Assessment of the Cytotoxic and Genotoxic Effect of Toothpastes With Different Forms of Fluoride on the Buccal Mucosa

Summary

The remarkable therapeutic anticaries effect of fluoride is well recognized, but in recent years, toxic effects on the oral mucosa have been discussed. So far, many in vivo studies examining the genotoxic and cytotoxic effect of fluoride in human cells (lymphocytes, bone marrow, germ cells) have been carried out, but there are no studies examining the effect of fluoride on cells of the buccal mucosa. In vitro studies have shown that sodium fluoride can be toxic to fibroblasts of the oral mucosa by inhibiting protein synthesis, suppressing mitochondrial function and consequently reducing the amount of intracellular ATP.

The study would include 80 participants, aged between 18 and 75. All subjects would use the same toothpaste without fluoride for the first month, and then they would be randomly divided into four groups, where three groups would receive a toothpaste with fluoride with one of the active substances (sodium fluoride, sodium monofluorophosphate, amine fluoride) for the next 60 days, while the control group would continue to use the toothpaste without fluorine. Swabs of the buccal mucosa would be taken at 0 (before the start of use) and 30, 45 and 60 days after the start of using the tested toothpastes.

The aim of this research would be to examine the cytotoxic and genotoxic effect of toothpastes containing fluoride with different active substances and to compare their effect. As a measure of genotoxicity and cytotoxicity in cells, the micronucleus test will be used.

Conditions

• DNA Damage

Interventions

OTHER

Toothpaste without fluoride

A sample of cells from the area of the buccal mucosa of each of the subjects will be taken with a cytological brush just before the start of using the toothpaste without fluoride and 30, 45 and 60 days after the start of use. Cell suspension is applied on a microscopy slide. Slides will be stained with Fast Green FCF dye and analyzed with an epifluorescence microscope. After using each tested toothpaste, the respondents will be given a specially designed questionnaire with questions related to their opinion about the used oral hygiene product.

OTHER

Toothpaste with sodium fluoride

A sample of cells from the area of the buccal mucosa of each of the subjects will be taken with a cytological brush just before the start of using the toothpaste with sodium fluoride and 30, 45 and 60 days after the start of use. Cell suspension is applied on a microscopy slide. Slides will be stained with Fast Green FCF dye and analyzed with an epifluorescence microscope. After using each tested toothpaste, the respondents will be given a specially designed questionnaire with questions related to their opinion about the used oral hygiene product.

OTHER

Toothpaste with sodium monofluorophosphate

A sample of cells from the area of the buccal mucosa of each of the subjects will be taken with a cytological brush just before the start of using the toothpaste with sodium monofluorophosphate and 30, 45 and 60 days after the start of use. Cell suspension is applied on a microscopy slide. Slides will be stained with Fast Green FCF dye and analyzed with an epifluorescence microscope. After using each tested toothpaste, the respondents will be given a specially designed questionnaire with questions related to their opinion about the used oral hygiene product.

OTHER

Toothpaste with amine fluoride

A sample of cells from the area of the buccal mucosa of each of the subjects will be taken with a cytological brush just before the start of using the toothpaste with amine fluoride and 30, 45 and 60 days after the start of use. Cell suspension is applied on a microscopy slide. Slides will be stained with Fast Green FCF dye and analyzed with an epifluorescence microscope. After using each tested toothpaste, the respondents will be given a specially designed questionnaire with questions related to their opinion about the used oral hygiene product.

Sponsors & Collaborators

• University of Split, School of Medicine

  collaborator OTHER

• University of Zagreb

  lead OTHER

Study Design

Allocation

RANDOMIZED

Purpose

BASIC_SCIENCE

Masking

NONE

Model

PARALLEL

Eligibility

Min Age

18 Years

Max Age

70 Years

Sex

ALL

Healthy Volunteers

Yes

Timeline & Regulatory

Start

2022-11-01

Primary Completion

2023-02-01

Completion

2023-11-01

Countries

• Croatia

Study Locations