Effectiveness of Nanohydroxyapetite Paste on Reducing Dentin Hypersensitivity

2016-10-19 02:38:21 | BioPortfolio


The aim of this study is to compare the efficacy of dentine hypersensitivity reduction using in office paste formula containing nanoHydroxyapatite with the commercially available fluoride (duraphat) and a placebo in treating hypersensitivity in a single visit.


Following the approval of the Research Ethics Committee of Riyadh college of Dentistry and Pharmacy (The Institutional Review Board), a randomized double blind single treatment controlled clinical trial will be carried out on 60 patients (-- males and -- females) between the age group of 18 to 45 years, visiting the out-patient clinics of Riyadh Colleges of Dentistry and Pharmacy during the period between October and December.

The protocols for the study will be developed as per the guidelines for the design and conduct of clinical trials on dentinal hypersensitivity and in accordance with the Declaration of Helsinki and Guidelines for Good Clinical Practice. Prior to the start of the study patients will be given both verbal and written information about the process and an appropriate signed informed consent form will be obtained.

Only subjects demonstrating two hypersensitive teeth that satisfied the tactile and airblast hypersensitivity enrolment criteria, qualified to participate in the study. Qualified subjects will be randomly defined to one of the three study groups in order to have 20 subjects per treatment group:

- Study 1: nanoXIM care paste, fluoride-free (test group)

- Study 2: fluoride paste

- Study 3: placebo group (positive control group).

Subjects selected will undergo thorough clinical examination, followed by oral prophylaxis, oral hygiene instructions and dietary counseling. After the teeth isolation with cotton rolls, changes in the dentin sensitivity to tactile (dental explorer), thermal stimuli (drops of melted ice) and air stimuli (blast from dental syringe) will be evaluated. Following application of the stimuli, responses will be evaluated and assessed by the Visual Analog Scale (VAS). The survey form will be completed by the examiner to have a baseline prior to paste application in the first visit. The survey contains five questions, rated on a 10-point scale, assessing:

1. Degree of pain.

2. Duration of pain.

3. Intensity of pain.

4. Tolerability of pain.

5. Description of pain.

Data Analysis

The study patients will be randomly assigned into 3 groups (N, F and P) equal groups of 20. The randomization process will be made using a computer-generated random table. Excel software (Micro- soft) will be used for randomization. The pastes used on the study labeled N, F and P respectively, will be completely wrapped not allowing the pastes applicant or any other member of the research team to know what test paste will be applied on the patients. The patients will be blinded by not letting them know which agents will be applied. The chief investigator, the first author in this study, will coordinate the entire trial and recruited the various operators for the same.

Study Design

Allocation: Randomized, Endpoint Classification: Efficacy Study, Intervention Model: Parallel Assignment, Masking: Double Blind (Subject, Caregiver), Primary Purpose: Treatment


Dentin Hypersensitivity


5% Sodium Fluoride Varnish, 15% Nanohydroxyapetite paste, Glycerol


Riyadh colleges of dentistry and pharmacy olaya campus
Saudi Arabia


Not yet recruiting


Riyadh Colleges of Dentistry and Pharmacy

Results (where available)

View Results


Published on BioPortfolio: 2016-10-19T02:38:21-0400

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Medical and Biotech [MESH] Definitions

A sodium fluoride solution, paste or powder, which has been acidulated to pH 3 to 4 and buffered with a phosphate. It is used in the prevention of dental caries.

A source of inorganic fluoride which is used topically to prevent dental caries.

An enzyme that catalyzes the formation of glycerol 3-phosphate from ATP and glycerol. Dihydroxyacetone and L-glyceraldehyde can also act as acceptors; UTP and, in the case of the yeast enzyme, ITP and GTP can act as donors. It provides a way for glycerol derived from fats or glycerides to enter the glycolytic pathway. EC

Adherent debris produced when cutting the enamel or dentin in cavity preparation. It is about 1 micron thick and its composition reflects the underlying dentin, although different quantities and qualities of smear layer can be produced by the various instrumentation techniques. Its function is presumed to be protective, as it lowers dentin permeability. However, it masks the underlying dentin and interferes with attempts to bond dental material to the dentin.

Calcium fluoride. Occurring in nature as the mineral fluorite or fluorspar. It is the primary source of fluorine and its compounds. Pure calcium fluoride is used as a catalyst in dehydration and dehydrogenation and is used to fluoridate drinking water. (From Merck Index, 11th ed)

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