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Related Experiment Videos

Enamel rehardening by soft cheeses

I Lewinstein1, L Ofek, I Gedalia

  • 1Hadassah School of Dental Medicine, Hebrew University, Jerusalem, Israel.

American Journal of Dentistry
|February 1, 1993
PubMed
Summary

Soft cheeses significantly rehardened softened tooth enamel, with effects varying by cheese type and sweetness. This suggests cheese can help protect teeth against acid erosion.

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Area of Science:

  • Dental Science
  • Biomaterials Science
  • Food Science

Background:

  • Dental enamel demineralization is a significant oral health concern.
  • Acidic conditions, like those from citrus beverages, can soften and erode enamel.
  • Dietary factors may play a role in enamel remineralization.

Purpose of the Study:

  • To investigate the in situ rehardening effect of various soft cheeses on demineralized enamel.
  • To compare the rehardening potential of cheeses with that of natural saliva.
  • To assess the influence of cheese composition (pH, sweeteners) on enamel microhardness.

Main Methods:

  • Intraoral study using enamel slabs in orthodontic appliances.
  • Enamel slabs were softened using a citrus beverage (pH 3.3).
  • Rehardening was measured after 5-minute intraoral exposure to soft cheeses (unsweetened, sweetened) or saliva (control).

Main Results:

  • Significant rehardening of softened enamel was observed after chewing soft cheeses and with saliva secretion.
  • The rehardening potential of cheeses was significantly different compared to saliva.
  • Rehardening effect decreased in the order: unsweetened cheese, marmalade-flavored cheese, sucrose-sweetened cheese.

Conclusions:

  • Soft cheeses, despite their acidic pH, can promote enamel rehardening.
  • The rehardening effect is likely due to calcium and phosphate ion uptake from cheese.
  • Dietary interventions, including cheese consumption, may offer a protective strategy against enamel erosion.

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