Effectiveness of nano-hydroxyapatite toothpaste in reducing dentin hypersensitivity: a double-blind randomized...

Area of Science:

• Dental Science
• Biomaterials
• Clinical Research

Background:

• Dentin hypersensitivity is a common dental condition causing pain.
• Existing treatments include fluoride, but novel agents are sought.
• Nano-hydroxyapatite (nHA) shows potential for dentin remineralization and occlusion.

Purpose of the Study:

• To compare the efficacy of a nano-hydroxyapatite (15%) toothpaste against a fluoride toothpaste and a placebo.
• To evaluate the desensitizing effect on dentin hypersensitivity.
• To assess relief at 2 and 4 weeks post-treatment.

Main Methods:

• Double-blind randomized clinical trial with 105 participants.
• Three groups: 15% nano-hydroxyapatite (fluoride-free), fluoride toothpaste, and placebo.
• Sensitivity assessed via airblast, tactile tests, and visual analog scale (VAS) at baseline, 2, and 4 weeks.

Main Results:

• The nano-hydroxyapatite group showed significantly lower cold air and tactile sensitivity (P<.001) at 2 and 4 weeks.
• Compared to both fluoride and placebo groups, nano-hydroxyapatite demonstrated statistically significant superior results (P<.001).
• VAS scores significantly decreased in the nano-hydroxyapatite group compared to baseline and controls (P<.001).

Conclusions:

• Nano-hydroxyapatite in a fluoride-free toothpaste is an effective desensitizing agent.
• It provides rapid relief from dentin hypersensitivity symptoms.
• Supports the use of nano-hydroxyapatite for managing dentin hypersensitivity.