Selective-etch adhesive bonding metal onlay before and after
February 8, 2022
Dr. Akit Patel, BDS, MFDS RCS, MClinDent (Pros), MRD RCS

Clinical Case: Selective-etch Adhesive Bonding of a Metal Onlay

Selective-etch adhesive technique using 3M™ RelyX™ Universal Resin Cement and 3M™ Scotchbond™ Universal Plus Adhesive.

About the Case

A 68 year old patient presented with severe wear on tooth 36. The tooth was conservatively prepared for a non-precious metal adhesive onlay to protect the exposed dentin and restore occlusal function. The onlay was pre-treated by sandblasting and in this case the optional priming of metal with 3M™ Scotchbond™ Universal Plus Adhesive was done. For the cementation 3M™ RelyX™ Universal Resin Cement and Scotchbond Universal Plus Adhesive were used in the selective-etch adhesive technique.

Initial situation

Initial situation.

Preparation

Preparation.

Sandblasting of metal onlay bonding surface

Sandblasting of metal onlay bonding surface.

Air thinning

Air thinning.

Selective enamel etching

Selective enamel etch with 3M™ Scotchbond™ Universal Etchant after cleaning of prep with 50µm alumina.

After application and air thinning of adhesive

After application and air thinning of 3M™ Scotchbond™ Universal Plus Adhesive. No light-cure.

Excess cement clean-up

Excess cement clean-up.

Final result

Final result.

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