Your browser doesn't support javascript.
loading
Microhardness of Nd: YAG laser irradiated enamel surfaces
Kuramoto Junior, Massuji; Matson, Edmir; Turbino, Míriam L; Marques, Rogério A.
  • Kuramoto Junior, Massuji; USP. BR
  • Matson, Edmir; USP. BR
  • Turbino, Míriam L; USP. BR
  • Marques, Rogério A; USP. BR
Braz. dent. j ; 12(1): 31-33, jan.-jun. 2001. tab
Article in English | LILACS, BBO | ID: lil-554374
ABSTRACT
Several studies have been conducted in order to verify effects of laser irradiation on dental structures. However, different settings and methods employed have led to inconclusive results. The aim of this study was to evaluate the effects of several settings of NdYAG laser irradiation on enamel microhardness. Fifteen groups of 10 human third molars each were submitted to Vickers microhardness indentations prior to and after laser irradiation. The data were submitted to the t-test for dependent samples (P<0.05) for statistical evaluation. Lower total delivered energy (under 30 J) resulted in no statistically significant difference of microhardness between irradiated and non-irradiated samples, whereas higher energy settings decreased enamel surface microhardness significantly. This can be due to the significant temperature rise during irradiation. Thus, we conclude that laser irradiation, under the conditions of this study, is not suitable for improving enamel properties, because of decreased microhardness of irradiated samples.
Subject(s)
Full text: Available Index: LILACS (Americas) Main subject: In Vitro Techniques / Dental Enamel / Hardness / Lasers Language: English Journal: Braz. dent. j Journal subject: Dentistry Year: 2001 Type: Article Affiliation country: Brazil Institution/Affiliation country: USP/BR

Similar

MEDLINE

...
LILACS

LIS

Full text: Available Index: LILACS (Americas) Main subject: In Vitro Techniques / Dental Enamel / Hardness / Lasers Language: English Journal: Braz. dent. j Journal subject: Dentistry Year: 2001 Type: Article Affiliation country: Brazil Institution/Affiliation country: USP/BR