In Vitro Enhanced Bonding of Silane-Modified Adhesive Systems in Fiber Post Cementation

Area of Science:

• Dental Materials Science
• Biomaterials Engineering
• Adhesive Dentistry

Background:

• Fiber posts are widely used in dental restorations.
• The silane coupling agent is crucial for enhancing the bond between the resin cement and the fiber post.
• Different application methods of silane may influence the bond strength and durability of the restoration.

Purpose of the Study:

• To compare the bond strength of fiber posts when silane is applied separately versus when an adhesive containing silane is used.
• To evaluate the effect of these two silane application methods on the fracture patterns of the cement interface.

Main Methods:

• Twenty fiber posts were divided into two groups: silane followed by adhesive (G1) and adhesive containing silane (G2).
• Fiber posts were cemented into AllCem Core resin cement cylinders.
• Bond strength was assessed using the pushout test, and fracture patterns were analyzed microscopically.

Main Results:

• No significant difference in bond strength was found between the silane/adhesive group and the adhesive with silane group.
• Type 3 fracture pattern (cohesive failure within both the post and the cement) was the most prevalent in both groups.

Conclusions:

• The use of an adhesive containing silane does not compromise the bond strength of fiber posts cemented with AllCem Core resin cement.
• Both tested techniques yielded similar bond strength results, with subtle differences noted in fracture patterns.