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Functional alterations in pulpal microcirculation in response to various dental procedures and materials
S Kim1, J E Dörscher-Kim, M Liu
1Laboratory of Oral Physiology, Columbia University, School of Dental and Oral Surgery, New York.
Proceedings of the Finnish Dental Society. Suomen Hammaslaakariseuran Toimituksia
|January 1, 1992
Summary
Dental restorative procedures significantly impact pulpal blood flow (PBF). Dry preparation reduces PBF, while water spray minimizes damage. Epinephrine in anesthetics also severely decreases PBF, highlighting critical factors in maintaining pulp vitality.
Area of Science:
- Dental research
- Microcirculation studies
- Restorative dentistry
Background:
- Pulpal microcirculation is vital for tooth vitality.
- Restorative procedures can potentially compromise pulp health.
- Understanding the impact of dental materials and techniques is crucial.
Purpose of the Study:
- To investigate the effects of restorative procedures on pulpal blood flow (PBF).
- To assess the influence of remaining dentin thickness (RD) and water spray during preparation.
- To evaluate the impact of impression materials and anesthetics on pulp circulation.
Main Methods:
- Quantitative 15-micron microsphere injection method in dog canine teeth.
- Intravital microscopy in rat incisor teeth.
- Comparison of different restorative techniques, impression materials, and anesthetics.
Main Results:
- Dry crown preparation with reduced remaining dentin thickness (RD) significantly decreased PBF.
- Copious water spray during preparation to 1 mm RD had a negligible effect on PBF.
- Dry preparation exceeding 50% RD increased shunt vessel activity, suggesting a compensatory mechanism.
- Epinephrine-containing anesthetics caused a severe reduction in PBF, irrespective of administration method.
Conclusions:
- Dry deep tooth preparation is detrimental to pulpal blood flow.
- Water spray is essential during preparation to preserve pulp circulation.
- Shunt vessel activation may be a compensatory response to pulp inflammation.
- Epinephrine in local anesthetics significantly impairs pulpal microcirculation.