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Remaining dentine thickness and human pulp responses.

P E Murray1, A J Smith, L J Windsor

  • 1Oral Biology Indiana University School of Dentistry, Indianapolis, IN 46202, USA. petmurra@iupui.edu

International Endodontic Journal
|March 27, 2003
PubMed
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Maintaining adequate remaining dentine thickness (RDT) is crucial for pulp vitality. A minimum RDT of 0.5 mm is recommended after cavity preparation and restoration to prevent pulp injury and inflammation.

Area of Science:

  • Dental materials science
  • Restorative dentistry
  • Pulp biology

Background:

  • Remaining dentine thickness (RDT) is a critical factor in protecting the dental pulp.
  • Understanding pulp responses to varying RDT is essential for successful cavity restorations.

Purpose of the Study:

  • To evaluate pulp responses in relation to remaining dentine thickness (RDT).
  • To determine the minimum RDT required to prevent pulp injury.

Main Methods:

  • Class V cavities were prepared in 49 teeth from 31 adolescent patients.
  • Cavities were restored with amalgam, calcium hydroxide, or zinc oxide eugenol.
  • Teeth were extracted at 3-89 days for histological analysis of pulp responses.

Main Results:

Related Experiment Videos

  • Odontoblast numbers decreased significantly with reduced RDT.
  • Reparative and reactionary dentine formation was observed, influenced by RDT and materials.
  • Pulp inflammation was not significantly affected by RDT in this study.

Conclusions:

  • Cavity RDT significantly impacts pulp vitality but has minimal effect on reactionary dentine secretion.
  • Gross tissue injury, especially pulp exposure, leads to poor pulp capping prognosis.
  • A minimum RDT of 0.5 mm is necessary to avoid observable pulp injury post-restoration.