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The Effect of Different Bonding Agents on the Bond Strength of Denture Teeth to Acrylic Resin
Neha Verma1, Dhanya P Nampoothiri2, Deepika R Pai3
1Department of Prosthodontics, Crown and Bridge, Government College of Dentistry, Indore, Madhya Pradesh, India.
Background:
Denture tooth-acrylic resin bonding strength significantly affects denture durability. Failures in this bonding can compromise both function and aesthetics. Various bonding agents have been developed to improve adhesion, but their performance differs. This study investigates the effects of different bonding agents on the bond strength between denture teeth and acrylic resin (AR).
Materials And Methods:
Sixty acrylic resin denture teeth were assigned to three groups (n = 20 per group) based on the bonding agent used: Group A (no bonding agent, control), Group B (using Ivoclar Vivadent's SR Link), and Group C (using GC Corp's Unifast). Denture teeth were bonded to heat-polymerized AR blocks under standardized conditions. A universal testing machine tested shear bond strength at 1 mm/min.
Results:
Group A (control) exhibited a mean bond strength of 10.5 ± 1.2 MPa. Group B (SR Link) showed significantly higher bond strength at 15.8 ± 1.5 MPa (P < 0.05), while Group C (Unifast) achieved the highest bond strength at 17.2 ± 1.3 MPa (P < 0.05). Group C was found to be superior to Groups A and B by post-hoc analysis.
Conclusion:
Bonding agents significantly improve the adhesion of denture teeth to AR. Among those tested, GC Corp's Unifast demonstrated the best performance. Incorporating effective bonding agents can enhance the longevity and clinical success of dentures.
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