Article 1: Bisphenol A and other compounds in human saliva and urine associated with the placement of composite restorations
1. For all patients, each of the following compounds was observed at significantly higher salivary concentrations during the first hour after treatment except which one?
A. bisphenol A (BPA)
B. triethylene glycol dimethacrylate (TEGDMA)
C. bisphenol A diglycidyl ether (BADGE)
D. bisphenol A-glycidyl methacrylate (bis-GMA)
2. During the first hour after treatment, for which one of the following compounds was the greatest difference in salivary concentration observed when restorations placed with and without a rubber dam were compared?
3. Which one of the following compounds was observed to have the greatest increase in urine concentration during the first hour after treatment?
B. BPA and bis (2,3-hydroxyphenyl) ether
D. bisphenol A dimethacrylate
4. By what approximate percentage did concentrations of BPA in urine that were measured nine to 30 hours after treatment exceed pretreatment levels?
A. 40 percent
B. 30 percent
C. 20 percent
D. 10 percent
Article 2: The effects of internal tooth bleaching regimens on composite-to-composite bond strength
1. Compared with control group C1 (no calcium hydroxide), which one of the following treatment groups was observed to have the greatest mean shear bond strength?
A. sodium perborate/distilled water (group SP/W)
B. sodium perborate/3 percent hydrogen peroxide (group SP/HP-3)
C. sodium perborate/30 percent hydrogen peroxide (group SP/HP-30)
D. 35 percent hydrogen peroxide (group HP-35)
2. How much lower was mean shear bond strength for group HP-35 compared with that for group SP/W?
A. 20.5 percent lower
B. 16.1 percent lower
C. 9.3 percent lower
D. 2.7 percent lower
3. Which one of the following groups had the highest mean surface roughness score?
A. control group C1
B. group SP/W
C. group SP/HP-30
D. group HP-35
4. Which one of the following groups had the lowest mean surface roughness score?
A. control group C2 (calcium hydroxide)
B. group SP/HP-3
C. group SP/HP-30
D. group HP-35
Article 3: The limitations of the clinical oral examination in detecting dysplastic oral lesions and oral squamous cell carcinoma
1. Approximately what proportion of oral squamous cell carcinomas (OSCCs) are diagnosed at the advanced stages III or IV of the disease?
A. about one in 10
B. about one-third
C. about one-half
D. about two-thirds
2. To assess the effectiveness of the clinical oral examination (COE) in correctly identifying oral mucosal dysplasia or OSCC, what level of sensitivity did the authors calculate?
3. To assess the effectiveness of the COE in correctly ruling out oral mucosal dysplasia or OSCC, what level of specificity did the authors calculate?
4. What was the overall diagnostic odds ratio for the COE in identifying these conditions?
Article 4: The prevalence of questionable occlusal caries: findings from The Dental Practice-Based Research Network
1. What percentage of patients in this study's sample were observed to have one or more instances of questionable occlusal caries (QOC)?
A. 44.7 percent
B. 33.5 percent
C. 27.2 percent
D. 19.1 percent
2. What percentage of unrestored occlusal surfaces was identified as having QOC?
A. 16.9 percent
B. 11.1 percent
C. 8.8 percent
D. 5.2 percent
3. Which of this study's regions accounted for the greatest percentage of unrestored surfaces with QOC?
D. Permanente Dental Associates in Oregon/Washington
4. In a previous study cited by these authors, what percentage of QOC had progressed into dentin by the end of a two-year observation period?
A. 63 percent
B. 48 percent
C. 29 percent
D. 16 percent
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