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Related Experiment Videos

In vitro buffering properties of 3 composite resins.

P Passi1, A Zadro, S Varotto

  • 1Department of Dental Materials, University of Padua, Padua, Italy. pietro.passi@unipd.it

Minerva Stomatologica
|April 27, 2004
PubMed
Summary

Dental composite resins Ariston pHc, P60, and Z100 were tested for their ability to buffer saliva. Ariston pHc showed a slight pH increase in acidified saliva, but none effectively buffered low salivary pH in vitro.

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Area of Science:

  • Dental Materials Science
  • Biomaterials Engineering
  • Restorative Dentistry

Background:

  • Dental composite resins are used in restorations.
  • Ariston pHc is purported to have a cariostatic effect via acid buffering.
  • This effect is attributed to alkaline glass releasing OH- ions at low pH.

Purpose of the Study:

  • To evaluate pH variations induced by Ariston pHc, P60, and Z100 composite resins.
  • To assess the in vitro cariostatic potential of these dental materials.

Main Methods:

  • Three composite resins (Ariston pHc, P60, Z100) were tested.
  • Specimens were immersed in artificial saliva and distilled water at varying pH levels (neutral, acidified, alkalized).
  • pH modifications were measured over 31 days.

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Main Results:

  • Ariston pHc significantly increased the pH of distilled water.
  • pH variations in artificial saliva were negligible for all resins.
  • A slight, statistically significant pH enhancement was observed in acidified saliva with Ariston pHc.

Conclusions:

  • None of the tested composite resins demonstrated effective in vitro buffering of low salivary pH.
  • Ariston pHc's ability to raise pH in distilled water and slightly in acidified saliva suggests a potential, though unproven, in vivo buffering effect.