Postoperative pain and quality of life assessment after endodontic preparation with rotary and reciprocating endodontic instruments: randomized clinical trial.

Background: Postoperative pain is a common complication following endodontic treatment, often caused by acute inflammatory responses in the periapical tissues. Several factors contribute to this, including inadequate instrumentation, apical extrusion of debris during canal preparation, and other aspects of the procedure. Advances in technology have led to the development of nickel-titanium (NiTi) instruments that have shown potential to reduce postoperative discomfort.

Effect of Combining Erythrosine with a High-Power Dental Curing Light Appliance on the Viability of a Planktonic Culture of .

The aim of this study was to evaluate the effectiveness of antimicrobial photodynamic therapy (aPDT) composed of the association of the photosensitizer (PS) erythrosine irradiated by a high-intensity dental light source against a culture of , comparing this effect with that of a 0.12% chlorhexidine solution. For this purpose, planktonic suspensions of were subjected to experimental conditions in which three different concentrations of erythrosine (E) (2, 4, and 8 μM) associated with three different doses emitted by the light source (L) (48, 96, and 144 J/cm) were crossed, corresponding to the exposure times of 40, 80, and 120 sec, respectively, delivered in pulsed mode.

Streptococcus mutans photoinactivation using a combination of a high potency photopolymerizer and rose bengal.

Background: Long treatment periods to reach a substantial inactivation of microorganisms are one of the critical challenges in the photodynamic therapy field.

Methods: Planktonic suspensions of Streptococcus mutans were treated in different groups: presence of rose bengal (RB at 2μM) and light exposure by a new high potency photopolymerizer (L at wavelength=440-480nm; dosimetry=96J/cm(2) - 40s of irradiation; potency density=1200mW/cm(2); dosage=48J) - RB+L+ (PDT), just with dye - RB+L-, just with light - RB-L+ and absence of light and dye RB-L- (control group). Aliquots of each group were transferred to Petri dishes to colony counting (CFU/mL) with the data transformed in log10.