Effect of low-level laser therapy (λ660 nm) on angiogenesis in wound healing: a immunohistochemical study in a rodent model.

The aim of the present investigation was to evaluate the angiogenesis on dorsal cutaneous wounds in a rodent model treated with λ660 nm laser light. New vessel formation is a multistep process involving vessel sprouting, endothelial cell migration, proliferation and tube formation. Although several in vivo studies have shown that laser phototherapy influences tissue repair, a fully understanding of angiogenesis mechanisms are not yet known.

Effect of LED phototherapy (λ700 ± 20 nm) on TGF-β expression during wound healing: an immunohistochemical study in a rodent model.

Objective: The aim of the present investigation was to evaluate transforming growth factor β (TGF-β) expression on cutaneous wounds in rodents treated or not treated with LED light.

Background: TGF-β is a multifunctional cytokine that presents a central action during tissue repair. Although several studies both in vitro and in vivo have shown that LED phototherapy influences tissue repair, a full understanding of the mechanisms involved in its usage, such as in the modulation of some growth factors, remains unclear.

Influence of laser (λ670 nm) and dexamethasone on the chronology of cutaneous repair.

Objective: This study aimed to assess the effect of LLLT associated with and without dexamethasone on inflammation and wound healing in cutaneous surgical wounds.

Background: Limited studies are directed at the possible interference of laser photobiomodulation on the formation of myofibroblasts, associated with an antiinflammatory drug.

Methods And Materials: Standard skin wounds were performed on 80 Wistar rats, distributed into four groups: no treatment (sham group), laser only (λ670 nm, 9 mW, 0.

A feasible procedure in dental practice: the treatment of oral dysplastic hyperkeratotic lesions of the oral cavity with the CO2 laser.

Objectives: The aim of this work is to report some cases of surgical removal of hyperkeratotic lesions of the oral cavity with the CO(2) laser.

Background: Hyperkeratosis is an abnormal thickening of the stratum corneum caused by increased deposition of keratin, and its histopathologic features show wide variations. These changes are significant because they determine different biologic behavior.

Effect of 670-nm laser therapy and dexamethasone on tissue repair: a histological and ultrastructural study.

Objective: In this study we investigated the role of extracellular matrix elements and cells during the wound healing phases following the use of low-level laser therapy (LLLT) and anti-inflammatory drugs.

Background Data: There are few scientific studies that characterize the possible interactions of LLLT and anti-inflammatory medications.

Materials And Methods: Thirty-two rats submitted to a wound inflicted with a 6-mm-diameter punch.

Effects of freezing on bone histological morphology.

Allograft bone has been widely used for reconstruction of different portions of the skeleton. The fragment of bone harvested must be kept under low temperatures. The cryopreservation also contributes to decrease the antigenic potential of the tissue.