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Effects of low intensity laser irradiation phototherapy on dental pulp constructs

World Journal of Stomatology 2013年第1期2卷 12-17页

作者： Amr M Elnaghy Peter E Murray Paul Bradley Melissa Marchesan kenneth n namerow Amany E Badr Youssry M El-Hawary Farid A Badria Conservative Dentistry and Endodontics Department Faculty of Dentistry Mansoura University Mansoura 35516 Egypt Department of Endodontics College of Dental Medicine Nova Southeastern University Fort Lauderdale FL 33328-2018 United States Department of Orofacial Pain College of Dental Medicine Nova Southeastern University Fort Lauderdale FL 33328-2018 United States Department of Oral Biology Faculty of Dentistry Mansoura University Mansoura 35516 Egypt Department of Pharmacognosy Faculty of Pharmacy Mansoura University Mansoura 35516 Egypt

AIM: To investigate low intensity laser irradiation phototherapy(LILIP) on the proliferation, mineralization and degradation of dental pulp ***: Stem cells from human exfoliated deciduous teeth(SHED) were grown to confluence and seeded on collagen scaffolds to create dental pulp constructs. LILIP was delivered to the dental pulp constructs using an 830 nm GaA IAs laser at an output power of 20 m W. The LILIP energy density was 0.4, 0.8, 1.2, and 2.4 J/cm2. After 8 d, the cell proliferation and degradation within the dental pulp constructs were measured using histologic criteria. After 28 d, the effect of LILIP on SHED mineralization was assessed by von Kossa ***: SHED proliferation within the dental pulp constructs varied after exposure to the 0.4, 0.8, 1.2,and 2.4 J/cm2 LILIP energy densities(P n of SHED in nutrient deficient media was 218% after exposure to a 1.2 J/cm2 LILIP energy density. SHED grown in nutrient deficient media after exposure to a 0.4, 0.8, and 1.2 J/cm2 LILIP energy density, proliferated by 167-218% compared to the untreated(non-LILIP) control group(P nd 1.2 J/cm2 LILIP energy density, and grown in optimal nutritional conditions and proliferated by 147%-164% compared to the untreated(non-LILIP) control group(P nergy density(2.4 J/cm2) caused a reduction of the cell proliferation of up to 73% of the untreated(non-LILIP) control(P nt of mineral produced by SHED increased over time up to 28 d(P nd 1.2J/cm2 LILIP energy densities were the most effective at stimulating the increased the mineralization of the SHED from 150%-700% compared to untreated(nonLILIP) control over 28 d(P n of dental pulp constructs was affected by LILIP(P ntal pulp constructs grown in optimal nutritional conditions exposed to a 0.8 J/cm2 or 1.2 J/cm2 LILIP e

关键词： Dental pulp cells Proliferation Low intensity laser Low intensity laser irradiation phototherapy Stem cells from human exfoliated deciduous teeth

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