitates silver and in effect blackens the film.

A dental radiograph has the following areas:
1. blackened area where only air is interposed between the beam and film.
2. soft tissue area, where soft tissue absorb part of the x-ray.
3. calcium salts in bone absorbs x-rays, leaving the film lightly exposed.
4. teeth area, enamel and dentin which absorbs even more x-rays which leave little or no silver precipitated in the emulsion.

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