scholarly journals Inhibition of enamel mineral loss by fissure sealant: An in situ study

2013 ◽  
Vol 41 (1) ◽  
pp. 42-50 ◽  
Author(s):  
Kamila Rosamilia Kantovitz ◽  
Fernanda Miori Pascon ◽  
Francisco Humberto Nociti ◽  
Cinthia P. Machado Tabchoury ◽  
Regina Maria Puppin-Rontani
Keyword(s):  
Fissure Sealant ◽  
In Situ Study ◽  
Mineral Loss

Protective Effect of the Dental Pellicle against Erosive Challenges in situ

2006 ◽  
Vol 85 (7) ◽  
pp. 612-616 ◽  
Author(s):  
A.T. Hara ◽  
M. Ando ◽  
C. González-Cabezas ◽  
J.A. Cury ◽  
M.C. Serra ◽  
...  
Keyword(s):  
Protective Effect ◽  
Orange Juice ◽  
Dental Erosion ◽  
Surface Microhardness ◽  
Protection Level ◽  
Lesion Depth ◽  
In Situ Study ◽  
Mineral Loss

The acquired dental pellicle helps prevent erosion, but the protection level is unknown. This in situ study tested whether a two-hour pellicle protects against different erosive challenges by orange juice. Subjects wore palatal appliances loaded with either enamel or dentin specimens. Pellicle was allowed to form, or not (control), on the surfaces of the specimens intra-orally for 2 hrs before the erosive challenges of 0 (control), 10, 20, and 30 minutes’ duration. Specimens were randomly removed from the appliances after each challenge. Percentage of surface microhardness change (%SMC) was determined for the enamel specimens, and that of mineral loss and lesion depth for the dentin specimens. Enamel specimens with the pellicle showed a significantly lower %SMC, only after the 10-minute challenge. No protection was found for dentin. It was concluded that the acquired pellicle reduced dental erosion, but that this effect was limited to the less severe erosive challenge on enamel surfaces.

scholarly journals Anticaries Potential of a Sodium Monofluorophosphate Dentifrice Containing Calcium Sodium Phosphosilicate: Exploratory in situ Randomized Trial

2017 ◽  
Vol 51 (2) ◽  
pp. 170-178 ◽  
Author(s):  
Charles R. Parkinson ◽  
Muhammad Siddiqi ◽  
Stephen Mason ◽  
Frank Lippert ◽  
Anderson T. Hara ◽  
...  
Keyword(s):  
Bioactive Glass ◽  
Randomized Trial ◽  
Dentin Hypersensitivity ◽  
Surface Microhardness ◽  
Single Centre ◽  
Lesion Depth ◽  
In Situ Study ◽  
Caries Lesions ◽  
Mineral Loss

Calcium sodium phosphosilicate (CSPS) is a bioactive glass material that alleviates dentin hypersensitivity and is postulated to confer remineralization of caries lesions. This single-centre, randomized, single (investigator)-blind, placebo-controlled, crossover, in situ study explored whether the addition of 5% CSPS to a nonaqueous fluoride (F) such as sodium monofluorophosphate (SMFP)-containing dentifrice affects its cariostatic ability. Seventy-seven subjects wore 4 gauze-covered enamel specimens with preformed lesions (2 surface-softened and 2 subsurface) placed buccally on their mandibular bilateral dentures for up to 4 weeks. Subjects brushed twice daily with 1 of the 5 study dentifrices: 927 ppm F/5% CSPS, 927 ppm F/0% CSPS, 250 ppm F/0% CSPS, 0 ppm F/5% CSPS, or 0 ppm F/0% CSPS. Specimens were retrieved after either 21 (surface-softened lesions; analyzed by Knoop surface microhardness [SMH]) or 28 days (subsurface lesions; analyzed by transverse microradiography). The enamel fluoride uptake was determined for all specimens using a microbiopsy technique. The concentrations of fluoride and calcium in gauze-retrieved plaque were also evaluated. Higher dentifrice fluoride concentrations led to greater remineralization and fluoridation of both lesion types and increased plaque fluoride concentrations. CSPS did not improve the cariostatic properties of SMFP; there were no statistically significant differences between 927 ppm F/5% CSPS and 927 ppm F/0% CSPS in percent SMH recovery (p = 0.6788), change in integrated mineral loss (p = 0.5908), or lesion depth (p = 0.6622). Likewise, 0 ppm F/5% CSPS did not provide any benefits in comparison to 0 ppm F/0% CSPS. In conclusion, CSPS does not negatively impact nor does it improve the ability of an SMFP dentifrice to affect remineralization of caries lesions.

scholarly journals In situ study of microstructure in phase transformation of pipe line steel

2021 ◽  
Vol 27 (S1) ◽  
pp. 1554-1555
Author(s):  
Chen Gu ◽  
Nabil Bassim ◽  
Hatem Zurob
Keyword(s):  
Phase Transformation ◽  
In Situ Study ◽  
Line Steel ◽  
Pipe Line

A novel device for in situ study of gas adsorption under rotation

2021 ◽  
Vol 92 (4) ◽  
pp. 045106
Author(s):  
R. I. Kosheleva ◽  
T. D. Karapantsios ◽  
M. Kostoglou ◽  
A. Ch. Mitropoulos
Keyword(s):  
Gas Adsorption ◽  
Novel Device ◽  
In Situ Study

scholarly journals In Situ Study of the Wet Chemical Etching of SiO2 and Nanoparticle@SiO2 Core–Shell Nanospheres

2021 ◽  
Author(s):  
Albert Grau-Carbonell ◽  
Sina Sadighikia ◽  
Tom A. J. Welling ◽  
Relinde J. A. van Dijk-Moes ◽  
Ramakrishna Kotni ◽  
...  
Keyword(s):  
Chemical Etching ◽  
Core Shell ◽  
In Situ Study ◽  
Wet Chemical ◽  
Wet Chemical Etching
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