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one the parameters facilitating the decision.Purpose To evaluate the safety and efficacy of the ToothWave radiofrequency (RF) toothbrush in the reduction of plaque, calculus and gingival inflammation, as compared to a standard powered toothbrush accepted by the American Dental Association (ADA). Methods This was a single-blind, double arm, prospective study. Subjects were randomized to one of two treatment groups, receiving either the RF powered toothbrush or a control powered toothbrush, and performing twice daily brushing for a test period of 6 weeks. Plaque (RMNPI), calculus (V-MI), gingival inflammation (MGI) and bleeding (GBI) were assessed at baseline, after 4 and 6 weeks. Comparisons were completed both within and between each treatment group. Statistical analyses were conducted using the Mann Whitney non-parametric model. Results 85 subjects completed the study and had fully evaluable data. No significant differences between the groups were found in the baseline scores (P≥ 0.165). Following 6 weeks, the RF test group demonstrated statistically significant reductions in plaque, gingivitis and calculus compared to the control powered toothbrush (P≤ 0.001). selleck chemicals Both toothbrushes were well-tolerated and no device-related adverse events were reported. The RF-utilizing powered toothbrush produced statistically significant reductions in dental plaque, calculus deposition, gingival inflammation and gingival bleeding as compared to a control powered toothbrush. Clinical significance The RF powered toothbrush used twice daily resulted in an overall improvement in oral health.Purpose To compare the dentin bonded external marginal integrity and the internal surface indentation hardness of bulk-fill and conventional resin-based composite (RBC) placed in both bulk and increments. Methods 120 MO and DO cavities were prepared in 60 extracted human third molars. The teeth were randomly divided into four groups of 15 teeth per group to be restored as follows BB (bulk-fill RBC, placed in a 4 mm bulk increment), BL (bulk-fill RBC, placed in 2 mm incremental layers), CB (conventional RBC, placed in a 4 mm bulk increment), and CL (conventional RBC, placed in 2 mm incremental layers). Marginal gaps were measured at mesial and distal dentin gingival cavosurfaces of each tooth using scanning electron microscopy of epoxy resin replicas and Knoop hardness (KHN) was measured at three different RBC depths (1.8, 2.8 and 3.8 mm). Statistical analyses included one-way ANOVA with post-hoc Tukey's HSD, and paired-sample t-test or a nonparametric Wilcoxon signed-rank test, as appropriate. Results There was no significant effect of RBC restoration type on external marginal gap at the distal surface or at the mesial surface among the four groups tested (P> 0.05 in each instance), while no significant difference in external marginal gap was found between the mesial and distal surfaces within groups (P> 0.05 in each instance). The mean RBC internal surface KHN at 1.8 mm depth was significantly greater than at 2.8 mm and 3.8 mm depths in all tested groups (P less then 0.05 for all instances), with a similar mean internal hardness between all groups. The bulk-fill RBC restorations demonstrated similar marginal gap formation and Knoop hardness to conventional universal RBC restorations under the conditions of this study. Clinical significance Bulk-fill resin-based composite (RBC), from the perspective of marginal adaptation and internal hardness, may be a suitable alternative to conventional RBC.Purpose To evaluate the effect of nanohydroxyapatite ( nHAP) associated with photobiomodulation (PBM) in the control of dentin hypersensitivity (DH). (C-Shape It). Methods 32 subjects with 83 hypersensitive teeth were randomized into four groups (N =8) GPlacebo - simulated PBM (without light emission) followed by the application of nHAP-free toothpaste; GLaser - PBM followed by the application of nHAP-free toothpaste; GnHAP - simulated PBM followed by the application of nHAP; GLasernHAP - PBM followed by the application of nHAP. A visual analogue scale (VAS) was used to measure DH after a tactile and evaporative stimulus. DH evaluations were performed at four times baseline, 1st, and 2nd treatment sessions, and 1 month. A questionnaire was used to evaluate the risk factors associated with DH intensity. Mixed-design ANOVA followed by Tukey test and logistic regression were used. Results The mechanical stimulus showed a significant reduction in DH in all experimental groups (P less then 0.05) at the 2nd treatment session. For the evaporative stimulus, the GLasernHAP group presented a significant reduction in DH at the 1st treatment session (P less then 0.05). Intragroup analysis showed that only the GnHAP group showed regression of DH at 1 month for the two applied stimuli. The variables of parafunctional habits, diets rich in acidic drinks and anxiety had significant relationships with the intensity of DH (P less then 0.05). Clinical significance The use of nHAP and application of PBM to laser are effective in the control of dentin hypersensitivity. However, their association did not enhance the desensitizing effect.Purpose To review the literature on the presence of two clinical manifestations in patients presenting COVID-19 (SARS-CoV-2) infection loss of taste (ageusia) and loss of smell (anosmia). Methods PubMed and EMBASE were searched and studies were selected starting from November, 2019 until April 2020; also, the references of the selected articles were evaluated for methodological quality. Results Of the 19 studies analyzed, five were included to evaluate the presence of ageusia and/or anosmia as symptoms in patients who were tested and resulted positive for the SARS-CoV-2 virus. In a total of 10,818 patients, 8,823 presented ageusia (81.6%; range 5.6%-88%) and 8,088 presented anosmia (74.8%; range 5.1-85.6%). Only one study recorded both symptoms with a percentage of 18.6%. Clinical significance This systematic review demonstrated significant presence of ageusia and anosmia in the patients with COVID-19 infection. These symptoms may be considered as the first manifestation of the infection.
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