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Effect of cementation technique of individually formed fiber-reinforced composite post on bond strength and microleakage.

Makarewicz D, Le Bell-Rönnlöf AM, Lassila LV, Vallittu PK - Open Dent J (2013)

Bottom Line: The microleakage was measured using dye penetration depth under a stereomicroscope.Higher bond strength values (p<0.05) and less microleakage (p<0.05) were obtained with the "direct technique" compared to the "indirect technique".The "direct technique" seems to be beneficial when cementing individually formed FRC posts.

View Article: PubMed Central - PubMed

Affiliation: Department of Biomaterials Science, Institute of Dentistry and BioCity Turku Biomaterials Research Program, University of Turku, FI-20520, Turku, Finland.

ABSTRACT

Objectives: The aim of this study was to evaluate the effect of two different cementation techniques of individually formed E-glass fiber-reinforced composite (FRC) post on bond strength and microleakage.

Methods: The crowns of extracted third molars were removed and post preparation was carried out with parapost drills (diameter 1.5 mm). After application of bonding agents individually formed FRC posts (everStick POST, diameter 1.5 mm) were cemented into the post spaces with either ParaCem®Universal or self-adhesive RelyX™Unicem, using two different cementation techniques: 1) an "indirect (traditional) technique" where the post was prepolymerized prior application of luting cement and insertion into the post space or 2) a "direct technique" where the uncured post was inserted to the post space with luting cement and light-polymerized in situ at the same time. After water storage of 48 hours, the roots (n = 10/group) were cut into discs of thickness of 2 mm. A push-out force was applied until specimen fracture or loosening of the post. A microleakage test was carried out on roots which were not subjected to the loading test (n= 32) to evaluate the sealing capacity of the post-canal interface. The microleakage was measured using dye penetration depth under a stereomicroscope.

Results: Higher bond strength values (p<0.05) and less microleakage (p<0.05) were obtained with the "direct technique" compared to the "indirect technique". None of the FRC posts revealed any dye penetration between the post and the cement.

Conclusions: The "direct technique" seems to be beneficial when cementing individually formed FRC posts.

No MeSH data available.


Related in: MedlinePlus

Typical failure mode of the cemented posts after the push-out study: adhesive failure between cement and dentin of individuallyformed FRC post (everstick Post).D= Dentine, C= Cement, P= Post.
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Figure 3: Typical failure mode of the cemented posts after the push-out study: adhesive failure between cement and dentin of individuallyformed FRC post (everstick Post).D= Dentine, C= Cement, P= Post.

Mentions: In the assessment of the failure mode under a stereomicroscope it was found that none of the individually formed glass FRC posts showed adhesive failures between the post and the cement. The individually formed FRC posts in both groups (“direct” and “indirect” technique) failed mostly adhesively between the cement–dentin interface (Fig. 3). No difference in the failure types could be seen between the two groups.


Effect of cementation technique of individually formed fiber-reinforced composite post on bond strength and microleakage.

Makarewicz D, Le Bell-Rönnlöf AM, Lassila LV, Vallittu PK - Open Dent J (2013)

Typical failure mode of the cemented posts after the push-out study: adhesive failure between cement and dentin of individuallyformed FRC post (everstick Post).D= Dentine, C= Cement, P= Post.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3750973&req=5

Figure 3: Typical failure mode of the cemented posts after the push-out study: adhesive failure between cement and dentin of individuallyformed FRC post (everstick Post).D= Dentine, C= Cement, P= Post.
Mentions: In the assessment of the failure mode under a stereomicroscope it was found that none of the individually formed glass FRC posts showed adhesive failures between the post and the cement. The individually formed FRC posts in both groups (“direct” and “indirect” technique) failed mostly adhesively between the cement–dentin interface (Fig. 3). No difference in the failure types could be seen between the two groups.

Bottom Line: The microleakage was measured using dye penetration depth under a stereomicroscope.Higher bond strength values (p<0.05) and less microleakage (p<0.05) were obtained with the "direct technique" compared to the "indirect technique".The "direct technique" seems to be beneficial when cementing individually formed FRC posts.

View Article: PubMed Central - PubMed

Affiliation: Department of Biomaterials Science, Institute of Dentistry and BioCity Turku Biomaterials Research Program, University of Turku, FI-20520, Turku, Finland.

ABSTRACT

Objectives: The aim of this study was to evaluate the effect of two different cementation techniques of individually formed E-glass fiber-reinforced composite (FRC) post on bond strength and microleakage.

Methods: The crowns of extracted third molars were removed and post preparation was carried out with parapost drills (diameter 1.5 mm). After application of bonding agents individually formed FRC posts (everStick POST, diameter 1.5 mm) were cemented into the post spaces with either ParaCem®Universal or self-adhesive RelyX™Unicem, using two different cementation techniques: 1) an "indirect (traditional) technique" where the post was prepolymerized prior application of luting cement and insertion into the post space or 2) a "direct technique" where the uncured post was inserted to the post space with luting cement and light-polymerized in situ at the same time. After water storage of 48 hours, the roots (n = 10/group) were cut into discs of thickness of 2 mm. A push-out force was applied until specimen fracture or loosening of the post. A microleakage test was carried out on roots which were not subjected to the loading test (n= 32) to evaluate the sealing capacity of the post-canal interface. The microleakage was measured using dye penetration depth under a stereomicroscope.

Results: Higher bond strength values (p<0.05) and less microleakage (p<0.05) were obtained with the "direct technique" compared to the "indirect technique". None of the FRC posts revealed any dye penetration between the post and the cement.

Conclusions: The "direct technique" seems to be beneficial when cementing individually formed FRC posts.

No MeSH data available.


Related in: MedlinePlus