Micro determination of carbonate in dental enamel

The Analyst ◽  
1968 ◽  
Vol 93 (1105) ◽  
pp. 244 ◽  
Author(s):  
J. A. Weatherell ◽  
C. Robinson
Keyword(s):  
Dental Enamel

XPS determination of the thickness of adsorbed mouthrinse components on dental enamel

1990 ◽  
Vol 15 (5) ◽  
pp. 344-346 ◽  
Author(s):  
H. J. Busscher ◽  
H. C. Van der Mei ◽  
M. J. Genet ◽  
J. F. Perdok ◽  
P. G. Rouxhet
Keyword(s):  
Dental Enamel

Determination of Mineral Concentration in Dental Enamel from X-ray Attenuation Measurements

1998 ◽  
Vol 38 (1-4) ◽  
pp. 61-72 ◽  
Author(s):  
J. C. Elliott ◽  
F. S. L. Wong ◽  
P. Anderson ◽  
G. R. Davis ◽  
S. E. P. Dowker
Keyword(s):  
Dental Enamel ◽  
Mineral Concentration ◽  
X Ray

Quantitative Study of Fluoride Transport During Subsurface Dissolution of Dental Enamel

1989 ◽  
Vol 68 (1) ◽  
pp. 32-41 ◽  
Author(s):  
J.S. Chu ◽  
J.L. Fox ◽  
W.I. Higuchi
Keyword(s):  
Pore Solution ◽  
Dental Enamel ◽  
Primary Objective ◽  
Acid Attack ◽  
Mineral Density ◽  
Density Profiles ◽  
Demineralized Enamel ◽  
Intact Surface ◽  
Bovine Enamel

Previous studies using bovine dental enamel as a model have shown that surface and subsurface dissolution of enamel may be governed by micro-environmental solution conditions. We have now investigated the demineralization phenomenon more rigorously with the primary objective of developing a method for deducing solution species concentration profiles as a function of time from appropriate experimental data. More specifically, in this report, a model-independent method is described for determination of the pore solution fluoride gradients in bovine enamel during subsurface demineralization. Microradiography was used to determine the mineral density profiles, and an electron microprobe technique to determine total fluoride (F) profiles associated with the enamel. In each case, matched sections of bovine enamel were exposed to partially saturated acetate buffers at pH = 4.5 containing 0.5 ppm F for various periods of time (from six to 24 hours). The treated enamel was found to have an intact surface layer and subsurface demineralization. The extent of the demineralization and the depths of the lesions increased with time in all cases. The data were farst used to calculate (a) the total F gradients in the enamel at various times, and (b) the local uptake rate of F as a function of time and position. Then, by manipulation of the equations describing the uptake and transport of F, we calculated the pore diffusion rate of F and the micro-environmental solution F concentration in the aqueous pores as a function of time and of distance from the enamel surface. It was also possible to calculate an intrinsic F diffusion coefficient in the pores, which was about 1.0 × 10-5 cm2/ sec, in good agreement with reported values. 14C-sucrose uptake and release experiments with identically prepared demineralized enamel sections were also conducted to provide an independent check on the assumed dependence of porosity on mineral density. The results of this investigation, especially the outcomes relative to this new method for determination of pore solution F gradients during acid attack of the dental enamel, should be valuable in future studies of the mechanism(s) of the action of F in inhibiting dental enamel demineralization.

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