Oral and Dental Tolerance and Efficacy on Dentinal Hypersensitivity of a Dental Gel, on Adults

Inclusion Criteria: * Male or female * Aged between18 and 70 years included * Having signed his/her written informed consent, * If it is a woman of childbearing potential : Must have been using an effective method of contraception Negative Urine pregnancy test at inclusion, * Subject who can be reached in case of emergency, * Subject willing to be compliant to the protocol, * Subject able to fill out the daily log and the questionnaire. * Subject with at least 20 natural teeth (especially on the studied teeth), * Subject with an healthy gum status according to the investigator, * Subject with a mild to moderate dentinal hypersensitivity on at least 2 hypersensitive non adjacent teeth: with a Schiff cold air index from 1 to 2 * Subjects who show a response typical of sensitivity to the cold air blast at visit 1. Exclusion Criteria: * Subject participating to any other biomedical research projects, * For women : Pregnant or breastfeeding, * Has forfeited his/her freedom by administrative or legal award or is under guardianship, * Subject who, in the judgement of the investigator, is not likely to be compliant during the study, * Subject unable to understand the information given (for linguistic or psychiatric reasons) and to give his/her consent in writing, * Subject having dental braces * Subject having immune system disorder, * Subject having asthma, * Subject having a disease liable to interfere with study data according to the investigator, * Subject with teeth showing evidence of facets of attrition, premature contact, cracked enamel on the tooth to be studied and adjacent teeth, * Subject with teeth showing evidence of irreversible pulpitis and active periodontal disease, * Subject having caries on the tooth to be studied and adjacent teeth * Subject having restauration of any type in the tooth to be studied, * Subject having occlusal overload or occlusal adjustment recently made in the tooth to be studied, * Subject with crowns , bridges in the area of sensitivity, * Subject had undergone professional desensitizing therapy during the 3 previous months, * Subject having a cutaneous-mucosal disease liable to interfere with study data according to the investigator, especially: herpes or medical history herpes, aphtous and medical history of aphtous, lichen planus, chronic lupus erythematosis, * Subject having undergone surgery, chemical or physical treatment to the concerned study area in the last 3 months, * Subject allergic or intolerant to one of the components of the study product, * Subject having a background of intolerance or allergy to cosmetics, drugs or to other substances (fruits, lactose intolerant, nuts, etc.), * Subject planning to have any dental care during the study. * Subject having a treatment liable to interfere with study data (aspirin or derivatives, anti-inflammatories, and other analgesic, antibiotics, antihistaminics, corticoids, desensitizing substances, immunosuppressants, calcic inhibitors and anticonvulsants) 2 days before the inclusion visit, * Subject having used of over the counter product for dentinal hypersensitivity within the previous six weeks, * Subject being vaccinated (4 weeks prior) or expecting to be vaccinated during the study, * Subject having modified his/her cosmetic habits (on the areas concerned by the study) during the last 2 weeks, * Subject having applied any local product the day of the inclusion visit on the study area except the usual toothpaste