The available evidence indicated that the coronal region of the root canal bonded better to the glass fiber post  than apical regions .
Phosphoric acid , hydrogen peroxide , and silane application enhance post ’s retentiveness .
In light of the current evidence , surface treatment strategies increase the bond strength of glass fiber post to dentine .
However , recommendations for st and ardized testing methods and reporting of future clinical studies are required to maintain clinical ly relevant information and to underst and the effects of various surface treatment of glass fiber post  and their bond strength with dentine walls of the root canal
The objective of this systematic review was to determine the influence of surface treatment of glass fiber posts  on bond strength to dentine .
Randomized clinical trial comparing the effects of post placement on failure rate of postendodontic restorations: preliminary results of a mean period of 32 months.
INTRODUCTION The aim of this r and omized clinical trial was to assess whether the placement of a fiber post ( DT Light Post ) ( DT ) and the amount of residual coronal dentin affect the time to failure of single-unit postendodontic restorations . METHODS Ninety patients providing 120 teeth were selected . Three groups ( n = 40 ) were defined on the basis of the amount of residual coronal dentin : 2-walls group , 2 or more coronal walls ; 1-wall group , 1 coronal wall ; no-wall group , no wall exceeding 2 mm above the gingival level . Within each group teeth were r and omized and allocated to 2 intervention groups ( n = 20 ) , including subgroups no post ( no root canal retention ) and subgroups post ( placement of DT ) . RESULTS After a mean observation period of 32.4 ( 13.7 ) months in subgroups no post , the failure rates were 10 % , whereas in subgroups post , failure rates of 7 % were observed ( P = .318 ) . In no-wall group post placement significantly affected the time to failure of total restorations ( P = .029 , log-rank test ) . Teeth without post retention revealed a significantly higher failure rate ( 31 % ) compared with teeth restored with post retention ( 7 % ) . CONCLUSIONS Within the observation time of the present study , fiber post placement was efficacious to reduce failures of postendodontic restorations only with teeth that exhibited no coronal walls . Post insertion for teeth showing a minor substance loss should be critically reconsidered
The available evidence indicated that the coronal region of the root canal bonded better to the glass fiber post  than apical regions .
Phosphoric acid , hydrogen peroxide , and silane application enhance post ’s retentiveness .
In light of the current evidence , surface treatment strategies increase the bond strength of glass fiber post to dentine .
However , recommendations for st and ardized testing methods and reporting of future clinical studies are required to maintain clinical ly relevant information and to underst and the effects of various surface treatment of glass fiber post  and their bond strength with dentine walls of the root canal
The objective of this systematic review was to determine the influence of surface treatment of glass fiber posts  on bond strength to dentine .