extension form

ex·ten·sion form

the extension of the cavity preparation outline form to include areas of incipient carious lesions; this extension provides a dental restoration with margins that are self-cleansing or easily cleaned.

ex·ten·sion form

(eks-tenshŭn fōrm) Extension of cavity preparation outline form to include areas of incipient carious lesions; provides a dental restoration with margins that are self-cleansing or easily cleaned.