INVESTIGADORES
SANCHEZ Hector Jorge
artículos
Título:
A Case Study of Elemental and Structural Composition of Dental Calculus During Several Stages of Maturation Using SRXRF
Autor/es:
J. ABRAHAM; M.S. GRENÓN; HECTOR JORGE SANCHEZ; C. A. PÉREZ; R.A. BARREA
Revista:
Journal of Biomedical Materials Research
Referencias:
Año: 2005 vol. 75A p. 623 - 628
ISSN:
0021-9304
Resumen:
Abstract: This work presents a study of elemental composition
and preponderant structure of human dental calculus,
as they mature in the mouth for a period of 1 year. The
synchrotron radiation X-ray fluorescence technique using a
white beam was employed as an analytical method. The set
of samples were extracted from different dental elements of
the same subject, who did not require any other clinical care.
By means of analyzing the Ca/P molar ratio an estimation of
the main crystallographic structure was attained, by simple
comparison with stoichiometric values of the several crystalline
structures that compose the calculus. The results
showed a slowly progressive transformation of the initial
crystalline structures (brushite) into more stable structures
(hydroxyapatite), passing through octacalcium phosphate
and whitlockite. The concentrations of mayor components
(Ca and P) as a function of time followed a sigmoid curve.
The analysis of trace element concentratios versus time indicated
a null or small correlation of concentration values
with the kinetics of the crystallization process. © 2005 Wiley
Periodicals, Inc. J Biomed Mater Res 75A: 623628, 2005This work presents a study of elemental composition
and preponderant structure of human dental calculus,
as they mature in the mouth for a period of 1 year. The
synchrotron radiation X-ray fluorescence technique using a
white beam was employed as an analytical method. The set
of samples were extracted from different dental elements of
the same subject, who did not require any other clinical care.
By means of analyzing the Ca/P molar ratio an estimation of
the main crystallographic structure was attained, by simple
comparison with stoichiometric values of the several crystalline
structures that compose the calculus. The results
showed a slowly progressive transformation of the initial
crystalline structures (brushite) into more stable structures
(hydroxyapatite), passing through octacalcium phosphate
and whitlockite. The concentrations of mayor components
(Ca and P) as a function of time followed a sigmoid curve.
The analysis of trace element concentratios versus time indicated
a null or small correlation of concentration values
with the kinetics of the crystallization process. © 2005 Wiley
Periodicals, Inc. J Biomed Mater Res 75A: 623628, 2005
Key words: dental calculus; maturation; SRXRFdental calculus; maturation; SRXRF
