NCT03637426

Effect of Nano-hydroxyapatite and LASER on Dentin Hypersensitivity

Effect of Nano-hydroxyapatite and Low-level Laser Therapy on Dentin Hypersensitivity Control: Clinical, Randomized, Double-blind, Placebo-controlled Study

• Status: Completed
• Phase: N/A
• Study type: Interventional
• Enrollment: 80 (actual)
• Sponsor: Universidade Federal do Para · Academic / Other
• Sex: All
• Age: 18 Years – 50 Years
• Healthy volunteers: Accepted

Summary

The aim of this study was to evaluate the effect of nanohydroxyapatite associated with low potency laser therapy in eliminating or reducing dentin hypersensitivity in a randomized placebo-controlled clinical trial. Volunteers 18 to 50 years old with hypersensitive teeth were randomized into 4 groups: GPLACEBO - positioning of the laser tip without light emission + placebo dentifrice; GnHAP - positioning of the laser tip without light emission + nano-hydroxyapatite; GLASER - laser tip positioning with light emission + placebo substance; GLASERnHAP - positioning by laser beam with light emission + nano-hydroxyapatite.

Detailed description

GLASER received the laser application using the infrared light spectrum with wavelength of 808 nm with its active AsGaAl medium in two points of the vestibular face of the hypersensitive teeth. It was applied at each point 60 J / cm², for 16 seconds. The laser was applied in 2 sessions with a time interval of 24 hours. GLASERnHAP first received laser application and then the application of nanohydroxyapatite according to the manufacturer's recommendations. Before initiating laser therapy, the equipment was calibrated with a tester (MMOptics Ltda®, São Carlos, SP, Brazil). The GnHAP volunteers were submitted to the application of Desensibilize Nano P on the vestibular surfaces of hypersensitive teeth with the aid of a Microbrush applicator (Microbrush, 3M ESPE, São Paulo, Brazil) for 10 minutes. Then, a rubber cup (Unid Microdont, São Paulo, SP, Brazil) mounted on a low speed handpiece (Dabi Atlante, Ribeirão Preto, SO, Brazil) was used to scrub the desensitizing gel on teeth for 20 seconds in each tooth, according to the manufacturer's specifications. GPLACEBO followed the same protocol used in Gn-HAP. In addition to the desensitization treatment, all GnHAP and GPLACEBO volunteers received the positioning of the laser tip to mimic the light emission produced in GLASER and GLASERnHAP. The noise emitted by the laser device during mimicry was simulated through the sound reproduction of a smartphone application (HD Voice Recorder - iPhone 6s, Apple®, Cupertino, California, USA).

Conditions

• Dentin Sensitivity

Interventions

Type	Name	Description
OTHER	Laser	GLASER received the laser application using the infrared light spectrum with wavelength of 808 nm with its active AsGaAl medium in two points of the vestibular face of the hypersensitive teeth. It was applied at each point 60 J / cm², for 16 seconds. The laser was applied in 2 sessions with a time interval of 24 hours.
OTHER	nano-hydroxyapatite	The GnHAP volunteers were submitted to the application of Desensibilize Nano P on the vestibular surfaces of hypersensitive teeth with the aid of a Microbrush applicator (Microbrush, 3M ESPE, São Paulo, Brazil) for 10 minutes. Then, a rubber cup (Unid Microdont, São Paulo, SP, Brazil) mounted on a low speed handpiece (Dabi Atlante, Ribeirão Preto, SO, Brazil) was used to scrub the desensitizing gel on teeth for 20 seconds in each tooth, according to the manufacturer's specifications
OTHER	Laser + nano-hydroxyapatite	GLASERnHAP first received laser application and subsequently the application of nanohydroxyapatite according to the manufacturer's recommendations.
OTHER	PLACEBO	In this group, a toothpaste without addition of fluoride or any other desensitizing agent (Natural, Contente®, Uberlândia, MG, Brazil) was applied to hypersensitive dentine. The GPLACEBO volunteers were submitted to the application of placebo dentifrice on the vestibular surfaces of hypersensitive teeth with the aid of a Microbrush applicator (Microbrush, 3M ESPE, São Paulo, Brazil) for 10 minutes. Then, a rubber cup (Unid Microdont, São Paulo, SP, Brazil) mounted on a low speed handpiece (Dabi Atlante, Ribeirão Preto, SO, Brazil) was used to scrub the desensitizing gel on teeth for 20 seconds on each tooth.

Timeline

• Start date: 2018-01-08
• Primary completion: 2018-06-22
• Completion: 2018-08-03
• First posted: 2018-08-20
• Last updated: 2018-08-20

Locations

1 site across 1 country: Brazil