Background Chronic sinusitis is one of the most common chronic diseases involving different age groups. Because the nature and etiology of chronic sinusitis are not completely known, there is not any standard treatment for this disease. It has been suggested that low-level laser can be used in treating chronic sinusitis but there are limited studies about its usage. In this research, intra-oral radiation of low-level laser has been described and implemented for the first time. Suggested hypotheses about the efficacy of this type of radiation (intra-oral) in treating chronic maxillary sinusitis includes this fact that the depth of maxilla’s vestibule is also the floor of maxillary sinus and sinus discharges collect in this area because of gravity effect. Therefore, with considering suitable radiation angle, this area gets the most benefits of laser’s anti-inflammatory effects. Material and Methods In this study, 20 patients with chronic maxillary sinusitis were included. They were assessed before and after treatment. Treatment plan was performed in 8 sessions every other days using low-level diode laser with 810 nm. Snot-22 questionnaire and rhinomanometry were used for evaluating patients. Changes of signs and symptoms were recorded in questionnaire every session and 6 months after treatment. Friedman and Wilcoxon tests were used for data analyses. In this study, P value < 0.05 was considered statistically significant. Results All variables and all symptoms of patients were improved using intra-oral low-level laser and this improvement was statistically significant (P value<0.05). There was also significant decrease in nasal airway resistance and significant increase in air flow (P value<0.05). Six month after treatment completion, there was no significant difference between the results of completion and the results of 8th treatment session (P value< 0.05). Conclusions Using intra-oral low-level laser is a suitable way to treat patients with chronic maxillary sinusitis. Key words:Chronic sinusitis, maxillary sinusitis, low-level laser.
Chronic sinusitis is one of the most common chronic diseases. In this research, intra-oral radiation of low-level laser has been compared with extra-oral low level laser radiation in treating maxillary chronic sinusitis for the first time. In this clinical trial, 40 patients were enrolled. Treatment plan was performed in 8 sessions, every other day, and using low-level diode laser with 810 nm. SNOT-22 questionnaire and rhinomanometry were used for evaluating patients. Mann whiteny, Fridman and wilcoxson tests were used for data analyses. P. value < 0.05 was considered statistically significant. All studied variables were improved using intra and extra oral low-level laser and this improvement was statistically significant (P. value<0.05). Comparing the two groups, Intra-oral laser therapy significantly (P. value<0.05) improved rhinomanometry variables compared to extra-oral laser therapy. The two groups showed no significant difference in improvement of clinical symptoms that contained in the SNOT-22 questionnaire except for sneeze which intra-oral laser therapy significantly decreased this variable (P. value<0.05). It should be noted that intra-oral radiation reduced all symptoms earlier than extra-oral radiation. After Sixmonths, in intra-oral group there was no significant difference between the results of completion and the results of 8th treatment session (P. value> 0.05). But in extra-oral group only post nasal discharge and thick nasal discharge were significantly increased compared with the results of the 8th session of radiation. Other symptoms showed no significant difference (P. value>0.05). Using intra and extra oral low-level laser therapy is a suitable way to treat patients with chronic maxillary sinusitis.
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