In vitro and clinical evaluations of a dentin bonding system with a dentin primer

Area of Science:

• Dental Materials Science
• Biomaterials Engineering

Background:

• Dentin bonding agents are crucial for dental restorations.
• Improving the bond strength between dentin and composite materials is a key challenge in restorative dentistry.

Purpose of the Study:

• To evaluate the efficacy of a dentin primer in enhancing dentin-to-composite bond strengths.
• To assess the clinical performance of a dentin primer-adhesive system in restoring cervical erosion lesions.

Main Methods:

• In vitro tensile bond strength testing using bovine dentin treated with a HEMA-based primer for varying durations.
• Clinical evaluation of 33 cervical erosion restorations using the primer, adhesive, and composite, without enamel etching or mechanical retention.
• Follow-up assessments at 6 months (30 restorations) and 1 year (15 restorations).

Main Results:

• The dentin primer significantly increased bond strength in vitro.
• All clinical restorations demonstrated 100% retention at both 6-month and 1-year recalls.
• The primer, adhesive, and composite system showed excellent clinical durability.

Conclusions:

• The tested dentin primer effectively enhances dentin-to-composite bond strength.
• The primer-adhesive system provides durable and retentive restorations for cervical erosion lesions.
• This approach offers a promising solution for adhesive dentistry without relying on enamel etching or mechanical locks.