The scattering phase functions for HeNe-laser light of dentine sections 10-20 micron(s) thick were measured. The functions perpendicular to the tubules had first-order maxima at angles of 4 degrees for bovine dentine and 5 degrees for human dentine; those parallel to the tubules showed no first-order maxima. Several corrections were made before the asymmetry factors g for intertubular dentine w...

Liberation of the sequestrated bioactive molecules from dentine by the action of applied dental materials has been proposed as an important mechanism in inducing a dentinogenic response in teeth with viable pulps. Although adhesive restorations and dentine-bonding procedures are routinely practiced, clinical protocols to improve pulp protection and dentine regeneration are not currently driven ...

Rat odontoblasts were shown to synthesize and secrete gamma-carboxyglutamic acid(Gla)-containing proteins into dentine after organ culture in the presence of radiolabelled amino acid precursors. Purified dentine Gla-containing protein from rat incisors was used as antigen to prepare rabbit antisera as a probe of dentine Gla-containing-protein biosynthesis in organ cultures of dentine (rat incis...

Auto-degradation of collagen matrices occurs in resin-infiltrated dentine by the slow action of host-derived matrix metalloproteinases. As phosphoric acid-etching inactivates these endogenous enzymes, it is puzzling how hybrid layers created by simplified etch-and-rinse adhesives can degrade in vivo. This study tested the null hypothesis that there are no differences in the relative proteolytic...

AIM To compare using scanning electron microscopy (SEM) root canal walls following instrumentation in vitro with two different rotary NiTi instruments. The hypothesis was that no difference should be observable between the experimental groups in terms of debris on canal walls and surface morphology. METHODOLOGY Twenty-four single-rooted human teeth were selected. Two types of NiTi instruments...

OBJECTIVES The purpose of this study was to evaluate the changes in dentinal permeability (i.e. hydraulic conductance) after prophylactic treatment performed using prophy-powders with air-polishing system or prophy-pastes applied on exposed middle dentine. The changes in dentine morphology were evaluate by SEM. STUDY DESIGN Several prophylactic pastes or air-polishing powders were tested in t...

OBJECTIVE The purpose of this study was to evaluate the influence of Er:YAG laser irradiation on the bond strength to dentine of three single-step adhesives (AQ Bond Plus, G-Bond, and Clearfil Tri-S Bond), and one two-step self-etch adhesive (Clearfil Megabond) as a control. BACKGROUND DATA The vast majority of the numerous reports on resin bonding to Er:YAG-lased dentine have concluded that ...

In recent years, scientists have developed various biomaterials to remineralize human teeth to treat dentine hypersensitivity. Poly(amido amine) (PAMAM) dendrimers have become a research focus in this field. It has been demonstrated that PAMAM is able to create precipitates both on the surface of and within the dentinal tubules, however, there is little information about its effect on reducing ...