الفهرس 
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Abstract
This study evaluated the effect of three different surface treatments on the bond strength of ready-made glass fiber post and custom made pressable e-max post. The bond strength was evaluated by push out test.
Forty freshly extracted single rooted upper central incisor teeth were selected. All root canals were endodontic treatment according to standard procedure then divided into two main groups (20 samples each) according to the type of posts were used. The first group (G) was restored with ready-made glass fiber post (Glassix plus radiopaque) (n=20), The second group (P) was restored with custom made pressable ceramic (E-max press post) (n=20) (Ivoclar Vivadent).Each group was subdivided to four subgroups ( 5 samples each ) according to the type of surface treatment done: subgroup C: no surface treatment (control), Subgroup SB: sandblasting with 50 µm Aluminum-oxide (AL2O3) particles, subgroup SC: sandblasting in conjunction with silica coating particles then silane coating and subgroup E: etching with 9.5% hydrofluoric acid then silane coupling agent.
All samples were sectioned by IsoMet 4000 microsaw (Buehler,USA) into 3sections (2mm each thickness) from coronal to apical then subjected to push-out test by universal test machine.
Data were collected, tabulated and statistically analyzed with the following conclusions:
Silica coating then silanization of ceramic e-max post is the best surface treatment increase bond strength
(2) Etching with hydrofluoric acid then silanization of glass fiber post is the best surface treatment increase bond strength
(3) Bond strength of glass fiber post was higher than bond trength of ceramic emax post
Clinical recommendations:
The selection of post surface treatment depends on the type of post:
In case of e-max post, the surface treatment of choice is silica coating then silanization.
In case of glass fiber post, the surface treatment of choice is etching using hydrofluoric acid then silanization.