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Titolo:
TRANSFORMATION OF HYDROXYAPATITE TO FLUORAPATITE BY IRRADIATION WITH HIGH-ENERGY CO2-LASER
Autore:
MEURMAN JH; HEMMERLE J; VOEGEL JC; RAUHAMAAMAKINEN R; LUOMANEN M;
Indirizzi:
UNIV HELSINKI,INST DENT,POB 41 FIN-00014 HELSINKI FINLAND UNIV HELSINKI,DEPT ANAT FIN-00014 HELSINKI FINLAND UNIV LOUIS PASTEUR STRASBOURG 1,CTR RECH ODONTOL,INSERM U424 STRASBOURG FRANCE
Titolo Testata:
Caries research
fascicolo: 5, volume: 31, anno: 1997,
pagine: 397 - 400
SICI:
0008-6568(1997)31:5<397:TOHTFB>2.0.ZU;2-#
Fonte:
ISI
Lingua:
ENG
Soggetto:
HUMAN DENTAL ENAMEL; IONIC ADSORPTION; ND-YAG; DISSOLUTION; KINETICS; POWDER; EQUILIBRIUM; SOLUBILITY;
Keywords:
LASER; HYDROXYAPATITE; FLUORAPATITE;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
23
Recensione:
Indirizzi per estratti:
Citazione:
J.H. Meurman et al., "TRANSFORMATION OF HYDROXYAPATITE TO FLUORAPATITE BY IRRADIATION WITH HIGH-ENERGY CO2-LASER", Caries research, 31(5), 1997, pp. 397-400

Abstract

High-energy laser irradiation has been shown to cause crystalline transformations in apatites, which may lead to the formation of tricalcium phosphates with a resulting decrease in acid resistance. Depending on the nature and energy density of laser irradiation used, however, anincrease of acid resistance of dental enamel has also been reported after laser irradiation. The aim of the present study was to investigate the phase transformation of hydroxyapatite (HA) to fluorapatite (FA)in a model system that incorporates sodium fluoride (NaF) into apatite structure by using laser irradiation. A CO2 laser was used at energydensities ranging from 21 to 500 J/cm(2). Synthetic HA mixed with NaF(10:1) was the target of laser irradiation. The crystalline structures were then investigated using X-ray diffraction analysis. The resultsshowed that a phase transformation of HA to FA could be realized, andthat the threshold energy density needed was 38 J/cm(2). Not only is the finding crystallographically important, but it also opens new perspectives for future research regarding the development of laser technology for clinical purposes.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 12/07/20 alle ore 06:30:50