January 2013 JADA CE Test

Article 1: Results from the Xylitol for Adult Caries trial (X-ACT)

1. Each of the following was an inclusion criterion for this study's sample of participants except which one?
Select answer A. age 21 to 80 years B. no carious lesions present or self-reported within one year C. presence of 12 or more teeth D. no periodontal disease requiring aggressive treatment

2. For the xylitol group compared with the placebo group, what was the percentage reduction in the average number of surfaces with cavitated lesions or restorations per year, the annualized crude count of a person's cumulative decayed or filled surface (D₂FS) increment?
Select answer A. 10 percent B. 15 percent C. 20 percent D. 25 percent

3. In the full regression model, which one of the following was associated with significant increases in annualized D₂FS scores?
Select answer A. age B. history of routine dental visits C. baseline D2FS score D. over-the-counter fluoride use

4. For participants with baseline D₂FS scores of 21 or greater (participants with greater caries experience), what was the rate ratio for D₂FS among those in the xylitol group?
Select answer A. 0.40 B. 0.80 C. 1.20 D. 1.60

Article 2: Intraoral treatment of veneering porcelain chipping of fixed dental restorations: A review and clinical application

1. Each of the following is considered a potential reason for failure of veneering porcelain except which one?
Select answer A. lower coefficient of thermal expansion for veneer than for core materials B. low thermal conductivity of zirconia C. use of standard thickness copings D. hand-layering of veneering porcelain

2. Which one of the following materials can be etched effectively with hydrofluoric acid?
Select answer A. oxide ceramics B. silicate ceramics C. base alloys D. noble alloys

3. What level of pressure do the authors recommend for air abrasion to effectively prepare oxide-ceramic materials without compromising bond strength?
Select answer A. 3.5 bar B. 2.5 bar C. 1.5 bar D. 0.5 bar

4. In a study of repairs to porcelain-fused-to-metal restorations using tribochemical coating technology, what was the overall survival rate for the repaired restorations after 34 months of observation?
Select answer A. 94 percent B. 89 percent C. 76 percent D. 61 percent

Article 3: Electronic dental record use and clinical information management patterns among practitioner-investigators in The Dental Practice-Based Research Network

1. What percentage of U.S. solo practitioners who responded to the survey reported using computers to manage clinical information?
Select answer A. 73.8 percent B. 64.1 percent C. 50.7 percent D. 44.4 percent

2. Which one of the following electronic dental record systems was reported to be in use by the largest percentage of responding group practices in the United States that were not affiliated with larger practice networks?
Select answer A. PracticeWorks (Carestream, Atlanta) B. Eaglesoft (Patterson, St. Paul. Minn.) C. Dentrix (Henry Schein, Melville, N.Y.) D. SoftDent (Carestream)

3. In which subgroup of practices did the largest percentage of respondents report being completely paperless?
Select answer A. group practices in the United States B. solo practices in the United States C. Scandinavian group practices D. Scandinavian solo practices

4. Which category of information was stored on computers most frequently by solo practices in the United States?
Select answer A. extraoral images B. appointments C. chief complaints D. treatment plans

Article 4: The dentist's role in promoting community water fluoridation: a call to action for dentists and educators

1. In 2008, approximately what percentage of the total population of the United States had access to fluoridated water?
Select answer A. 89 percent B. 76 percent C. 64 percent D. 55 percent

2. What percentage of U.S. adults responding to a 2009 survey knew the purpose of community water fluoridation?
Select answer A. 73 percent B. 68 percent C. 57 percent D. 48 percent

3. What percentage of communities in Nebraska holding public referenda on water fluoridation during 2008 voted in favor of the policy?
Select answer A. 80 percent B. 60 percent C. 40 percent D. 20 percent

4. What percentage of Canadian adults responding to a survey reported that they received information about water fluoridation from their dentists?
Select answer A. 41 percent B. 28 percent C. 13 percent D. 2 percent

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