Effects of laser biostimulation on the epithelial tissue for keratinized layer differentiation: an in vitro study

G Caccianiga, A Cambini, E Donzelli, M Baldoni, G Rey, A Paiusco

Article ID: 6644
Vol 30, Issue 2S1, 2016
DOI: https://doi.org/10.54517/jbrha6644
Received: 9 July 2016; Accepted: 9 July 2016; Available online: 9 July 2016; Issue release: 9 July 2016

Abstract

Gingival augmentation techniques proposed in the international literature do not exclude a surgical component, which determines consequent post-surgical discomfort and results are not always predictable. In recent years, the introduction of laser biostimulation has led to a less invasive approach, particularly in the treatment of periodontally compromised patients, limiting the surgical phase to seriously compromised cases, with regeneration techniques for the restoration of a correct periodontal tissue anatomy. The aim of this in vitro study is to establish the validity of laser biostimulation in order to develop the epithelial keratinized layer of the tissue by stimulating fibroblasts-keratinocytes organotypic cultures and fibroblasts and keratinocytes mono-cultures. We created two groups (test and control), each one composed of 3 fibroblast cultures, 3 keratinocyte cultures and 3 organotypic cultures. We performed laser irradiation of test group with Wiser Doctor Smile Lambda, Flat Top Handpiece, at 50 J/cm2 of fluency with one application every 40 h for a total of 5 applications. Forty-eight h after the last laser application, we investigated the presence and amount of keratins 5 and 8 with citofluorymetric and western blotting analyses. Analyses showed an increase in keratin synthesis in test group cultures, showing a remarkable increase in production of keratin 8 in co-cultures test. Laser biostimulation can considerably enhance keratin synthesis when applied with high energy doses and repeated applications to keratinocytes-fibroblasts co-cultures.


Keywords

biostimulation;keratinization;low level laser irradiation;keratinocytes;fibroblasts


References

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