Saliva Analysis After Low-level Laser Therapy Application on the Masseter Muscle Located Above Parotid Salivary Gland

Study Overview
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Brief Summary
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The purpose of this study is to obtain experimental data on the possible changes that saliva may suffer when brought to low-level laser therapy protocols for analgesia in the masseter muscle, because this be on the Parotid salivary gland.

Detailed Description
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Climate: The study will be conduced by Lasertherapy and Photobiology Center (CELAFO) at the Institute of Research and Development at the University of Vale do Paraíba (UNIVAP), which was air-conditioned with temperature at 22 ° C. Volunteers: 30 male volunteers aged between 18 and 30 years. Flow Analysis Salivary pH and saliva buffer capacity before LLLT and after LLLT: Two consecutive samples of whole saliva were obtained from each second volunteer. The first, unstimulated total saliva (UTS) and the second of stimulated total saliva (STS). Obtaining mechanically given by chewing a paraffin 5cm² fragment. The gathering was held in the afternoon and with the patient in breakfast for at least one hour. All the volunteers were instructed not to brush teeth or use mouthwash for one hour prior to saliva collection of the experiment. The samples were collected UTS and STS requesting voluntary saliva deposited directly into a sterile universal collector. Salivary samples were compared by the universal table salivary flow described by Saliva samples were centrifuged at 1200 rpm for 10 minutes. All saliva volume produced during the 5-minute period was measured using test tubes recorded in milliliters. The pH was measured by a pH meter device. To test the buffer capacity, the saliva (3 mL) was placed in a Falcon tube containing 9 mL of 0,005 normal hydrochloric acid, subjected to manual shaking for 10 seconds, then maintained at rest for 10 minutes with open Falcon tube, aiming evaporation gases such as carbon dioxide which could interfere with the analysis. After 10 minutes the pH was measured with litmus tape aid compared with the color scale provided by the manufacturer. Low Level Laser Therapy (LLLT): The investigators used the LLLT after the first collection of saliva, control therapies were applied, placebo LLLT red and LLLT in the infrared.The treatment was applied with an interval of 7 days in a randomized, controlled, double-blind, by drawing lots. Irradiation of LLLT was conducted in eight (8) points on the skin in the masseter region. The distance between points was 1cm. To know exactly the location of points, transparency sheets were used (irradiation feedback) and reference points of each volunteer, as follows: point 1 commissure eyelid, point 2 in the tragus of the ear and point 3 on the labial commissure.The anticipated period of 15 minutes to occur the desired effects of LLLT was performed new material collection. Data Analysis: The salivary flow data, pH and buffering capacity of saliva was analyzed using a analysis program statistics with the nonparametric Kruskal-Wallis test. The significance level was 5% (p <0.05)

Official Title
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Biochemistry and Volumetric Analysis of Biofluid Salivary, Correlating the Flow, pH and Buffer Capacity With and Without Stimulation of the Masseter Muscle, Before and After Low-level Laser Irradiation

Conditions
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Saliva Altered

Intervention / Treatment
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* Radiation: Low level laser therapy
* Other: Placebo
* Other: Control


Participation Criteria
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Eligibility Criteria
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Inclusion criteria : Have all dental organs Male volunteers Age between 18 and 30 years Body mass index between 18.5 and 25 (normal) . Exclusion Criteria: Presence of problems that compromise the physiological activity of the masticatory system Neurological disorders Cerebral Palsy parafunctions : Sucking fingers Nail biting Nibble objects Bruxism Mouth breathing . Use of medication : Antihistamines Benzodiazepines Depressants of the central nervous system. Temporomandibular dysfunction: Clenching of the teeth Bruxism Use of partial or full dentures .

Ages Eligible for Study
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Minimum Age: 18 Years
Maximum Age: 30 Years

Sexes Eligible for Study
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Male

Accepts Healthy Volunteers
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Accepts Healthy Volunteers

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Treatment
Allocation: Randomized
Intervention Model: Crossover Assignment
Masking: Quadruple


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Active Comparator: Infrared Laser<br>Using a laser in the infrared wave spectrum (780 nm) | Radiation: Low level laser therapy<br>* Supported by the physical phenomenon of stimulated emission postulated by Albert Einstein in 1916 the laser (light amplification by Stimulated Emission of Radiation) is a device consisting of solid source materials, liquid or gas that produces beams of light when excited by a source of energy. This bright feature is a particular type of electromagnetic radiation, which differs from that emitted by conventional incandescent sources. These are the effects attributable to LLLT analgesic, anti-inflammatory and biostimulates and has been widely used due to low power densities and wavelengths with a penetration capacity in tissues without the generation of photothermal effects, which makes its feasible use multiple applications in Health area.<br>|
| Active Comparator: Red Laser<br>Using laser red wave spectrum (662 nm) | Radiation: Low level laser therapy<br>* Supported by the physical phenomenon of stimulated emission postulated by Albert Einstein in 1916 the laser (light amplification by Stimulated Emission of Radiation) is a device consisting of solid source materials, liquid or gas that produces beams of light when excited by a source of energy. This bright feature is a particular type of electromagnetic radiation, which differs from that emitted by conventional incandescent sources. These are the effects attributable to LLLT analgesic, anti-inflammatory and biostimulates and has been widely used due to low power densities and wavelengths with a penetration capacity in tissues without the generation of photothermal effects, which makes its feasible use multiple applications in Health area.<br>|
| Placebo Comparator: Placebo<br>Simulation of treatment with the device switched off | Other: Placebo<br>* Simulation of treatment with the device switched off<br>|
| Active Comparator: Control<br>A scientific control group allows the experimental study of a variable at a time, and is a vital part of the scientific method. In a controlled experiment, two identical experiments are conducted. In one, the treatment - tested factor - is applied. In another - control - the tested factor is not applied For example, when testing a drug, it is important to carefully check the suspected drug effects are produced by the drug. Doctors can it with a double-blind study in a clinical trial: two ( statistically ) identical groups of patients are compared, one gets the drug and the other receives a placebo. Neither subjects nor investigators know which group receives the actual drug , which serves to prevent bias and isolating effects of such drugs. | Other: Control<br>* A scientific control group allows the experimental study of a variable at a time, and is a vital part of the scientific method. In a controlled experiment, two identical experiments are conducted. In one, the treatment - tested factor - is applied. In another - control - the tested factor is not applied. For example, when testing a drug, it is important to carefully check the suspected drug effects are produced by the drug. Doctors can it with a double-blind study in a clinical trial: two (statistically) identical groups of patients are compared, one gets the drug and the other receives a placebo. Neither subjects nor investigators know which group receives the actual drug, which serves to prevent bias and isolating effects of such drugs.<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Increased salivary flow | Expect positive results of this research on the increased salivary flow , improved saliva buffer capacity as well as increased salivary pH enabling a better quality of life for patients. | 24 months | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Improvement of the salivary pH | Expect positive results of this research on the increased salivary flow , improved saliva buffer capacity as well as increased salivary pH enabling a better quality of life for patients. | 24 months | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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Saliva, Low-level laser therapy, Masseter muscle, Salivary glands