Dentin permeability: Effects of crown preparation

D. Richardson, L. Tao, David H. Pashley

Research output: Contribution to journalArticlepeer-review

71 Scopus citations


Sequential crown reductions of extracted human teeth were made to evaluate both regional differences in dentin permeability and the effects of tooth reduction. Two different methods of tooth reduction were used. In group 1, tooth reduction was nonuniform but was done in a manner similar to conventional crown preparations. Maximum, total crown permeability was measured using a pressurized fluid filtration technique after removing the smear layer. Regional reductions in permeability were accomplished by creating smear layers on mesial, distal, buccal, lingual, and occiusal surfaces sequentially. Between each step, changes in dentin permeability were measured. In group 2, tooth reductions were uniform and regional permeability was reduced by localized application of potassium oxalate. Both methods demonstrated increased permeability of dentin as the prepared surfaces approached the pulp chamber. Generally, the mesial surfaces were more permeable than the distal surfaces. The occlusai and lingual surfaces were the least permeable regions.

Original languageEnglish (US)
Pages (from-to)219-225
Number of pages7
JournalInternational Journal of Prosthodontics
Issue number3
StatePublished - 1991
Externally publishedYes

ASJC Scopus subject areas

  • Oral Surgery


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