monoblock

The term monoblock, literally meaning a single unit,

Primary monoblock.- A primary monoblock has only one interface that extends circumferentially between the material and the root canal wall. Ex - hydron and MTA obturation

Secondary Monoblocks

Secondary monoblocks are those that have two circumferential interfaces, one between the cement and dentin and the other between the cement and the core material. Ex – post luting and conventional sealer ,gutta percha obturation

Tertiary Monoblocks

Tertiary monoblocks are those in which a third circumferential interface is introduced between the bonding substrate and the abutment material. Ex  -  Activ Gp  , which has an external Gic coating.

                                                                                     

                                                                                REF: JOE,2007,33,(4).