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 .
Correlation between Microleakage and Absolute Marginal Discrepancy in Zirconia Crowns Cemented with Four Resin Luting Cements: An In Vitro Study
Objectives . To evaluate microleakage and absolute marginal discrepancy ( AMD ) and to assess correlation between AMD and microleakage with four resin luting cements . Material and Methods . 20 extracted human third molars were prepared for full-coverage crowns . 20 zirconia copings were made ( LAVA , 3 M ESPE ) and cemented . Specimens were r and omly allocated for each used type of cement into 4 groups , RelyX ® ( Rx ) , Multilink ® ( Mk ) , PANAVIA 2.1 ® ( P ) , and Maxcem ® ( Mx ) and immersed in 10 % safranin for 72 hours . 20x magnification lenses were used to observe microleakage areas ( μm2 ) and images software was used to measure AMD areas ( μm ) . Discrepancy and microleakage between the cements were compared with one-way ANOVA test with confidence interval of 95 % . Results . Rx Group showed microleakage has lowest value and AMD has highest value . P Group showed microleakage has the highest value and Mk Group presented AMD has lowest value . There were no significative differences between the cements . There were no linear correlations between microleakage and AMD ; however a complex regression statistical model obtained allowed formulating an association between both variables ( microleakage = AMD0,896 ) . Conclusions . No significative differences were found among 4 types of cements . No linear correlations between AMD and microleakage were found . Clinical Significance . AMD is not easily related to microleakage . Characteristics of cements are fundamental to decreasing of microleakage values
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 .