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

Sponsor

University of Zagreb (Other)

Overall Status

Recruiting

CT.gov ID

NCT05596149

Collaborator

University of Split, School of Medicine (Other)

Enrollment

Location

Arms

Anticipated Duration (Months)

6.7

Patients Per Site Per Month

Study Details

Study Description

Brief 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.

Condition or Disease	Intervention/Treatment	Phase
DNA Damage	Other: Toothpaste without fluoride Other: Toothpaste with sodium fluoride Other: Toothpaste with sodium monofluorophosphate Other: Toothpaste with amine fluoride	N/A

Study Design

Study Type:

Interventional

Anticipated Enrollment :

80 participants

Allocation:

Randomized

Intervention Model:

Parallel Assignment

Masking:

None (Open Label)

Primary Purpose:

Basic Science

Official Title:

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

Anticipated Study Start Date :

Nov 1, 2022

Anticipated Primary Completion Date :

Feb 1, 2023

Anticipated Study Completion Date :

Nov 1, 2023

Arms and Interventions

Arm	Intervention/Treatment
Active Comparator: Toothpaste without fluoride A group of participants that will be using toothpaste without fluoride.	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.
Experimental: Toothpaste with sodium fluoride A group of participants that will be using toothpaste with sodium fluoride.	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.
Experimental: Toothpaste with sodium monofluorophosphate A group of participants that will be using toothpaste with sodium monofluorophosphate.	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.
Experimental: Toothpaste with amine fluoride A group of participants that will be using toothpaste with amine fluoride.	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.

Outcome Measures

Primary Outcome Measures

Number of patients with cytotoxic and genotoxic effect of fluoridated toothpastes in buccal cells, assessed by micronucleus test [90 days]
The micronucleus test is used to determine whether a compound is genotoxic by assessing the presence of micronuclei. Micronuclei can originate from chromosome fragments or whole chromosomes that cannot migrate to the poles during the anaphase phase of cell division. This test is widely used for monitoring buccal cells because of its precision for detecting chromosomal damage. The cells of the buccal mucosa will be taken with a cytological brush, the cell suspension is centrifuged, then applied to a microscope slide and fixed with methanol. The slides will be stained with Fast Green FCF dye and analyzed with an epifluorescence microscope.

Eligibility Criteria

Criteria

Ages Eligible for Study:

18 Years to 70 Years

Sexes Eligible for Study:

All

Accepts Healthy Volunteers:

Yes

Inclusion Criteria:

age of 18 and older
good oral and general health
non smokers

Exclusion Criteria:

subjects suffering from infectious diseases or chronic inflammatory diseases
use of antibiotics, corticosteroids and anti-inflammatory drugs in the last six months
damage to the mucous membrane of the oral cavity
subjects who have fixed-prosthetic works and orthodontic braces