Biostimulatory Effects of Low-Intensity Pulsed Ultrasound on Rate of Orthodontic Tooth Movement and Associated Pain, Applied at 3-Week Intervals: A Split-Mouth Study.

Objective: Low-intensity pulsed ultrasound (LIPUS) is a noninvasive modality to stimulate bone remodeling (BR) and the healing of hard and soft tissues. This research evaluates the biostimulatory effect of LIPUS on the rate of orthodontic tooth movement (OTM) and associated pain, when applied at 3-week intervals. Methods: Twenty-two patients (11 males and 11 females; mean age 19.18 ± 2.00 years) having Angle's Class II division 1 malocclusion needing bilateral extractions of maxillary first bicuspids were recruited for this split-mouth randomized clinical trial. After the initial stage of alignment and leveling with contemporary edgewise MBT (McLaughlin-Bennett-Trevisi) prescription brackets (Ortho Organizers, Carlsbad, Calif) of 22 mil, followed by extractions of premolars bilaterally, 6 mm nickel-titanium spring was used to retract the canines separately by applying 150 g force on 0.019 × 0.025-in stainless steel working archwires. LIPUS (1.1 MHz frequency and 30 mW/cm2 intensity output) was applied for 20 minutes extraorally and reapplied after 3 weeks for 2 more successive visits over the root of maxillary canine on the experimental side whereas the other side was placebo. A numerical rating scale- (NRS-) based questionnaire was given to the patients on each visit to record their weekly pain experience. Impressions were also made at each visit before the application of LIPUS (T1, T2, and T3). Models were scanned with a CAD/CAM scanner (Planmeca, Helsinki, Finland). Mann-Whitney U test was applied for comparison of canine movement and pain intensity between both the groups. Results: No significant difference in the rate of canine movement was found among the experimental (0.90 mm ± 0.33 mm) and placebo groups (0.81 mm ± 0.32 mm). There was no difference in pain reduction between experimental and placebo groups (p > 0.05). Conclusion: Single-dose application of LIPUS at 3-week intervals is ineffective in stimulating the OTM and reducing associated treatment pain.

Awareness of obstructive sleep apnea and its effects on daily life among health professionals from Karachi, Pakistan.

BACKGROUND: Sleep disturbances are be poorly documented by primary care physicians. OBJECTIVE: Our objective for this survey was to assess the awareness level amongst medical and dental house officers, medical and dental practitioners, and ear, nose and throat specialists (ENTs) regarding OSA and its effects on daily life. METHODS: This was a questionnaire-based survey with yes and no and true and false type questions. In order to assess knowledge, questions related to the most common signs and symptoms of OSA were selected. Questionnaires were distributed in seven medical and dental colleges in Karachi, Pakistan under graduates and above. Stratified random sampling technique was used to assess specific professionals which made a total sample size of 614. The data of this descriptive study was compiled and analyzed using SPSS version 20. RESULTS: 84% of the participants stated their awareness about OSA. After analyzing a detailed response in the form of questionnaires, an average of only 15% showed adequate knowledge of the problem in question, the rest was unaware of the pathophysiology, signs, symptoms and management of a patient suffering from OSA. CONCLUSION: knowledge about pathophysiology of obstructive sleep apnea and its effect on daily routine work is insufficient among health professionals. It is essential to create awareness among medical and dental fraternity regarding OSA as it is often not diagnosed and treated.