Micro-shear bond strength of different calcium silicate materials to bulk-fill composite

Abstract

Introduction This study aimed to compare the micro-shear bond strength (µSBS) performances of two resin-based calcium silicate-based cement (CSC) (TheraCal PT and TheraCal LC), Biodentine, and two modified-MTA CSC materials (NeoMTA 2 and BioMTA+) to bulk-fill restorative material. Materials and Methods Fifty 3D printed cylindrical resin blocks with a central hole were used (2 mm in depth and 4 mm in diameter). CSCs were placed in the holes (per each group n = 10) and incubated for 24 h. Cylindrical polyethylene molds (2 mm in height and diameter) were used to place the bulk-fill restorative materials on the CSCs and polymerize for 20 s. Then, all specimens were incubated for 24 h at 37 °C at a humidity of 100%. Specimen’s µSBSs were determined with a universal testing machine. Data were analyzed with one-way ANOVA (Welch) and Tamhane test. Results Statistically higher µSBS was found for TheraCal PT (29.91 ± 6.13 MPa) (p < 0.05) respect to all the other materials tested. TheraCal LC (20.23 ± 6.32 MPa) (p > 0.05) reported higher µSBS than NeoMTA 2 (11.49 ± 5.78 MPa) and BioMTA+ (6.45 ± 1.89 MPa) (p < 0.05). There was no statistical difference among TheraCal LC, NeoMTA 2 and Biodentine (15.23 ± 7.37 MPa) and between NeoMTA 2 and BioMTA+ (p > 0.05). Conclusion Choosing TheraCal PT as the pulp capping material may increase the adhesion and µSBS to the bulk-fill composite superstructure and sealing ability.

Evaluation of the Shear Bond Strength of Immediate and Delayed Restorations of Various Calcium Silicate-Based Materials with Fiber-Reinforced Composite Resin Materials

“…Similar to the present study, Falakolu et al observed that ThclPT had higher SBS values than NeoMTA2 [36]. Ozata et al noted that TheraCal LC, the successor to Theracal PT, had higher SBS values than NeoPUTTY and NeoMTA2, and they reported that this may be due to the chemical bond that ThclLC formed with the composite resin as a result of copolymerization [37].…”

Shear bond strength of calcium silicate-based cements to glass ionomers

“…A high bond strength between restorative materials and biomaterials is essential to minimize microleakage. It is generally considered that a bond strength ranging from to 17–20 MPa is required to achieve well-sealed restorations and sufficient resistance to contraction forces [ 32 ]. Based on the findings of this study, only the MMTA-EFHF group exhibited values higher than 17 MPa in the non-adhesive group.…”