Pulp response to bases and cavity depths
Lee, S.J.; Walton, R.E.; Osborne, J.W.
American Journal of Dentistry 5(2): 64-68
1992
ISSN/ISBN: 0894-8275 PMID: 1524748 Document Number: 396608
In cavities of ferret canines, preparation depth and bases were compared as to their effect on odontoblasts and to rate of dentin formation. These were measured by injecting 3H-proline at 0, 20 and 40 days post-preparation. Odontoblast activity was determined by label density in each band; inter-band distances indicated the amount of dentin formed. Correlations were by Pearson's coefficient. The following were determined: 1) cavity depth (remaining dentin thickness) was the major factor in odontoblast response and in dentin formation; deeper cavities suppressed odontoblasts with less subsequent dentin formation at all time periods; 2) basing materials had little effect on odontoblast activity or on the rate of dentin formation. An exception was in deep cavities, with Ca(OH)2 showing more label; this activity was temporary with no increased dentin formation; 3) there was no evidence of a "rebound" response.