The Strontium Chloride Associated With Photobiomodulation in the Control of Post-bleaching Sensitivity
Condition: Dentin Sensitivity
MeSH terms: Dentin Sensitivity; Hypersensitivity
Study type: Interventional

Summary: 
      This study investigated the effects of the association of strontium chloride with
      photobiomodulation on the dental bleaching process, testing the hypothesis that they may
      control dental sensitivity post-bleaching teeth.
    

Detailed description: 
      The objective of this double-blind, randomized, controlled clinical study was to evaluate the
      effect of 10% strontium chloride associated with photobiomodulation (FBM) on teeth exposed to
      35% hydrogen peroxide during 3 weeks of whitening treatment. Methods: 50 volunteers were
      evaluated by the split mouth model, where the hemiarchy patients were randomized and
      subsequently allocated to one of the experimental groups: PLACEBO (negative control) - group
      with no desensitizing treatment, only bleached; FBM (positive control) - group treated with
      placebo gel and application of the LLLT (Low Level Laser Therapy); ESTRÔNCIO (positive
      control) - group treated with 10% strontium chloride and simulation of LLLT application
      (without light emission); and FBM + ESTRÔNCIO - group treated with LLLT + 10% strontium
      chloride.
    

Intervention name(s): PLACEBO (Negative Control); FBM; ESTRÔNCIO; FBM+ESTRÔNCIO
Intervention type(s): Other; Other; Other; Other
Intervention description(s): The group received in-office bleaching. A 45-minute application of 35% hydrogen peroxide gel (Whiteness HP, FGM, Joinville, SC) was carried. After whitening therapy, a water-soluble placebo gel (KY®, Johnson & Johnson, SP, Brazil) was applied to the buccal surfaces of incisors, canines and premolars with the help 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 handpiece at low speed (Dabi Atlante, Ribeirão Preto, SO, Brazil) was used to rub the placebo gel for 20 seconds in each tooth surface. After washing the placebo gel, the laser tip was positioned at two points, apical and cervical, without emitting light (placebo), simulating the application of low-level laser therapy (LLLT).
This protocol was performed in 3 sessions, with an interval of seven days between them.; This group received photobimodulation with low level laser therapy (LLLT) of infrared spectrum with a wavelength of 808 nm in its active environment AsGaAl (Photon Lase III, DMC Equipamentos Ltda; São Carlos, SP, Brazil), at two points: cervical and apical region of the incisors, canines and premolars. 60 J / cm² was applied at each point for 16 seconds. The laser was applied in 3 sessions with a time interval of seven days between them.; After whitening therapy, a toothpaste with 10% strontium chloride (Sensodyne Original, GSK, London, United Kingdom) was applied to the buccal surfaces of incisors, canines and premolars with the help 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 handpiece at low speed (Dabi Atlante, Ribeirão Preto, SO, Brazil) was used to rub the desensitizer for 20 seconds on each tooth , according to the manufacturer's specifications. The desensitizer therapy was realized in 3 sessions with a time interval of seven days between them.; After whitening therapy, a 10% strontium chloride toothpaste (Sensodyne Original, GSK, London, United Kingdom) was applied to the buccal surfaces of whitened teeth with the help of a Microbrush applicator applicator (Microbrush, 3M ESPE, São Paulo , Brazil) for 10 minutes. Then, a rubber cup (Unid Microdont, São Paulo, SP, Brazil) mounted on a handpiece at low speed (Dabi Atlante, Ribeirão Preto, SO, Brazil) was used to rub the desensitizer for 20 seconds on each tooth , according to the manufacturer's specifications. After washing the desensitizer, the photobimodulation was realized with Low Level Laser Therapy (LLLT) of infrared spectrum with wavelength of 808 nm in its active environment AsGaAl (Photon Lase III, DMC Equipamentos Ltda; São Carlos, SP, Brazil), in two points: cervical and apical region of the incisors, canines and premolars. 60 J / cm² was applied at each point for 16 seconds. This protocol was performed in 3 sessions, with an interval of seven days between them.
Allocation: Randomized
Intervention model: Crossover Assignment
Masking: Double (Participant, Outcomes Assessor)
Primary purpose: Treatment