Faculty Bibliography

The weather-related disasters in 2017 in Texas, Florida, Puerto Rico, the 2017-2018 wildfire seasons in California and Hurricanes Florence and Michael in 2018 have challenged all healthcare professionals, to have plans in place to protect their facility, patients, and staff from all possible hazards. These were "slowly developing" events, with enormous media coverage, and yet the results were still horrific. The need to have both a good evacuation plan and a good shelter-in-place plan has previously been dramatically demonstrated. When planning for disasters, it is critical for healthcare providers to understand the nature of a particular event and its possible consequences. When the concern arises about either an individual medical facility, or a whole community's well-being, a proper response requires significant levels of preparedness, education, and training. Comprehension of the threat and an understanding of the resources available to combat an event can significantly mitigate the possible damage. This article reviews a dental school curriculum to prepare students to respond to such contingencies while describing the goals, and sources for a disaster preparedness syllabus.

The understanding of cuspal deflection and volumetric shrinkage of resin composites is necessary to assess and improve the placement techniques of resin-based materials. The aim of this study was to investigate the cuspal deflection and its relationship with volumetric polymerization shrinkage of different bulk-fill resin composites. The investigation was conducted using non-contact phase microscopy and micro-computed tomography. Thirty custom-milled aluminum blocks were fabricated for microscopy analysis and thirty-six tooth models with standardized Class I cavities were used for micro-computed tomography analysis. Results showed that high-viscosity composites present higher cuspal deflection compared to bulk-fill composites. The filler loading of resin composites seems to have an effect on cusp deflection, since the higher the filler content percentage, the higher the cusp deflection. On the other hand, it seems to have an opposite effect on volumetric shrinkage, since higher filler loadings produced lower volumetric shrinkage percentages.

Dental caries remains a world-wide disease despite the global distribution of fluoride. It has become apparent that the introduction of significant levels of sugar (fermentable carbohydrate) into the diet has resulted in a change in the biofilm, encouraging acid formation. Further, there has been a shift in the microbiota in the biofilm to a flora that produces acid, and thrives and reproduces in an acidic environment. The management of caries activity under these conditions has focused on brushing to remove the biofilm with fluoride pastes, and high-dose fluoride treatments. Kleinberg, in the 1970s, identified an arginine-containing compound in saliva that several oral biofilm bacterial species metabolize to produce base. Multiple in situ and in vivo studies have been conducted, and have discussed the ability of multiple bacteria to increase the resting pH of the biofilm and even reduce the decrease in pH when the biofilm is challenged with glucose. This shift in resting pH can shift the level of caries formation by the biofilm. Here, we present 8 clinical studies, with different clinical designs, measuring different clinical outcomes, for a diverse, world-wide population. Each of these studies demonstrates reductions in caries formation beyond that seen with fluoride alone and several demonstrate the reversal of early caries lesions. Significant clinical research has been shown that 1.5% arginine combined with fluoride toothpaste has superior anti-caries efficacy to toothpaste containing fluoride alone.

One hundred-twenty composite restorations were placed either for new carious lesions or for restorations requiring replacement. All restorations were randomized by surface and restoration class. Eighty Class II restorations were placed on molars. The remaining 40 were placed on premolars, all of which were bonded. In summary, there were no differences in objective measurements of the 111 restorations recalled at six months and at 12 months. Measurements of the iBOND and GLUMA restorations included margin staining, margin breakdown, surface wear and postoperative hypersensitivity. The quicker one-step offers the advantage of timesavings, with no loss of excellent results, compared to the two-step etching technique. [ABSTRACT FROM AUTHOR]