Abstract
BackgroundDentin hypersensitivity (DH) in one of the most common causes of patient discomfort in the general population and its prevalence is higher in patients who have received basic or surgical periodontal treatment. Efficiency of the diode laser with different wavelengths has been studied by several authors, showing an improvement rate of the DH between 60-98%. The aim of the present study was to evaluate the effect of photobiomodulation (PBM) treatment on the reduction of DH after non surgical periodontal treatment.Material and MethodsA randomized split mouth clinical trial was performed involving 30 patients (120 teeth) diagnosed with DH after scaling and root planning. Two teeth of the experimental side were treated with the laser and 2 teeth of the control side were treated without activating the laser. The laser treatment parameters for each tooth were 660nm, 200mW, CW, illuminated area 1.15cm2, 173mW/cm2, 60 seconds, 12 J, 10.4J/cm2. Age, gender, smoking, plaque index, gingival recession, probing and VAS (for tactile and thermal stimulation) were registered before the laser treatment, immediate post treatment (after 2 minutes), 2 weeks, 1 month and 2 months after treatment.ResultsThere was significant difference (p<0.01) in discomfort to thermal and mechanical stimulation between the control and diode laser treatment sites at all evaluation periods. The level of discomfort decreased immediately following diode laser therapy, and continued to demonstrate a decrease for the duration of the study. All teeth remained vital after laser treatment, without adverse reactions or complications.ConclusionsThe PBM can be used to reduce DH without detrimental pulpal effects. Key words:Dental hypersensitivity, laser, diode laser, photobiomodulation.
Highlights
Dentin hypersensitivity (DH) is defined as a short, intense pain that originates in the exposed dentin in response to a chemical, thermal, evaporative, tactile or osmotic stimulus and cannot be attributed to other dental defect or pathology [1]
All teeth remained vital after laser treatment, without adverse reactions or complications
Periodontal therapy is an important etiologic factor in the cause of DH, scaling and root planning exposed root surfaces triggers no hypersensitivity in some patients [6]
Summary
Patient age ranged from 19 to 67, with a mean age of 41.8 years (9 males and 21 females). The main of cigarettes/day was 3.26 (range 0-20 cigarettes), 22 patients were smokers (73.3%) and 8 non smokers (26.7%). A more detailed tables show a distribution of estimated marginal means of VAS for thermal (Table 2) and tactile stimulation (Table 3) for each patient. The level of discomfort elicited by thermal and mechanical stimulation decreased significantly (p < 0.01) immediately following diode laser therapy, and continued to demonstrate a decrease for the duration of the study. There was significant difference (p < 0.01) in discomfort to thermal and mechanical stimulation between the control and diode laser treatment sites at all evaluation periods There were no adverse effects of diode laser treatment and no complications
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