According to this review , the 3-step adhesive systems were the best performing and still are the gold st and ard for the cementing of indirect restorations .
In addition , it can be concluded that self-etched adhesive systems reduce the time spent in clinical practice , however at the interface level they behave as permeable membranes more susceptible to degradation
New technologies are changing the therapeutical options to do indirect restorations and new adhesive systems are continuously introduced to be used by clinicians .
Different interactions between restorations , adhesive systems components , enamel and dentin require having criteria based on the selection of the adhesive system , ensuring the longevity of the restorations and the preservation of the biological remnant .
The adhesion force to the dental tissue is one of the indicatives of the behavior of the adhesive systems and influences the behavior of the treatments with direct and indirect restorations .
The objective of this search was to find the adhesive systems with the best results in terms of the adhesion strength of indirect restorations  on the dental tissues .
Fracture resistance and deflection of pulpless anterior teeth restored with composite or porcelain veneers.
INTRODUCTION The aim of this in vitro study was to evaluate the influence that resin composite and porcelain veneer restorations , associated or not to fiber post placement , have on fracture resistance and deflection of pulpless anterior teeth .  METHODS One hundred twenty freshly extracted human maxillary central incisors were selected . Teeth were r and omly divided into 7 experimental groups ( veneer preparation/resin composite veneer placement/endodontic therapy and resin composite veneer placement/endodontic therapy , fiber post and resin composite veneer placement/porcelain veneer placement/endodontic therapy and porcelain veneer placement/endodontic therapy , fiber post and porcelain veneer placement ) and a control group ( n = 15 ) . Specimens were loaded to fracture recording crown deflection , and data were statistically analyzed . RESULTS Veneer preparations did not significantly influence fracture resistance of incisors . On the contrary , veneer preparation significantly increased specimen deflection values .  Fiber posts seemed to significantly increase mean maximum load values for endodontically treated teeth restored with either composite or porcelain veneers . CONCLUSIONS A fiber post restoration can be suggested when endodontic treatment is associated with veneer restoration . Veneer restorations seem to be an optimal choice also for endodontically treated teeth
According to this review , the 3-step adhesive systems were the best performing and still are the gold st and ard for the cementing of indirect restorations .
In addition , it can be concluded that self-etched adhesive systems reduce the time spent in clinical practice , however at the interface level they behave as permeable membranes more susceptible to degradation
New technologies are changing the therapeutical options to do indirect restorations and new adhesive systems are continuously introduced to be used by clinicians .
Different interactions between restorations , adhesive systems components , enamel and dentin require having criteria based on the selection of the adhesive system , ensuring the longevity of the restorations and the preservation of the biological remnant .
The adhesion force to the dental tissue is one of the indicatives of the behavior of the adhesive systems and influences the behavior of the treatments with direct and indirect restorations .
The objective of this search was to find the adhesive systems with the best results in terms of the adhesion strength of indirect restorations  on the dental tissues .