Measurement of multichannel continuous-wave near-infrared spectroscopy (CW-NIRS) is dependent on the modified Beer-Lambert law, which includes optical pathlength (PL) as an essential parameter. PLs are known to differ across different head regions and different individuals, but the distribution of PLs for the whole head has not been evaluated so far. Thus, using time-resolved near-infrared spec...

Glass ionomer cement, besides being used as restorative material, can also be used as pit and fissure sealant. The use of glass ionomer cement as pit and fissure sealant has added benefit by its fluoride-releasing property that results in increased resistance of the fissures to demineralize. The capacity of a sealant to prevent microleakage into the fissure is important, since microleakage may ...

F or adequate sealant retention, the bonding surface area must be maximized and the enamel clean, free of salivary contamination, and dry at the time of sealant placement.I, 2 However, because pit and fissure sealants bond to the cuspal incline planes and not to the bottoms of the pits and fissures,B_6 insufficient curing of the resin sealant could reduce the bond strength. The purpose of this ...

PURPOSE Sealants form a physical barrier between the oral environment and deep fissures that contribute to caries prevention. It is postulated that sealants possessing antibacterial properties are advantageous. The purpose of this study was to evaluate the antibacterial properties of four pit and fissure sealants using direct contact test (DCT) and agar diffusion test (ADT). METHODS For the D...

Medical Subject Headings (MeSH): cariostatic agents, community dentistry, community health planning, community health services, decision making, dental caries, evidencebased medicine, facial injuries, fluoridation, intervention studies, meta-analysis, mouth protectors, oral health, pharyngeal neoplasms, pit and fissure sealants, practice guidelines, preventive dentistry, preventive health servi...

The objective of this study was to compare the abrasion resistance, resistance to penetration, and mode of deformation of a filled (A*) and two unfilled (Bt and C$) pit and fissure sealants. Samples were mixed following manufacturers' instructions and stored at 37 C for 24 hours before testing. Five cylindrical samples of each sealant were abraded on silicon carbide paper§ with continuous flush...

OBJECTIVE This clinical study compared the retention rates of a nanofilled occlusal fissure sealant placed with the use of an etch-and-rinse or a self-etch adhesive over 24 months. METHODS Two-hundred and forty-four sealants were placed on the permanent premolars and molars of 16 subjects who had no restorations or sealants present on the fissures and no detectable caries. The sealants were p...

The clinical behavior of Concise and Prisma Shield sealants for pit and fissure was analyzed by clinical/photographic evaluation. A hematoxylin-based staining solution was applied to the occlusal surface 7 days, 18 months, 36 months, and 11 years after the occlusal sealing, thus allowing the sealant material on the surface to be checked. At each analysis time, each occlusal surface was photogra...

The occlusal fissures of 61 matched pairs of first permanent molars in children aged 6-9 years were sealed. The experimental tooth of each pair was prepared mechanically by running a #1 round bur in the fissure area. After 6 years, 34 pairs were available for examination. Of 19 pairs of mandibular molars sealed, 4 molars of the control and 2 of the experimental groups sustained partial or total...