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Related Experiment Videos

Salivary pH changes during 10% carbamide peroxide bleaching

R H Leonard1, C D Bentley, V B Haywood

  • 1Department of Dental Ecology, University of North Carolina, School of Dentistry, Chapel Hill 27599-7450, USA.

Quintessence International (Berlin, Germany : 1985)
|August 1, 1994
PubMed
Summary

This study found that using a 10% carbamide peroxide gel with a custom guard for teeth bleaching significantly increased salivary pH within 15 minutes, showing a safe effect on oral pH during nightguard vital bleaching.

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Area of Science:

  • Dental materials science
  • Oral biochemistry

Background:

  • Tooth bleaching is a common cosmetic procedure.
  • Nightguard vital bleaching involves placing bleaching agents in custom trays.
  • Understanding the interaction between bleaching agents and saliva is crucial for safety.

Purpose of the Study:

  • To evaluate the impact of 10% carbamide peroxide gel on salivary pH.
  • To assess salivary pH changes during nightguard vital bleaching with a custom-fitted guard.

Main Methods:

  • Salivary pH was measured at baseline (unstimulated and with an empty guard).
  • pH was monitored at 5-minute intervals after inserting a guard filled with 10% carbamide peroxide gel (Proxigel).
  • Measurements continued until salivary pH returned to baseline levels.

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Main Results:

  • Salivary pH initially showed a minor, statistically insignificant decrease.
  • Within 15 minutes, salivary pH significantly increased, peaking at 7.32.
  • Salivary pH remained above baseline for the initial measurement period and did not drop significantly below baseline within the first 2 hours.

Conclusions:

  • 10% carbamide peroxide gel used with a custom guard for nightguard vital bleaching causes a significant increase in salivary pH.
  • The use of this bleaching agent with a custom guard does not lead to a significant detrimental drop in salivary pH in the short term.