Enhanced resin titanium adhesion with silane primers using tribochemical silica-coating

Area of Science:

• Biomaterials Science
• Dental Materials
• Surface Chemistry

Background:

• Titanium is widely used in dental and orthopedic implants.
• Achieving durable resin-titanium bonds is crucial for implant longevity.
• Existing bonding agents may require optimization for enhanced adhesion to titanium surfaces.

Purpose of the Study:

• To evaluate the effectiveness of experimental silane primers in improving resin-titanium bonding.
• To compare the shear bond strength of different silane primer formulations and resin systems.
• To assess the effect of artificial aging on the bond strength of resin-titanium interfaces.

Main Methods:

• Commercially pure titanium coupons were treated with various experimental silane primers and bonded with urethane dimethacrylate resins.
• Specimens were divided into six groups based on primer and resin combinations.
• Bonded specimens underwent artificial aging via thermo-cycling (6,000 and 12,000 cycles) after initial storage.

Main Results:

• The experimental resin combined with 1.0 vol% 3-acryloxypropyltrimethoxysilane (group-AE) showed the highest initial shear bond strength (26.2±4.0 MPa).
• After 12,000 thermo-cycles, the combination of 1.0 vol% 3-acryloxypropyltrimethoxysilane and 0.5 vol% bis-(1,2-triethoxysilyl)ethane with Multilink® Speed (group-BM) exhibited the highest adhesion strength (13.4±3.2 MPa).

Conclusions:

• The experimental silane primer containing 3-acryloxypropyltrimethoxysilane and bis-(1,2-triethoxysilyl)ethane demonstrates potential for enhancing long-term resin-titanium adhesion.
• Optimized silane primer formulations can significantly improve the durability of resin-titanium bonds under challenging environmental conditions.
• Further research into silane chemistry is warranted for developing advanced dental and biomedical adhesive systems.