n Journal of Minimum Intervention in Dentistry - Minimal intervention in dentistry : some variations in cavity design

Volume 5, Issue 1
  • ISSN : 1998-801X


In about 1900 GV Black evolved a classification for caries lesions and specified the design for the cavity that should be prepared to eliminate the lesion and hopefully avoid a recurrence. He was not aware of the modern concept of caries as a bacterial disease. He regarded the union between restoration and natural tooth structure as being a weak area very subject to plaque accumulation and therefore subject to recurrence of the disease. On these grounds he suggested that the margin should always be placed out on the smooth tooth surfaces where it could be easily kept clean. That is, he decided that extension for prevention was an essential parameter in cavity design. The profession has followed his instructions with only minor variations until this time.

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