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Polarised LM of a Cracked Ceramic Dental Crown
18" x 12"
$40
$20
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Photographic Print

Dental crown Polarised light micrograph PLM of a longitudinal section through a cracked dental crown made of metal multicoloured and ceramic above metal If the top of a tooth is badly cracked decayed or broken it must be replaced by an artificial crown The remaining undamaged part of the tooth is cut down to a peg to receive the hollow crown This crown is then shaped to form a replica of the original tooth and cemented in place Here the crown has cracked during firing in a dental furnace This is because the ceramic and metal parts of the crown have different rates of expansion New dental ceramics must overcome this problem Magnification x at xcm size