The intervention will be twelve sessions (two per week). Laser parameters: wavelength - 786.94 nm; conventional tip; energy density - 25 J/cm²; intensity - 1.675 mW/cm²; output power - 70 mW (0.070 W); and exposure time - 20 seconds per point. The point application method will be used with direct contact with the skin (spot beam of 0.04 cm²), following the protocol suggested by Carvalho et al.50 and Venezian et al.44 A potentiometer will be used to determine the mean power of the laser equipment to ensure the safety of the operator.

The intervention will be a maxillary occlusal splint will be used on the maxilla with palatal and occlusal coverage. Following the protocol established by Hachmann et al., the children will only use the splint at night for two months, with weekly adjustments of a quarter turn.46

Placebo laser will be performed using the same equipment.

Sleep Bruxism

Low-level laser therapy administrated to acupoints

Laser

Occlusal splint

Placebo laser (Low-level laser therapy administrated to acupoints)

Placebo laser

Evaluation of Muscle Activity, Bite Force and Salivary Cortisol in Children With Bruxism

Evaluation of Muscle Activity, Bite Force and Salivary Cortisol in Children With Bruxism Before and After Laser Use of Low Power in Acupoints- Controlled Clinical Trial

six-channel BTS TMJOINT electromyograph (BTS Engineering)

Bite force will be measured using a digital gnathodynamometer (DMD, Kratos Equipamentos Industriais Ltda, Cotia, São Paulo, Brazil) adapted for oral conditions

Saliva will be collected on cotton swabs, which will be left in the mouth for two minutes. The cotton will then be placed into a centrifuge tube and the sample will be stored at -20° C until analysis.25 Salivary cortisol will be measured prior to therapy and on Day 50 to measure the degree of stress. Two collections will be performed in the home of the participant at 9 am and prior to going to sleep with at least one hour of fasting prior to the collection and will be followed with oral hygiene with water. The collection will be performed on a Sunday following the manufacturer's recommendations and will be delivered on the following Monday for analysis at University Nove de Julho (Brazil).

Monica Canuto Salgueiro

University of Nove de Julho

A canine guidance is reestablished by additive composite resin restorations of the canine cusp.

Bruxism

Myopathy

Muscular Activity

Masticatory muscular activity is measured before and after treatment with additive composite resin fillings (Tetric EvoCeram, Ivoclar Vivadent, Schaan, Liechtenstein). A Grindcare (Medotech A/S, Herlev, Denmark) device is used for determination of muscular activity.
A first measurement is conducted, followed by 4 weeks without any intervention. A second measurement is then carried out before restoration of the canine cusps with composite fillings. A third measurement is conducted, again followed by 4 weeks without any intervention. At last a final measurement is conducted.

Composite resin restoration

Reduction of Masticatory Muscle Activity by Restoring Canine Guidance

Reduction of Masticatory Muscle Activity by Restoring Canine Guidance With Composite Resin Fillings in Patients With Bruxism.

Masticatory muscular activity is measured before and after treatment with additive composite resin fillings (Tetric EvoCeram, Ivoclar Vivadent, Schaan, Liechtenstein). A Grindcare (Medotech A/S, Herlev, Denmark) device is used for determination of muscular activity.

resin/hovedpine

Evaluation of Muscle Activity, Bite Force and Salivary Cortisol in Children With Bruxism

Reduction of Masticatory Muscle Activity by Restoring Canine Guidance

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