To evaluate intrapulpal and tooth surface temperature increases (ΔT) produced by different violet LED devices (405 nm) under continuous and pulsed irradiation protocols in an in vitro model. Three human mandibular incisors were prepared and instrumented. A 35
This study aims to evaluate the effect of different surface treatments on composite resin surface hardness, roughness and shear bond strength. Sixty-nine nano-composite disc specimens with a diameter of 7 mm and a height of 4 mm were assigned to 3 groups (n = 23) according to the surface treatment; Group 1: control, Group 2: surface treated by Er: YAG laser and Group 3: surface treated by air abrasion. Assessment of Surface hardness and roughness were performed, and then all the specimens treated surfaces were acid-etched followed by universal adhesive bond application. After bonding of repair composite to treated composite samples, shear bond strength was measured. Data analysis using Shapiro Wilk Normality test, Kolmogorov tests, one-way ANOVA and Tukey’s Post Hoc were performed. No statistically significant difference in hardness and roughness mean values were between the three tested groups, while laser group exhibited significantly higher shear bond strength and higher maximum load compared with other tested groups. Composite resin surface with laser treatment showed high bond strength of repaired composite without significant effect on surface hardness and roughness of composite.
The aim of this study was to investigate the different dentin surfaces produced following their modification using Er, Cr: YSGG and Er: YAG lasers under different operating parameters. Thirty-three sound, caries-free human third molars were collected and sectioned to expose flat dentin surfaces. Each specimen was polished and a 2 × 2 mm area was delineated for laser irradiation. The samples were divided into eleven groups according to laser type, irradiation time, tip diameter, and mode of application. Er: YAG laser irradiation was performed in non-contact mode for 30 s, 1 min, and 2 min, while Er, Cr: YSGG laser irradiation was applied in contact mode using different tips and exposure times. Control groups included untreated dentin and dentin etched with 37
Reactive lesions of the oral mucosa, including pyogenic granuloma, inflammatory fibrous hyperplasia, and traumatic fibroma, commonly develop in response to chronic irritation. Conventional surgical excision may be associated with intraoperative bleeding and postoperative discomfort. Laser therapy offers a minimally invasive alternative with improved clinical outcomes. To evaluate the clinical effectiveness of diode laser therapy in the management of few reactive lesions of the oral mucosa. This case series included four patients diagnosed clinically and histopathologically with reactive oral lesions. The lesions were excised using a 980-nm diode laser operated in continuous mode at 1.0 W in contact mode under local anaesthesia. Intraoperative and postoperative outcomes were assessed during follow-up. Laser excision disclosed minimal intraoperative bleeding, good patient compliance, and uneventful healing. Histopathological examination confirmed the clinical diagnosis in all cases. No postoperative complications or recurrence were observed during the follow-up period. Diode laser therapy is an effective and minimally invasive treatment modality for reactive lesions of the oral mucosa, offering excellent haemostasis, patient comfort, and favourable healing outcomes.
This study investigated the antimicrobial efficacy of biosurfactant alone and in combination with Er: YAG laser radiation against Enterococcus faecalis and compared it to that of conventional irrigation sodium hypochlorite. Sixty-five extracted maxillary central incisors were collected and decoronated. Root canals were then instrumented mechanically using rotary files and inoculated with E. faecalis, then divided into 5 groups (#13 each group) according to irrigation protocol: Group 1: irrigated by distilled water, Group 2: irrigated with 2.5
