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Comments sought on CAD/CAM-related report

November 29, 2017 Dental professionals can review and comment on a proposed ADA-developed technical report that offers guidance on the cementation and bonding of computer-aided design/computer-aided manufacturing fabricated restorations.

CAD/CAM technology has advanced to become the primary fabrication method for many types of restorations, according to the Standards Committee on Dental Products’ proposed report. A wide variety of materials, such as metals, ceramics, composites and hybrid ceramics, can be digitally fabricated into a large range of indications from inlays, onlays and single unit crowns to multi-unit fixed partial dentures.

While CAD/CAM technology has demonstrated great promise with regards to restoration fidelity and accuracy, there remains a need to cement and/or bond the restorations, according to the proposed report. Ultimately their clinical success depends on this step in the procedure being repeatable and reliable. Failure to properly select and use cements can lead to clinical problems such as loss of the restoration (debonding), increased sensitivity and recurrent decay, according to the report.

This technical report available for review, ADA Technical Report No. 143 For Guidance for Cementation and Bonding of CAD/CAM Fabricated Restorations, outlines the principles behind the mechanisms of adhesion to the most common computer-aided design/computer-aided manufacturing restorations and protocols for successful clinical cementation/bonding.

The draft document is available for review and comment by calling the ADA toll-free number, ext. 2506, or by e-mailing