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This will be a single centre, single blind, randomized, three treatment, three period crossover design, modified, in situ, study in healthy participants. In this in situ model the tubule occlusion properties of dentifrices will be evaluated by comparing an experimental dentifrice formulation to a regular fluoride dentifrice and a negative control (mineral water) over a ten day period.
Full description
This modified in situ model study will evaluate the mode-of-action of an experimental dentifrice containing stannous fluoride to occlude tubules compared to a regular fluoride dentifrice and a negative control (mineral water). The study treatments will be administered for a total of 10 days, with participants wearing two appliances in their mouth that will hold samples of dentine. The dentine samples will be examined after 1, 4, 8 and 10 days of treatment using scanning electron microscopy (SEM) and the resulting images graded for the amount of occlusion. In addition, the robustness of any occlusion generated by the treatments will be tested by exposing the dentine samples to an acid challenge (orange juice) after 9 and 10 days treatment.
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Inclusion criteria
Exclusion criteria
Current susceptibility to acid regurgitation, any orthodontic appliances, restorations, bridgework or dentures that in the opinion of the investigator would interfere with the study outcomes, recurrent or regular aphthous ulcers, severe gingivitis, carious lesions and periodontal disease,signs of severe dental erosion, any condition or medication which in the opinion of the investigator is currently causing xerostomia, and individuals who require antibiotic prophylaxis for dental procedures
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Allocation
Interventional model
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26 participants in 3 patient groups
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Data sourced from clinicaltrials.gov
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