ABSTRACTS – Contributed Posters simulated mucus(mucus) prepared similar to airway mucus of healthy individuals and patients with a wide range of airway diseases such as cystic fibrosis (CF), chronic obstructive pulmonary disease (COPD) and asthma,. Developed method was tested against adhesivity measured by a previously described method for viscoelastic materials (Majumder et al., Science <strong>31</strong>8, 258 (2007)). Effect of adhesivity on mucus displacement inside a model adult trachea during coughs of 300ms at low velocity (12±0.5ms -1 ), generated using a computer controlled solenoid valve was investigated. Adhesivity decreased significantly with surface energy of solid and viscosity (p
ABSTRACTS – Contributed Posters location on the tooth. Overall, the BAG2-sealant samples strengthened and became significantly harder than the other sample groups. (ANOVA/Tukey’s; α=0.05). The inclusion of BAG as a filler component results in a harder tooth that may be better able to resist demineralization. 192 Met and Unmet Need for Dental Services in a National Sample of Children with Varying Disabilities, VANESSA LAM*, JACLYN AVILA*, RICHARD MORRIS*, YAN WANG, HONGHU LIU, and MARVIN MARCUS (UCLA School of Dentistry Post-Baccalaureate Program, Division of Public Health and Community Dentistry, 10833 Le Conte Avenue, Los Angeles, CA 90095; vanessalam.18@ gmail.com, jaclynann44@gmail.com, rich.morris06@gmail. com). Children with special health care needs (CSHCN) have unique issues when it comes to unmet need for dental care. There are over 8 million American children who are CSHCN; however, there are gaps in our understanding of the factors that are associated with unmet need. The purpose is to study the perceived met and unmet need for preventive and other dental care of children based on their caregivers’ perception of their need for assistance in performing daily functions. Data were analyzed from the 2005-2006 National Survey of Children with Special Health Care Needs (NS- CSHCN), based upon interviews with 40,840 caregivers. Univariate, bivariate, and multivariate analyses using SAS were performed. The dependent variable is the need for met and unmet preventive and other dental care for CSHCN; the independent variable is the caregiver’s perception of the need for assistance performing daily activities; controlling for demographics and family characteristics. About 23% of CSHCN having more debilitating conditions were more likely to have unmet need for preventive and other dental care, compared to CSHCN with less debilitating conditions. Latinos and blacks are more likely to have unmet need for both preventive and other care. Compared to children living in two-parent families, children in foster care and children in single-mother families are also more likely to have unmet dental needs. Disparities in unmet needs are found with CSHCN based on need for assistance, ethnicity, and family structure. 193 Active Dental Caries and Adults’ Use of Antidepressants in a National Probability Sample, OGORCHUKWU OLELE*, ADRIANNA JAUREGUI*, YAN WANG, HONGHU LUI, and MARVIN MARCUS (UCLA School of Dentistry Post-Baccalaureate Program, Division of Public Health and Community Dentistry, 10833 Le Conte Avenue, Los Angeles, CA 90095; olele@usc.<strong>edu</strong>, adrianaj12@yahoo.com). The National Health and Nutrition Examination Survey (NHANES) estimates that 39 million adults in the United States have untreated active dental caries. One cause of dental caries in adults is dry mouth, also known as xerostomia. Antidepressants are known to produce dry mouth. The objective of this study is to identify and examine the relationship between active dental caries and the use of antidepressants controlling for socio-demographic and behavioral characteristics. The 2007- 2008 NHANES data set used for this analysis represents 196 million adults in the United States. The dependent variable is active dental caries. The independent variable is the use of antidepressants, other medications, and no medication use. We conducted univariate, bivariate, and multivariate analysis. Although we hypothesized that antidepressants would be associated with active dental caries, it did not occur. However, taking other medications r<strong>edu</strong>ced the likelihood of having active dental caries by 41% in comparison to those who do not take any medications. We observed a linear relationship between active dental caries and <strong>edu</strong>cation, controlling for age, ethnicity, smoking, and general health. Furthermore, the results corresponding to ethnicity indicated that the Latino and black populations are highly impacted by active dental caries. Those taking other medications are less likely to have active dental caries. This effect occurred even though we controlled for age, gender, perceived general health, and smoking. This opens up an area for fruitful research to determine the types of medications that are responsible for this relationship. GENERAL and INTERDISCIPLINARY 194 Psychostimulant Use Among College Students During Periods of High and Low Stress: An Interdisciplinary Approach Utilizing Both Self-Report and Unobtrusive Chemical Sample Data, RAMSEY LARSON 1 *, MIKAEL FERM 1 , DAVID MOORE 1 , and DAN BURGARD 2 ( 1 Department of Psychology, University of Puget Sound, 1500 N. Warner, Tacoma, WA 98416; 2 Department of Chemistry, University of Puget Sound, 1500 N. Warner, Tacoma, WA 98416; rlarson@puget<strong>sou</strong>nd.<strong>edu</strong>). The present study used both self-report measures and chemical data derived from campus wastewater samples to investigate psychostimulant use among undergraduate students at periods of high and low stress over the course of a semester. Web-based surveys were administered at three time periods: during the first week of school (Time 1; N = 676), midterms (Time 2; N = 468), and shortly before final exams (Time 3; N = 400). Wastewater samples were collected on campus at similar times, and the metabolites of Adderall and Ritalin were quantified through solid phase extraction and liquid chromatography-tandem mass spectrometry. Survey results indicated that non-prescriptive use of Adderall was roughly three times higher at Time 2 than at Time 1. Although reported non-prescriptive Adderall use was also higher at Time 3 compared to Time 1, this difference was not statistically significant. Chemical sample results 105
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