Δευτέρα 30 Οκτωβρίου 2017

Natural enamel caries in quinoline: Volumetric data and the pattern of infiltration

Abstract

This study aimed to test the hypotheses that (i) a parameter related to permeability, αd (ratio of squared water volume by the nonmineral volume) is, among all major component volumes (mineral, water, and organic volumes) the best predictor of quinoline infiltration in natural enamel caries (NEC), and (ii) the pore volume fraction infiltrated by quinoline (Vqui) in NEC is much lower than previous estimates that neglected water and organic enamel volumes. Mineral and nonmineral volumes and αd were measured at 341 histological points (from 20 approximal NEC lesions), and transport of quinoline was tracked by orientation-independent polarizing microscopy. R2 values of Vqui were 0.596 (αd), 0.033 (mineral volume), 0.474 (water volume), and 0.011 (organic volume). Vqui values were 23% (body of the lesion), 7% (dark zone), and 9% (translucent zone), lower than previous estimates (with high effect size). Transport of quinoline occurred both parallelly and perpendicularly to prism paths, and dark zones were seen where only transport parallel to prisms occurred. In conclusion, αd was the main predictor of quinoline infiltration, but it differed from the water volume with a small effect size, and the pore volume fraction with quinoline was much lower than previous estimates.

Thumbnail image of graphical abstract
  • Volume of oil infiltrated in enamel caries is presented for histological zones relevant for progress and reversal of caries.
  • Oil infiltrated < 50% of the enamel pore volume and it is well correlated with permeability but not with mineral content.


from #AlexandrosSfakianakis via Alexandros G.Sfakianakis on Inoreader http://ift.tt/2ielE2y
via IFTTT

Δεν υπάρχουν σχόλια:

Δημοσίευση σχολίου

Δημοφιλείς αναρτήσεις