Effect of diode low-level lasers on fibroblasts derived from human periodontal tissue: a systematic review of in vitro studies
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This study aimed to systematically assess the parameter-specific effects of the diode low-level laser on human gingival fibroblasts (HGFs) and human periodontal ligament fibroblasts (HPDLFs). An extensive search was performed in major electronic databases including PubMed (1997), EMBASE (1947) and Web of Science (1956) and supplemented by hand search of reference lists and relevant laser journals for cell culture studies investigating the effect of diode low-level lasers on HGFs and HPDLFs published from January 1995 to December 2015. A total of 21 studies were included after screening 324 independent records, amongst which eight targeted HPDLFs and 13 focussed on HGFs. The diode low-level laser showed positive effects on promoting fibroblast proliferation and osteogenic differentiation and modulating cellular inflammation via changes in gene expression and the release of growth factors, bone-remodelling markers or inflammatory mediators in a parameter-dependent manner. Repeated irradiations with wavelengths in the red and near-infrared range and at an energy density below 16 J/cm2 elicited favourable responses. However, considerable variations and weaknesses in the study designs and laser protocols limited the interstudy comparison and clinical transition. Current evidence showed that diode low-level lasers with adequate parameters stimulated the proliferation and modulated the inflammation of fibroblasts derived from human periodontal tissue. However, further in vitro studies with better designs and more appropriate study models and laser parameters are anticipated to provide sound evidence for clinical studies and practice.
KeywordsLow-level laser Diode laser Human gingival fibroblasts Human periodontal ligament fibroblasts Systematic review
This research was supported by Health and Medical Research Fund of Hong Kong (01121056).
Compliance with ethical standards
Conflict of interest
The authors declare that they have no conflict of interest.
- 5.Tuner J, Hode L (2007) The laser therapy handbook: a guide for research scientists, doctors, dentists, veterinarians and other interested parties within the medical field. Prima Books, GrangesbergGoogle Scholar
- 19.Wu JY, Chen CH, Yeh LY, Yeh ML, Ting CC, Wang YH (2013) Low-power laser irradiation promotes the proliferation and osteogenic differentiation of human periodontal ligament cells via cyclic adenosine monophosphate. Int J Oral Sci 5:85–91. doi: 10.1038/ijos.2013.38 CrossRefPubMedPubMedCentralGoogle Scholar
- 32.Saygun I, Karacay S, Serdar M, Ural AU, Sencimen M, Kurtis B (2008) Effects of laser irradiation on the release of basic fibroblast growth factor (bFGF), insulin like growth factor-1 (IGF-1), and receptor of IGF-1 (IGFBP3) from gingival fibroblasts. Lasers Med Sci 23:211–215CrossRefPubMedGoogle Scholar
- 38.Brade H (1999) Endotoxin in health and disease. Marcel Dekker, New YorkGoogle Scholar
- 51.Wu JY, Chen CH, Wang CZ, Ho ML, Yeh ML, Wang YH (2013) Low-power laser irradiation suppresses inflammatory response of human adipose-derived stem cells by modulating intracellular cyclic AMP level and NF-kB activity. PLoS One 8, e54067. doi: 10.1371/journal.pone.0054067 CrossRefPubMedPubMedCentralGoogle Scholar