Anisotropy effects of EPR signals and mechanisms of mass transfer in tooth enamel and bones

EPR dosimetry with tooth enamel: A review

“…Therefore, tooth enamel should be modelled as made up of three phases: a bulk mineral, a bulk organic, and a protein-mineral interface. This model is in line with that proposed by Brik et al (2000b), who surmised that the organic component consists of two subsystems, which they called "Organic 1" and "Organic 2". The first subsystem fills the space between the enamel prisms and is 10-20 nm 81 thick (perhaps corresponding to the bulk organic described above).…”

“…Water-organic subsystems in enamel are not very stable, indeed. Brik et al (2000b) are the only authors to point to a possible effect of metabolism and tooth disease on the accuracy of dose measurements. Also, one of the co-authors of this review has warned that the signals used in EPR tooth dosimetry are in large part from CO 2 -radicals in essentially unstable locations (Callens et al, 1998).…”

NaOCl effects on primary and permanent pulp chamber dentin

“…These reactions could solubilize some mineral molecules, leading a slow dissolution of encapsulated collagen of dentin, the so called ''organic 2'' component which covers the hydroxyapatite nanocrystals and is 2-5 nm thick. 39 This change could produce unbound hydroxyapatite crystals, 40,41 and reveal a mineral surface rich in hydroxyl, carbonate, and phosphate groups as seen by Di Renzo et al 40 The exposition of unbound hydroxyapatite crystals by NaOCl irrigation could increase the area of adhesion of the dentin after etching. Would the resin monomers be able to penetrate within a whole of this area?…”

Evidence of annealing-induced transformation of radicals in irradiated tooth enamel

“…The cleaned enamel was cut into the plates of approximately 1 × 2 × 3 mm 3 . Further we use the hpv coordinates system suggested in Brik et al (2000). Here axis p corresponds to the perpendicular to the enamel surface and axis v is the axis of tooth growth.…”