Adhesion of composite resin to bone--a pilot study

Area of Science:

• Biomaterials Science
• Dental Materials
• Surgical Adhesion Research

Background:

• Dental composite resins are widely used in restorative dentistry.
• Achieving reliable adhesion between bone and restorative materials is crucial for clinical success.
• Investigating novel methods for enhancing bone-to-composite adhesion is an ongoing area of research.

Purpose of the Study:

• To evaluate the adhesion of composite resin to pig calvarium using a specific dentine bonding agent.
• To compare the effects of different bone preparation methods on bond strength.
• To determine the optimal surface treatment for maximizing bone-composite adhesion.

Main Methods:

• An in vitro model using pig calvarium was established.
• Composite resin adhesion was tested using the All-bond 2 dentine bonding agent.
• Bone surfaces were prepared using acid-etching and roughening with a surgical bur.

Main Results:

• Acid-etching significantly decreased the bond strength between the bone and composite resin.
• Roughening the bone surface with a surgical bur prior to adhesive application resulted in higher bond strengths.
• Achieved bond strengths ranged from 11.1 to 16.1 MPa with the roughening method.

Conclusions:

• Surface preparation significantly impacts composite resin adhesion to bone.
• Surgical bur roughening is a more effective method than acid-etching for enhancing bone-composite adhesion in this model.
• These findings suggest potential improvements for bone-grafting and dental implant procedures.