The guidelines of modern restorative dentistry are adhesion and minimum invasiveness.

Composite and ceramic materials are now leading on the market as a permanent and universal restoration solution: there is no treatment planning which does not include the use of composite or ceramic materials as for sealing, anterior or posterior restoration or prosthetic crown support.

The perfect knowledge of the advantages and limits of adhesives in relation to the substrates is fundamental for clinicians: a superficial approach to use bonding may lead to failure and very long chair-work times.

Through clinical cases, simple and predictable strategies in the use of adhesives in relation to the substrates will be indicated.