[Optimizing the bond between metal and bonding agent in bonded restorations using a simplified silicoating procedure]

Area of Science:

• Dental Materials Science
• Biomaterials Engineering
• Prosthodontics

Context:

• Cobalt-chromium (Co-Cr) alloys are widely used in dental prosthetics.
• Ensuring durable resin bonding to metal alloys is crucial for restoration longevity.
• Existing bonding systems show variable performance under oral conditions.

Purpose:

• To evaluate the long-term tensile bond strength of resin-bonding systems to a Co-Cr alloy (Dentitan).
• To compare the stability of micromechanical versus mechanical-chemical bonding systems.
• To assess the efficacy of tribochemical silicoating (Rocatec) for Co-Cr alloys.

Summary:

• Five resin-bonding systems were tested for tensile bond strength to Dentitan Co-Cr alloy.
• Samples underwent aging in artificial saliva and thermocycling (150 days, 5-55°C).
• Mechanical-chemical systems maintained bond strength, unlike micromechanical systems, which showed degradation.

Impact:

• Mechanical-chemical bonding systems offer superior durability for resin-bonded restorations on Co-Cr alloys.
• Tribochemical silicoating (Rocatec) is a promising surface treatment for enhancing Co-Cr alloy bonding.
• Findings guide the selection of materials for more reliable and long-lasting dental restorations.