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Cementation is a key factor for clinical success. Given the variety of available CAD/CAM materials, specific procedures are needed.

All restorations were in a range where clinical application seems not restricted, but insertion of a screw channel might reduce stability of individual materials.

Successful bonding on PEEK surfaces can be achieved by surface roughening and subsequent surface activation with acetone- or phosphate-based methacrylate primers or tribochemical treatment.