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2016 Issues of the ADA Professional Product Review

Volume 11, Issue 3: CAD/CAM Crowns (Lithium Disilicate): The Influence of the Finish Line and Intraoral Scanners on the Marginal Fit


Image of Dec 2016 PPR Abstract

Vol 11, Iss 3: Abstract PDF

Vol 11, Iss 3: Full Report PDF

The use of computer-aided design and computer-aided manufacturing (CAD/CAM) technology has continued to replace the lost-wax technique in dentistry. CAD/CAM systems utilize intraoral scanners to provide a fast and reliable means of collecting the measurements and data required for restorations, and mechanized manufacturing simplifies the labor intensive laboratory process. The learning curve for CAD/CAM systems can be a barrier to adoption, and is often dictated by the user's comfort with computer-based systems, and their willingness to adjust the tooth preparation in a way that favors the scanning/milling process. This product review from the Science Institute at the American Dental Association and the United States Air Force evaluates the effect of three different finish line designs on the marginal adaptation of CAD/CAM crowns using three different intraoral scanners: CEREC Bluecam (Dentsply Sirona), CEREC Omnicam (Dentsply Sirona) and Planmeca PlanScan (E4D Technologies).

Volume 11, Issue 2: Clinicians' Perspectives on Hearing Protection Devices

 Clinicians Perspective on Hearing Protection Devices Abstract Image Small

Vol 11, Iss 2: Abstract PDF

Vol 11, Iss 2: Full Report PDF



Occupational noise-induced hearing loss is estimated to be the most common occupational disability in the United States. Although noise exposure in the dental office is typically intermittent, dental professionals have been shown to be at risk of hearing loss, as the noise generated by some dental equipment can approach established exposure limits. In addition to hearing loss, high noise levels caused by some dental equipment can create stress, and can interfere with a dental professional’s communication and concentration. Wearing hearing protection devices (HPDs) is one way that dental professionals can reduce the harmful effects of office noise. This product review from the Science Institute at the American Dental Association and the United States Department of Veterans Affairs (VA) highlights valuable lab testing results and practitioner input on four brands of hearing protection devices.


Volume 11, Issue 1: Bisphenol A (BPA) Released from Resin Based Dental Sealants

Vol 11, Iss 1: Abstract PDF

Vol 11, Iss 1: Full Report PDF


 Dental sealants are used successfully to prevent occlusal caries. Modern dental sealants penetrate the pits and fissures present on the occlusal surface of molars, allowing dentists to avoid drilling into healthy enamel. Resin-based sealants composed of bisphenol A glycidyl methacrylate (bis-GMA) monomer use bisphenol A (BPA) during the manufacturing process. Although most manufacturers’ synthesis procedures minimize unreacted BPA, some traces of BPA will remain in most manufactured dental products. Oral exposure to the trace levels of BPA may be released from resin-based materials, and while previous studies conducted at the ADA indicate that the level of BPA released from resin-based materials is low and far below the limit proposed by EPA, this report contains BPA analysis for an additional 12 dental sealants in order to provide a more complete understanding of the current US market.