Influence of 670 nm low-level laser therapy on mast cells and vascular response of cutaneous injuries.

Laser biomodulation has been getting considerable attention when it comes to its effects on the inflammatory process. Its action upon mast cells have been already studied, but none of the previous papers related the resulting effect to the inflammatory and vascular status of the wounds. Therefore, the acute inflammatory process as well as the mast cells behavior and the vascular response were analyzed under the influence of laser treatment on cutaneous wounds. Surgical procedures were performed on 60 rats divided into sham and laser groups. Low-level laser therapy was performed following surgical procedures (670 nm, 9 mW, 4 J/cm(2), 124 s). Histological specimens were analyzed for cell morphology and immunohistochemistry using anti-von Willebrand Factor and anti-Vascular Endothelial Growth Factor antibody. Laser treatment resulted in an increased acute inflammatory response in irradiated tissues; surgical wounds treated with laser therapy had increased polymorphonuclear cells, mast cells and vasodilation and lower numbers of vessels than those in control rats. Laser treatment resulted in higher expression of VEGF in irradiated tissues 6-24h post-treatment (p=0.002). It is possible to observe an amplification of acute inflammatory process during the first hours after surgical procedure in rats submitted to laser therapy.

Esclerodermia sistêmica: relato de caso clínico / Systemic sclerosis: a case report

A esclerodermia sistêmica é uma doença dermatológica que pode afetar os tecidos orais e periorais. Suaetiologia é desconhecida sendo associada a um mecanismo autoimune. A doença acomete preferencialmentemulheres negras, entre 30 e 50 anos de idade, e se caracteriza por modificações da microcirculaçãocausando fibrose e obliteração das veias da pele, pulmão, trato gastrointestinal, rins e coração. O fenômenode Raynaud e edema das mãos e dedos são sinais característicos da doença. As manifestações orofaciais incluemaumento do espaço do ligamento periodontal, limitação da função mastigatória, dificuldade no processode reparo, fibrose da pele, redução da abertura bucal, entre outros. O objetivo deste trabalho é relataro caso clínico de uma paciente portadora de Esclerodermia Sistêmica, visando auxiliar o cirurgião-dentistaa identificar os sinais e sintomas característicos dessa alteração sistêmica que pode acometer os pacientes

The Systemic Scleroderma is a dermatologic illness that can affect oral and dermal tissue. Its etiology isunknown and it?s commonly associated to an autoimmune mechanism. The illness affects preferentiallyafrican-american women, between 30 and 50 years old and it is characterized by modifications of the microcirculationthat causes fibrosis and obliteration of the veins of the skin, lung, gastrointestinal system,kidneys and heart. Raynaud?s phenomenon and edema of the hands and fingers are characteristics signalsof the illness. The orofacial manifestations include increase of the space of the periodontal ligament, limitationof the chewing function, difficulty in the wound healing process, fibrosis of the face skin and reductionof the buccal opening, among others. The objective of this work is to describe a case of a pacient withSystemic Scleroderma looking foward to help the dentist identify the signs and symptoms of this illness.The dental treatment will then be modified to suit these patients