One-bottle silane coupling agent containing 4-META.

Area of Science:

• Materials Science
• Biomaterials Engineering
• Dental Materials

Background:

• Silane coupling agents are crucial for bonding dental ceramics to resin composites.
• Optimizing silane formulations is essential for enhancing the durability and longevity of dental restorations.
• Current commercial agents may have limitations in achieving optimal bond strengths.

Purpose of the Study:

• To evaluate the effectiveness of commercial and experimental silane coupling agents.
• To compare the shear bond strengths of different silane formulations when bonding ceramic disks.
• To identify optimal compositions for experimental one-bottle silane coupling agents.

Main Methods:

• Experimental one-bottle silane coupling agents were synthesized using 3-methacryloxypropyltrimethoxysilane (3-MPTS) and 4-methacryloxyethyl isocyanate (4-META) with resin monomers.
• Ceramic disks (IPS e-max) were treated with silane coupling agents and bonded using a commercial flowable resin composite (Clearfil Majesty LV).
• Shear bond strengths were measured to quantify the bonding effectiveness of the tested agents.

Main Results:

• A commercial silane coupling agent modified with 4-META demonstrated significantly higher bond strength than the unmodified version.
• Two experimental one-bottle silane coupling agents, containing 5% 4-META, 45% 3-MPTS, and 50% resin monomers, achieved the highest statistically significant bond strengths.
• These experimental formulations outperformed both the unmodified commercial agent and the modified commercial agent.

Conclusions:

• Experimental silane coupling agents, particularly those with specific 4-META and 3-MPTS compositions, offer superior bonding performance to ceramic materials.
• The addition of 4-META to commercial silane coupling agents can enhance their effectiveness.
• These findings suggest potential for improved dental restorative material bonding through optimized silane chemistry.