Βιβλιοθήκη Οδοντιατρικής
Κατεύθυνση Οδοντική Χειρουργική (Κλινικές Ειδικεύσεις)

2020-02-03

2019

Vasilopoulos Nektarios - Nikolaos

Μασούρας Κωνσταντίνος, Επίκουρος Καθηγητής, Τμήμα Οδοντιατρικής, Σχολή Επιστημών Υγείας, ΕΚΠΑ
Αναγνώστου Μαρία, Επίκουρη Καθηγήτρια, Τμήμα Οδοντιατρικής, Σχολή Επιστημών Υγείας, ΕΚΠΑ
Αρτοπούλου Ιόλη , Επίκουρη Καθηγήτρια, Τμήμα Οδοντιατρικής, Σχολή Επιστημών Υγείας, ΕΚΠΑ

Εργαστηριακή μελέτη της αντοχής δεσμού στη διάτμηση έμμεσων αποκαταστάσεων σύνθετης ρητίνης και οδοντίνης, ύστερα από άμεση κάλυψη οδοντίνης

Greek

Laboratory study of shear bond strength of indirect resin - composite restorations to human dentin, using the immediate dentin sealing technique

Introduction: The Immediate Dentin Sealing technique using adhesive systems, with or without a thin layer of resin is an alternative way of treating the freshly prepared dentin immediately after tooth preparation for ceramic, as well as for resin-composite indirect restorations.
Purpose: The aim of this dissertation was to compare the shear bond strength of resin-composite restorations to dentin, after cementation either with the cοnventional technique or the application of Immediate Dentin Sealing (IDS), as well as to observe the stability of the bond strength over time.

Materials and Methods: 39 sound, extracted premolars and molars were used in this study. The specimens were randomly divided into three groups. In the 1st group (control group) the samples were immediately restored with resin-composite and stored in distilled water for a day, at 37oC. Subsequently the specimens were submitted to shear bond strength testing. In the second group the Immediate Dentin Sealing technique was applied. Following a 7-days storage under the previous conditions the final indirect restorations were cemented. Just before cementation the adhesive systems surface was air-abraded. Then, a new amount of adhesive system was applied and the final restoration was cemented, using a dual-cure resin cement. 24-hours later the specimens were submitted to shear bond strength testing. Finally in the third group, the same steps as in group 2 were followed, except that a provisional restoration was placed (Telio CS Onlay/Ivoclar Vivadent). The adhesive system used was OptiBond ™ XTR (Kerr), a two-step self-etch adhesive system. Herculite™ XRV (Kerr), a micro-hybrid resin-composite and NX3-XTR (Kerr), a dual-cure resin cement, were the rest of the materials used.
Results: The Immediate Dentin Sealing group displayed the highest mean bond strength, while the control group (immediate restoration) the lowest. However, the median values in all groups were similar, ranging between 6.73 and 7.1 MPa. Consequently, according to the results of the Kruskal-Wallis test, there were no statistically significant differences in mean bond strengths among the 3 groups (Kruskal-Wallis: 0.929, p <0.629).

Conclusion: Applying the Immediate Dentin Sealing technique, whether using provisional restorations or not, yields high shear bond strengths equivalent to direct restorations, which is supports its application.

Health Sciences

Immediate dentin sealing, Adhesion, Adhesive systems, Bond strength, Shear, Sandblast

No

0

Yes

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https://pergamos.lib.uoa.gr/uoa/dl/object/2896108