Analgesic action of laser therapy (LLLT) in an animal model

Objectives: To evaluate the analgesic effect of laser therapy on healthy tissue of mice. Study design: Forty-five animals were divided in three groups of 15: A ? infrared laser irradiation (830 nm, Kondortech®, São Carlos, SP, Brazil); B ? red laser irradiation (660 nm, Kondortech®, São Carlos, SP, Brazil); C ? sham irradiation with laser unit off. After laser application, the mice remained immobilized for the injection of 30 µl of 2% formalin in the plantar pad of the irradiated hind paw. The time that the mouse kept the hind paw lifted was measured at 5 min intervals for 30 minutes. Results: Results showed statistically significant differences comparing the control group with the infrared laser group at 5, 20, 25 and 30 accumulated minutes, and with the red laser group at all time points. The analysis of partial times, at each 5 minutes, showed statistically significant differences between the control and the laser groups up to 20 minutes. Conclusions: Laser therapy had an analgesic effect and red laser had the best results

Utilização de ultra-som em cirurgia parendodôntica

Technological advances have increased the rate of success of dental procedures. In periradicular surgery, the use of ultrasonic tips ensures high-quality root-end cavity preparations, enables the performance of a 90-degree apicoectomy, and removes larger amounts of contaminated material. The authors reviewed in vitro and in vivo studies in the literature and evaluated root-end cavities prepared with burs or ultrasonic tips using scanning electron microscopy.O avanço tecnológico incrementou os índices de sucesso de procedimentos odontológicos. Em cirurgia parendodôntica, retropontas ultra-sônicas proporcionam uma retrocavidade de qualidade superior e permitem uma apicectomia em 90 graus, removendo maior quantidade de tecido contaminado. Os autores realizaram uma revisão de literatura da técnica in vitro e in vivo; procederam à análise de retrocavidades feitas com broca e retroponta ultra-sônica, com auxílio de macrofotografias digitais e Microscopia Eletrônica de Varredura