A tale of two public dental benefit programs: Iowa dentist participation in traditional Medicaid versus a Medicaid expansion program.

BACKGROUND: In Iowa from 2014 to 2017, there were 2 separate public dental benefit programs for Medicaid-enrolled adults: one for the Medicaid expansion population called the Dental Wellness Plan (DWP), and one for the traditional, non-expansion adult Medicaid population. The programs differed with respect to reimbursement, administration, and benefit structure. This study explored differences in patterns and predictors of dentist participation in the two programs. METHODS: Authors sent a survey to all private practice dentists in Iowa (n = 1301) 2 years after DWP implementation. Descriptive, bivariate, and logistic regression analyses were used to examine patterns and predictors of dentist participation in Medicaid and DWP. RESULTS: Overall rates of dentists' acceptance of new Medicaid and DWP patients were 45 and 43%, respectively. However, Medicaid participants were much more likely than DWP participants to place limits on patient acceptance. Adjusting for other factors, practice busyness was the only significant predictor of DWP participation, and practice location was the only significant predictor of Medicaid participation. Dentists who were not busy enough were more than twice as likely to participate in DWP compared to others, and dentists in rural areas were almost twice as likely to participate in Medicaid compared to dentists in urban areas. CONCLUSIONS: Dentist participation in Medicaid is an ongoing concern for states aiming to ensure access to dental care for low-income populations. We found distinct participation patterns and predictors between a traditional Medicaid dental program and the DWP, suggesting different motivations for participation between the two programs.

Career influences among final year dental students who plan to enter private practice.

BACKGROUND: Existing research about the influence of educational debt on students' decision to enter general practice immediately after graduation is conflicting. Other potential factors that could affect this decision include the influence of a spouse or other family member, the importance of a mentoring dentist, and how students perceive the burden of their debt. The goal of this study was to examine the importance of debt on career decision-making while also considering the role of other influences. METHODS: Responses to a self-completed questionnaire of all final (fourth) year students at the University of Iowa College of Dentistry from 2007 through 2010 were analyzed to identify the importance of educational debt and the influence of spouses, other family members, and mentoring dentists in the decision to enter private general practice immediately after graduation. Statistical analysis included bivariate tests (t-tests and Chi-square tests) and multivariable logistic regression. RESULTS: 58.9% of respondents (N = 156) planned to immediately enter private practice after dental school. Bivariate analyses revealed women to be more likely to enter private practice than their male counterparts (69.0% vs. 51.8%, p = .006). Students planning to enter practice immediately did not differ significantly from those with other career plans on the basis of marital status or having a family member in dentistry. Anticipated educational debt of at least $100,000 was positively associated with plans to enter private practice immediately after graduation. Self-reported importance of educational debt was not associated with career plans. However, the influence of a spouse, other family members, and family dentists were also positively associated with the decision to enter private practice. These factors all maintained significance in the final multivariable model (p < 0.05); however, educational debt of at least $100,000 was the strongest predictor of plans to enter private practice (OR = 2.34; p = 0.023). CONCLUSIONS: Since the 1970s, increasing numbers of dentists in the U.S. have pursued specialty training after dental school. However, rising educational debts may counter this trend as increasing numbers of dentists choose to immediately pursue general dentistry at graduation. This project has demonstrated the significant influence of educational debt, beyond other external influences.

Relationship between medical well baby visits and first dental examinations for young children in Medicaid.

OBJECTIVES: We examined the relationship between preventive well baby visits (WBVs) and the timing of first dental examinations for young Medicaid-enrolled children. METHODS: The study focused on children born in 2000 and enrolled continuously in the Iowa Medicaid Program from birth to age 41 months (n = 6322). The main predictor variables were number and timing of WBVs. The outcome variable was timing of first dental examination. We used survival analysis to evaluate these relationships. RESULTS: Children with more WBVs between ages 1 and 2 years and ages 2 and 3 years were 2.96 and 1.25 times as likely, respectively, to have earlier first dental examinations as children with fewer WBVs. The number of WBVs before age 1 year and the timing of the WBVs were not significantly related to the outcome. CONCLUSIONS: The number of WBVs from ages 1 to 3 years was significantly related to earlier first dental examinations, whereas the number of WBVs before age 1 year and the timing of WBVs were not. Future interventions and policies should actively promote first dental examinations by age 12 months at WBVs that take place during the first year of life.

Rural-urban differences in dental service use among children enrolled in a private dental insurance plan in Wisconsin: analysis of administrative data.

BACKGROUND: Studies on rural-urban differences in dental care have primarily focused on differences in utilization rates and preventive dental services. Little is known about rural-urban differences in the use of wider range of dental procedures. This study examined patterns of preventive, restorative, endodontic, and extraction procedures provided to children enrolled in Delta Dental of Wisconsin (DDWI). METHODS: We analyzed DDWI enrollment and claims data for children aged 0-18 years from 2002 to 2008. We modified and used a rural and urban classification based on ZIP codes developed by the Wisconsin Area Health Education Center (AHEC). We categorized the ZIP codes into 6 AHEC categories (3 rural and 3 urban). Descriptive and multivariable analysis using generalized linear mixed models (GLMM) were used to examine the patterns of dental procedures provided to children. Tukey-Kramer adjustment was used to control for multiple comparisons. RESULTS: Approximately, 50%, 67% and 68% of enrollees in inner-city Milwaukee, Rural 1 (less than 2500 people), and suburban-Milwaukee had at least one annual dental visit, respectively. Children in inner city-Milwaukee had the lowest utilization rates for all procedures examined, except for endodontic procedures. Compared to children from inner-city Milwaukee, children in other locations had significantly more preventive procedures. Children in Rural 1-ZIP codes had more restorative, endodontic and extraction procedures, compared to children from all other regions. CONCLUSIONS: We found significant geographic variation in dental procedures received by children enrolled in DDWI.

Predictors of Multiple Jobholding among Dental Hygienists in the State of Iowa.

Purpose: Little is known about the prevalence of multiple jobholding practices among dental hygienists or the factors contributing to these employment patterns. The purpose of this exploratory study was to examine predictors of multiple jobholding practices among dental hygienists in the state of Iowa.Methods: A mailed paper survey was sent to all licensed dental hygienists (n=2080) in Iowa in May 2018. The dependent variable was whether hygienists worked more than one job in dental hygiene. Key independent variables included individual, family, and practice-related factors. Descriptive, bivariate, and binary logistic regression analyses were completed.Results: A total of 1215 dental hygienists participated in the survey, for a response rate of 58%. Among respondents, 12.2% worked more than one job overall, with 10.7% working 2 jobs and 1.5% working three or more. Respondents who had at least a bachelor's degree, did not have children in the household, were not married, had worked more years at their primary job, and worked more hours per week, were more likely to hold multiple jobs after adjusting for other factors.Conclusions: Consistent with national estimates, there was a high multiple jobholding rate among dental hygienists in Iowa. Multiple individual, family, and practice characteristics were found to be related to multiple jobholding, with the strongest predictors being the hygienist's highest level of education and the number of hours worked at the primary job.

Preventive dental utilization for Medicaid-enrolled children in Iowa identified with intellectual and/or developmental disability.

OBJECTIVES: To compare preventive dental utilization for children with intellectual and/or developmental disability (IDD) and those without IDD and to identify factors associated with dental utilization. METHODS: We analyzed Iowa Medicaid dental claims submitted during calendar year (CY) 2005 for a cohort of children ages 3-17 who were eligible for Medicaid for at least 11 months in CY 2005 (n = 107,605). A protocol for identifying IDD children was developed by a group of dentists and physicians with clinical experience in treating children with disabilities. Utilization rates were compared for the two groups. Crude and covariate-adjusted odds ratios were estimated using conditional logistic regression modeling. RESULTS: A significantly higher proportion of non-IDD children received preventive care than those identified as IDD (48.6 percent versus 46.1 percent; P < 0.001). However, the final model revealed no statistically significant difference between the two groups. Factors such as older age, not residing in a dental Health Professional Shortage Area, interaction with the medical system, and family characteristics increased one's likelihood of receiving preventive dental care. CONCLUSION: Although IDD children face additional barriers to receiving dental care and may be at greater risk for dental disease, they utilize preventive dental services at the same rate as non-IDD children. Clinical and policy efforts should focus on ensuring that all Medicaid-enrolled children receive need-appropriate levels of preventive dental care.

Dentists' treatment of underserved populations following participation in community-based clinical rotations as dental students.

OBJECTIVE: The purpose of this study was to identify which underserved populations are being treated by dentists after participation in community-based clinical rotations as dental students and to determine which predictor variables are associated with dentists' treatment of these populations. METHODS: A 25-item written survey was developed and mailed to University of Iowa College of Dentistry alumni (1992-2002; N = 745) to assess what percentage of their current total patient population was composed of each of the twelve identified populations. Separate statistical analyses (descriptive, bivariate, and generalized logistic regression) were performed for each underserved population. RESULTS: Three-hundred seventy-two dentists responded for an adjusted response rate of 50 percent. Respondents were most likely to treat "other ethnic groups" and low income populations. In contrast, 70 percent or more of all respondents said they never treat the homebound, homeless, and incarcerated. Additionally, over 40 percent of respondents said they never treat HIV+/AIDS patients and Medicaid patients. Logistic regression models showed that comfort in treating a population, treating more than seven populations, and having the total percentage of underserved populations treated within a practice total more than 50 percent were the most frequently associated (P < 0.05) and strongest predictors of treating the listed underserved populations. CONCLUSIONS: Although respondents reported treating most populations, community leaders and dentists should identify at-risk populations and develop protocols to help ensure that these populations are able to obtain, at a minimum, emergency care. Additionally, dental schools should develop educational curricula to help increase students' comfort in treating underserved populations.

The patient-centered dental home: A standardized definition for quality assessment, improvement, and integration.

OBJECTIVE: To develop the first standardized definition of the patient-centered dental home (PCDH). DATA SOURCES/STUDY SETTING: Primary data from a 55-member national expert panel and public comments. STUDY DESIGN: We used a modified Delphi process with three rounds of surveys to collect panelists' ratings of PCDH characteristics and open-ended comments. The process was supplemented with a 1-month public comment period. DATA COLLECTION/EXTRACTION METHODS: We calculated median ratings, analyzed consensus using the interpercentile range adjusted for symmetry, and qualitatively evaluated comments. PRINCIPAL FINDINGS: Forty-nine experts (89%) completed three rounds and identified eight essential PCDH characteristics, resulting in the following definition: "The patient-centered dental home is a model of care that is accessible, comprehensive, continuous, coordinated, patient- and family-centered, and focused on quality and safety as an integrated part of a health home for people throughout the life span." CONCLUSIONS: This PCDH definition provides the foundation for developing measures for research, care improvement, and accreditation and is aligned with the patient-centered medical home. Consensus among a broad national expert panel-including provider, payer, and accreditation stakeholder organizations and experts in medicine, dentistry, and quality measurement-supports the definition's usability and its potential to facilitate medical-dental primary care integration.

What do dental students learn in an ethics course? An analysis of student-reported learning outcomes.

The purpose of this article is to report first-year dental students' perceptions of their primary learning outcomes from a course in ethics and professionalism. Students were asked to identify one topic or theme from the course that might influence their professional practice. Responses from 232 students were analyzed according to the explicit topics taught in the course. The most commonly identified topics were confidentiality (21 percent), informed consent (21 percent), and obtaining assent from children and adolescents (19 percent). An ad hoc analysis of students' narratives provides preliminary evidence that students perceive an increased awareness of their role and obligations as a professional immediately after a course in ethics and professionalism. The long-term influence of coursework in ethics and professionalism remains unknown.

Dentists' comfort in treating underserved populations after participating in community-based clinical experiences as a student.

The purpose of this project was to determine new dentists' comfort levels in treating traditionally underserved populations after participating in two consecutive five-week community-based clinical experiences while in dental school. A written survey was mailed to all known University of Iowa alumni (1992-2002; N=745). Respondents were asked to rank their comfort levels in treating twelve underserved populations on a five-point Likert type scale (5=no problem; 1=will not). Bivariate and logistic regression model analyses were performed to examine associations (p<0.05) among comfort and six predictor variables. Alumni (n=372) were most comfortable treating other ethnic, low-income, non-English-speaking, and HIV+/AIDS populations and least comfortable treating incarcerated and homebound populations. The following variables were significantly associated with comfort: 1) perception that the community experiences had great/much value; 2) practice located in larger communities; 3) non-solo practitioners; and 4) dentist's gender. As more dental schools utilize community-based clinical experiences to increase students' exposure to underserved populations, it is important that these experiences provide exposure to a variety of populations. Additionally, dental schools should continuously monitor the short- and long-term value of these programs for their students and recent graduates.

Relationship between community-level variables and number of general dentists.

BACKGROUND: In this study, the authors used observational data from 2014 to evaluate the association between the number of general dentists and several community characteristics. METHODS: The authors collected community-level characteristics from secondary sources for all 947 Iowa incorporated communities to study their relationships with the mean number of general dentists per 1,000 population per square mile (population density), the dependent variable. The authors used zero-inflated negative binomial models to examine the association between the dependent and predictor variables. RESULTS: Only 22.8% of communities had a dentist. Urban, young, well-educated, fluoridated communities with at least 1 elementary school had the highest estimated mean concentration of dentists. Isolated communities with older, less educated adults and lacking fluoridation and an elementary school had the fewest dentists. CONCLUSIONS: Although population is an important determinant for where a dentist practices, other variables such as urbanization, demographic characteristics, fluoridation status, and presence of at least 1 elementary school are also predictors of the number of dentists in a community. PRACTICAL IMPLICATIONS: These findings provide dental students and young practitioners useful information by highlighting community characteristics that are associated with office locations.

Four-year cost-utility analyses of sealed and nonsealed first permanent molars in Iowa Medicaid-enrolled children.

OBJECTIVES: Dental sealants, by their ability to prevent caries and maintain teeth in better health, have some inherent utility to individuals, programs, or society. This study assessed the 4-year incremental cost utility of sealing first permanent molars of 6-year-old Iowa Medicaid enrollees from a societal perspective and identified the group of teeth or children in whom sealants are most cost effective. METHODS: Dental services for first permanent molars were assessed using claims and encounter data for a group of continuously enrolled Medicaid enrollees who turned 6 between 1996 and 1999. Previously published utilities were used to weight the different health states. The weighted sum of outcomes [Quality-Adjusted Tooth-Years (QATYs)] was the measure of effectiveness. Costs and QATYs were discounted to the time of the child's sixth birthday. RESULTS: For all first molars, the cost of treatment associated with sealed teeth was higher but the utility was also slightly higher over the 4-year period. The relative incremental cost per 0.19 QATY ratio [changing the health state from a restored tooth (utility= 0.81) to a nonrestored tooth (utility = 1)] by sealing the molar ranged from $36.7 to $83.5 per 0.19 QATY. The incremental cost/QATY ratio was lower for sealing lower utilizers and for mandibular versus maxillary molars. CONCLUSIONS: Sealants improved overall utility of first permanent molars after 4 years. The 4-year cost/QATY ratio of sealing the first permanent molar varied by arch and type of utilizers. Sealing first permanent molars in lower dental utilizers is the most cost-effective approach for prioritizing limited resources.

Students' opinions about treating vulnerable populations immediately after completing community-based clinical experiences.

The purpose of this study was to analyze students' perceptions of comfort and anticipated willingness to treat selected special needs and traditionally underserved populations immediately upon completion of community-based clinical assignments. The sample consisted of University of Iowa senior dental students who completed a questionnaire that asked, in part, about student comfort with and future willingness to treat twelve vulnerable population groups. With student comfort and future willingness to treat each group as dependent variables, logistic models were developed to determine whether there were significant associations between dependent variables and gender, graduation year, and students' prior experience with these groups. Regression models indicate students' prior experience is most often associated with comfort in treating the associated population group. Likewise, experience and comfort add different dimensions to perceived future willingness to treat almost all of the twelve groups. Student gender, graduation year from dental school, and community assignments influence only a few of these targeted population groups. This study provides empirical evidence concerning students' perceptions about comfort with various vulnerable populations after completing their extramural rotations. Students were more comfortable treating certain population groups as well as more willing to consider including these groups in their future practices.

The Effects of Distance to Dentists and Dentist Supply on Children's Use of Dental Care.

OBJECTIVE: To examine the effects of distance to dentists and dentist supply on dental services use among children with Medicaid coverage in Iowa. DATA SOURCE: Iowa Medicaid claims for enrolled children between 2000 and 2009. STUDY DESIGN: The study sample included 41,554 children (providing 158,942 child-year observations) who were born in Iowa between 2000 and 2006 and enrolled from birth in the Iowa Medicaid program. Children were followed through 2009. We used logistic regression to simultaneously examine the effects of distance (miles to nearest dentist) and county-level dentist supply on a broad range of dental services controlling for key confounders. Additional models only used within-child variation over time to remove unobservable time-invariant confounders. PRINCIPAL FINDINGS: Distance was related to lower utilization of comprehensive dental exams (2 percent lower odds per 1 mile increase in distance), an effect that also held in models using within-child variation only. Dentist supply was positively related to comprehensive exams and other preventive services and negatively related to major dental treatments; however, these associations became smaller and insignificant when examining within-child changes except for other preventive services. CONCLUSIONS: Longer distance to dentists is a barrier for use of comprehensive dental exams, conditional on dentist supply.

The cost-effectiveness of large amalgam and crown restorations over a 10-year period.

OBJECTIVE: To assist clinical decision making for an individual patient or on a community level, this study was done to determine the differences in costs and effectiveness of large amalgams and crowns over 5 and 10 years when catastrophic subsequent treatment (root canal therapy or extraction) was the outcome. METHODS: Administrative data for patients seen at the University of Iowa, College of Dentistry for 1735 large amalgam and crown restorations in 1987 or 1988 were used. Annual costs and effectiveness values were calculated. Costs of initial treatment (large amalgam or crown), and future treatments were determined, averaged and discounted. The effectiveness measure was defined as the number of years a tooth remained in a state free of catastrophic subsequent treatment. Years free of catastrophic treatment were averaged, and discounted. The years free of catastrophic treatment accounted for individuals who dropped out or withdrew from the study. RESULTS: Teeth with crowns had higher effectiveness values at a much higher cost than teeth restored with large amalgams. The cost of an addition year free of catastrophic treatment for crowns was 1088.41 dollars at 5 years and 500.10 dollars at 10 years. Teeth in women had more favorable cost-effectiveness ratios than those in men, and teeth in the maxillary arch had more favorable cost-effectiveness ratios than teeth in the mandibular arch. CONCLUSIONS: Neither the large amalgam or crown restoration had both the lowest cost and the highest effectiveness. The higher incremental cost-effectiveness ratio for crowns should be considered when making treatment decisions between large amalgam and crown restorations.

General dentists' referrals of 3- to 5-year-old children to pediatric dentists.

BACKGROUND: Little is known about general dentists' referral patterns. The authors explored the practice, dentist and patient characteristics associated with general dentists' likelihood of referring children aged 3 to 5 years to pediatric dentists. METHODS: The authors sent all Iowa general dentists (N = 1,089) a 25-item questionnaire regarding the referral of children in their practices. The authors merged the resulting information with an existing database (Iowa Dentist Tracking System) to create the dataset. A total of 65.4 percent of the dentists (712) participated. RESULTS: Logistic regression analysis demonstrated that an increase in the percentage of children in the practice decreased the likelihood of the dentist's referring the children (odds ratio [OR] = 0.93, 95 percent confidence interval [CI] = 0.90 to 0.96). Practices with more than 5 percent of patients with public insurance were more likely to refer children (OR = 1.96, 95 percent CI = 1.26 to 3.06), as were dentists with additional training beyond dental school (OR = 1.69, 95 percent CI = 1.06 to 2.69). CONCLUSION: These data indicate that both practice and dentist characteristics are associated with the likelihood of making referals; however, there needs to be further study on general dentists' referral decisions. PRACTICE IMPLICATIONS: As the characteristics of the dental work force evolve, there is a need to study referral patterns and the influence they have on work force policy, patient accessibility and educational curriculum.

An assessment of cross-cultural education in U.S. dental schools.

The purpose of this study was to assess the status of cross-cultural education in U.S. dental schools and to identify characteristics associated with having a formal cross-cultural curriculum. An eighteen-item survey, which included questions about curricular format, teaching and evaluation methods, time, and course content, was sent to all U.S. dental schools. Comparisons were made using whether or not institutions had formal cross-cultural curricula. Forty-five of fifty-six schools responded. Twenty-nine schools reported having formal cross-cultural curricula in a separate course and/or integrated with other courses with specific goals and objectives. Schools that have formal cross-cultural curricula had higher scores on depth of curricula and spent more time than schools that reported having informal curricula (p=0.03). Competing curricular time and lack of faculty expertise were the most frequently cited impeding factors for inclusion of cross-cultural issues (87.8 percent and 68.3 percent, respectively), while diverse patient population and leadership commitment were the most frequently cited facilitating factors (92.5 percent and 67.5 percent, respectively). There is wide variation among dental schools regarding how they teach these issues and how students are evaluated. Dental schools lack guidance about how to best incorporate this curricular content.

Predictors of oral health counseling by WIC providers.

PURPOSE: The purpose of this study was to assess selected predictors for the inclusion of oral health counseling by Illinois Women, Infants, and Children (WIC) providers. METHODS: A questionnaire was developed and mailed to all 166 WIC sites to assess attitudes towards oral health counseling. Variables that revealed significant associations in bivariate analysis (P< or =.05) were considered as candidates for building a final logistic regression model in which frequency of oral health counseling was the outcome. RESULTS: A response rate of 76% was achieved after 1 mailing, with 27% of the WIC providers having some form of oral health training. There were no statistically significant differences in the frequency of WIC providers discussing oral health with their clients by age, gender, and level of education of the provider. In the final logistic regression analysis, variables significantly associated with the frequency of WIC providers' dicussing oral health with their clients were having: (1) oral health training; and (2) nursing training. CONCLUSIONS: The results suggest that Women, Infants, and Children (WIC) providers, who have had some oral health training, are more likely to provide counseling about dental disease and its prevention. This information was used to develop an educational tool for these nondental, health care providers.

An Interactive Website to Facilitate In-State Retention of New Dentists and Recruitment to Underserved Areas.

Some U.S. states have more difficulty than others in recruiting or retaining dentists. Part of the problem is that often dental students are not aware of opportunities across geographic regions of either their home state or the state where they were educated. With student input, the University of Iowa College of Dentistry and Dental Clinics designed and launched an interactive website that provides basic demographic, economic, and other meaningful information to help dental students locate potential practice locations and identify current employment opportunities in Iowa. Although this website is not a recruitment or retention panacea, it provides an easy method for dental students to explore all or parts of the state as they go about making one of the most important decisions of their careers. The website also provides a showcase for current practitioners and communities to demonstrate what they have to offer as practice opportunities.

Dental Visits by Age One: General Dentist Availability for Privately Insured Children in a Rural State.

PURPOSE: To evaluate the availability of general dentists who treat very young children with private insurance in the context of recommendations for age one dental visit. METHODS: Administrative data from Delta Dental of Iowa were analyzed to identify general dentists providing care to children younger than 18 years old in 2005 and 2012. Characteristics of dentists providing care to children younger than two years old were compared, examining changes over time. Geographical distribution of dentists who treated children younger than two years old was examined. RESULTS: The proportion of dentists treating children younger than two years old increased from six percent in 2005 to 18 percent in 2012. Younger dentists, females, graduates of The University of Iowa College of Dentistry, and those in metropolitan locations were significantly more likely to treat children younger than two years old. Fifty-one of 99 counties lacked any dentists who had provided care to privately insured children younger than two years old. CONCLUSIONS: The proportion of dentists in Iowa treating privately insured children younger than two years old has increased since 2005. However, relatively few general dentists provided care to very young children when compared to previous survey-based figures. Geographic distribution of providers supports the hypothesis that provider availability may pose a barrier to early dental visits.