Article 1: Tuberculosis Epidemiology, Diagnosis and Infection Control Recommendations for Dental Settings: An Update on the Centers for Disease Control and Prevention Guidelines 

1. Approximately what proportion of the world population is estimated to be infected with Mycobacterium tuberculosis (TB) at this time?
Select answer A. about one-tenth B. about one-fourth C. about one-third D. about one-half

2. Which one of the following statements about the blood assay for TB is not correct?
Select answer A. It requires only one patient visit. B. Results are not available for 72 hours. C. It does not boost responses on subsequent tests. D. It is not affected by prior bacille Calmette-Guérin (BCG) vaccination.

3. What is believed to be the level of TB transmission risk in most dental settings within the United States?
Select answer A. none B. low C. medium D. potential for ongoing transmission

4. Which one of the following statements about infection control measures is not correct?
Select answer A. Surgical masks are highly effective in preventing inhalation of small microorganisms. B. Facepiece respirators effectively filter particles with diameters of 0.3 micrometers. C. TB is not believed to be acquired from contact with environmental surfaces. D. A disinfectant labeled as tuberculocidal will inactivate a broad spectrum of pathogens.

Article 2: A Double-blind Randomized Controlled Clinical Trial of 10 Percent Versus 16 Percent Carbamide Peroxide Tooth-Bleaching Agents: One-Year Follow-up 

1. One year after bleaching, which spectrophotometer color parameter changed significantly for both treatment groups?
Select answer A. measure of lightness or darkness B. measure of redness or greenness C. measure of yellowness or blueness D. total color difference or distance between two colors

2. How many spectrophotometer ΔE units lighter did the teeth in both treatment groups remain at one year after bleaching, compared with baseline?
Select answer A. more than 1.4 units B. more than 2.8 units C. more than 3.2 units D. more than 4.0 units

3. How many visual shade guide units lighter did the teeth in both treatment groups remain at one year after bleaching, compared with baseline?
Select answer A. at least 2.9 units B. at least 3.6 units C. at least 4.5 units D. at least 5.7 units

4. One year after bleaching, what proportion of participants in both treatment groups reported consuming staining beverages two or three times per day?
Select answer A. none B. about one-fourth C. about one-third D. about one-half

Article 3: Retention of Metal-Ceramic Crowns With Contemporary Dental Cements 

1. In cement study A, which one of the following cements was associated with the highest amount of force needed for crown removal?
Select answer A. Fuji Plus resin-modified glass ionomer cement (GC America, Alsip, Ill.) B. RelyX Unicem self-adhesive modified-resin cement (3M ESPE, St. Paul, Minn.) C. Panavia resin-modified glass ionomer cement (Kuraray America, New York City) D. RelyX Luting resin-modified glass ionomer cement (3M ESPE)

2. Which one of the following statements correctly summarizes the crown-removal force findings for powder-liquid versus paste-paste versions of RelyX Luting cement?
Select answer A. The powder-liquid version required about three times as much force. B. The powder-liquid version required about twice as much force. C. The powder-liquid version required about the same amount of force. D. The powder-liquid version required about one-half as much force.

3. In cement study C, which one of the following cements was most retentive?
Select answer A. zinc phosphate cement B. iCEM self-adhesive modified-resin cement (Heraeus Kulzer, Armonk, N.Y.) C. RelyX Unicem Clicker self-adhesive modified-resin cement (3M ESPE) D. Maxcem self-adhesive modified-resin cement (Kerr, Orange, Calif.)

4. Of all the cements tested in studies A, B and C, which one required the least amount of force for crown removal?
Select answer A. RelyX Luting resin-modified glass ionomer cement B. Panavia resin-modified glass ionomer cement C. zinc phosphate cement D. Fuji Plus resin-modified glass ionomer cement

Article 4: The Effect of Salivary Factors on Dental Erosion in Various Age Groups and Tooth Surfaces 

1. Across all age groups, what surface most commonly was found to be eroded among participants in this study?
Select answer A. facial B. lingual C. occlusal D. proximal

2. For participants aged 16 through 20 years, which one of the following differed significantly between those with no erosion and those with erosion into enamel?
Select answer A. unstimulated buffering capacity B. stimulated salivary flow rate C. stimulated total protein concentration D. titratable acidity (volume of stimulated saliva needed to neutralize orange juice)

3. For participants aged 26 through 30 years, which one of the following differed significantly between those with erosion into enamel only and those with erosion into dentin?
Select answer A. unstimulated buffering capacity B. unstimulated urea concentration C. stimulated total protein concentration D. titratable acidity (volume of stimulated saliva needed to neutralize orange juice)

4. For participants aged 46 through 50 years, which one of the following differed significantly between those with no erosion and those with erosion into enamel?
Select answer A. unstimulated buffering capacity B. stimulated salivary flow rate C. stimulated total protein concentration D. titratable acidity (volume of stimulated saliva needed to neutralize orange juice)

To submit your test answers, click the "Submit" button below. The JADA CE payment screen on the University of Colorado Health Sciences Center Web site will open in a new window. Following payment, confirmation of the credits you've earned will be displayed for printing. An additional confirmation will be sent by e-mail and postal mail.

Please note, you will not have the opportunity to revise your answers once you've submitted the test.