Shear Bond Comparison between 4 Bioceramic Materials and Dual-cure Composite Resin

Area of Science:

• Biomaterials Science
• Dental Materials Science
• Regenerative Dentistry

Background:

• Bioceramic materials offer favorable biologic and physical properties for regenerative treatments.
• Adequate restoration is crucial to prevent microleakage in regenerative procedures.
• Limited research exists on the bond strength between restorative and bioceramic materials.

Purpose of the Study:

• To compare the shear bond strength between four different bioceramic materials and a dual-cure composite resin.
• To evaluate the performance of White ProRoot MTA, Biodentine, EndoSequence Root Repair Material Fast Set Putty, and NeoMTA in conjunction with a composite resin restoration.

Main Methods:

• Eighty Teflon blocks were filled with four bioceramic materials: White ProRoot MTA, Biodentine, EndoSequence Root Repair Material Fast Set Putty, and NeoMTA.
• Samples were restored with ClearFil SE Bond and ClearFil DC Core Plus after setting.
• Shear bond strength was tested using a universal testing machine, recording peak force and calculating MPa.

Main Results:

• Mean shear bond strengths were: White ProRoot MTA (7.96 MPa), Biodentine (9.18 MPa), EndoSequence Root Repair Material Fast Set Putty (4.47 MPa), and NeoMTA (5.72 MPa).
• White ProRoot MTA and Biodentine exhibited statistically similar, higher bond strengths compared to NeoMTA.
• NeoMTA showed a statistically greater bond strength than EndoSequence Root Repair Material Fast Set Putty; all values were lower than typical dentin-composite resin bond strengths.

Conclusions:

• The selection of bioceramic materials for regenerative procedures should not solely depend on the bond strength with the overlying coronal resin restoration.
• Other factors, such as biologic properties and handling characteristics, may be more critical in material selection.
• Further research may be needed to understand the long-term clinical implications of these bond strengths.