Which intraoral scanner produces the best fit?
December 08, 2016
The combination of using chamfer finish lines and older scanners could in part be a reason for less-than-optimal results when using computer-aided design and computer-aided manufacturing systems, according to the December issue of Professional Product Review.
"The benefits associated to newer scanners are supported by a clear improvement in the marginal adaptation of the tested crowns, regardless of the finish line," according to the report.
To find these results, the ADA Science Institute, in collaboration with the United States Air Force, evaluated the effect of three different finish line designs on the marginal adaptation of CAD/CAM crowns.
The researchers found that CEREC Omnicam (Dentsply Sirona, 2012) produced the best marginal fit across all three finish line designs. PlanScan (Planmeca, 2011) came next, followed by CEREC Bluecam (Dentsply Sirona, 2008), the oldest scanner tested.
"The results show that the newer systems allow more flexibility in restoration margin design and still produce acceptable marginal fit," said Dr. Sarrett, PPR editor. "For me, being able to use a margin design other than a shoulder offers a significant improvement."
The use of CAD/CAM technology in dentistry continues to replace the lost-wax technique, improving the manufacturing of indirect restorations, according to the article.
"Restorative dentistry is changing quickly due to technology advancements in imaging, milling, 3D printing and materials," said Dr. David Sarrett. "Soon nearly all indirect restorations will be produced by some or all of these technologies."
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The ADA Professional Product Review, or PPR, offers unbiased and scientifically sound reviews of dental products. The publication launched in 2006 under the ADA Council on Scientific Affairs. It aims to provide ADA members with product evaluation content compiled from the best available sources.