The Effect of UVC Radiation on Tensile Bond Strength between Heat-cured Acrylic Resin and Chemical-cured Acrylic Resin
Objective: To study the effects of ultraviolet C (UVC) radiation at various exposure times on tensile bond strength between heat- and chemical-cured acrylic resin.
Materials and methods: Fifty dumbbell-shaped, heat-cured acrylic resin specimens were prepared according to the ASTM standard No. D683 and randomly divided into five groups (10 per group). Each specimen was cut into two symmetrical parts. The cross-sectional area of each specimen was irradiated with UVC for a period specified for each group (0, 1, 5, 15 and 60 min) then chemical-cured acrylic resin was added to restore the dumbbell shape. A universal testing machine was used for the tensile bond strength testing (TBS). The data were analyzed by one way ANOVA and multiple comparison test at the 95% confidence interval.
Results: The tensile bond strength value at the boundaries between the heat- and the chemical-cured acrylic resin of the 1-and 5-min UVC irradiation groups (18.77±3.62 and 18.41±3.79MPa) were significantly higher than those of the other groups (p<0.05).
Conclusions: The heat-cured acrylic surface modification with UVC irradiation in the range of 1-5 minutes can significantly increase the tensile bond strength between the heat- and chemical-cured acrylic resin.
1. Beyli MS, Von Fraunhofer JA. An analysis of causes of fracture of acrylic resin dentures. J ProsthetDent 1981; 46: 238-241.
2. Darbar UR, Huggett R, Harrison A. Denture fracture-a survey. Br Dent J 1994; 176: 342- 345.
3. Stipho HD, Stipho AS. Effectiveness and durability of repaired acrylic resin joints. J Prosthet Dent 1987; 58: 249-253.
4. Polyzois GL, Andrepoulos AG, Lagouvardos PE. Acrylic resin denture repair with adhesive resin and metal wires: Effects on strength parameters. J Prosthet Dent 1996; 75: 381-387.
5. Berge M. Bending strength of intact and repaired denture base resins. Acta Odontol Scand 1983; 41: 187-191.
6. Dyer RA, Howlett JA. Dimensional stability of denture bases following repair with microwave resin. J Dent 1994; 22: 236-241.
7. Stanford JW, Burns CL, Paffenbarger GC. Self-curing resins for repairing dentures: some physical properties. J Am Dent Assoc 1955; 51: 307-315.
8. Shen C, Colaizzi FA, Birns B. Strength of denture repairs as influenced by surface treatment. J Proshthet Dent 1984; 52: 844- 848.
9. Ward JE, Moon PC, Levine RA, Behrendt CL. Effect of repair surface design, repair material, and processing method on the transverse strength of repaired acrylic denture resin. J Prosthet Dent 1992; 67: 815-820.
10. Seo RS, Neppelenbroek KH, Filho JNA. Factors affecting the strength of denture repairs. J Prosthodont 2007; 16: 302-310.
11. Vallittu PK, Lassila VP, Lappalainen R. Wetting the repair surface with methyl methacrylate affects the transvers strength of repaired heat-polymerized resin. J Prosthet Dent 1994; 72: 639-643.
12. Sarac YS, Sarac D, Kulunk T, Kulunk S. The effect of chemical surface treatments of different denture base resins on the shear bond strength of denture repair. J ProsthetDent 2005; 94: 256-266.
13. Shimizu H, Ikuhama T, Hayakawa E, Tsue F, Takahashi Y. Effect of surface preparation using ethyl acetate on the repair strength of denture base resin. Acta Odontol Scand 2008; 64: 159-163.
14. Minami H, Suzuki S, Minesaki Y, Kurashige H, Tanaka T. In vitro evaluation of the influence of repairing condition of denture base resin on the bonding of autopolymerizing resins. J Prosthet Dent J. 2004; 91: 164-170.
15. Jagger RG, al-Athel MS, Jagger DC and Vowles RW. Some variables influencing the bond strength between PMMA and a silicone denture lining material. Int J Prosthodont 2002; 15:55-88.
16. Curtis DA, Eggleston TL, Marshall SJ and Watanabe LG. Shear bond strength of visiblelight cured resin relative to heat-cured resin. Dent Mater 1989; 5:314-318.
17. Takahashi Y and Chai J. Assessment of shear bond strength between three denture reline materials and a denture base acrylic resin. Int J Prosthodont 2001; 14 :531-535.
18. Jacobsen NL, Mitchell DL, Johnson DL and Holt RA. Lased and sandblasted denture base surface preparations affecting resilient liner bonding. J Prosthet Dent 1997; 78 :153-158.
19. Shen C, Colaizzi FA and Birns B. Strength of denture repairs as influenced by surface treatment. J Prosthet Dent 1984;52: 844-848.
20. Ward JE, Moon PC, Levine RA and Behrendt CL. Effect of repair surface design, repair material, and processing method on the transverse strength of repaired acrylic denture resin. J Prosthet Dent 1992; 67:815-820.
21. Vallittu PK, Lassila VP and Lappalainen R. Wetting the repair surface with methyl methacrylate affects the transverse strength of repaired heat-polymerized resin. J Prosthet Dent 1994; 72: 639-643.
22. Rached RN and Del-BelCuryAA.Heat-cured acrylic resin repaired with microwave-cured one: bond strength and surface texture. J Oral Rehabil 2001; 28: 370-375.
23. Amin WM, Fletcher AM and Ritchie GM. The nature of the interface between polymethylmethacrylate denture base materials and soft lining materials. J Dent 1981; 9: 336-346.
24. Arima T, Nikawa H, Hamada T. and Harsini, Composition and effect of denture base resin surface primers for reline acrylic resins. J Prosthet Dent 1996; 75: 457-462.
25. Loyaga- Rendon PG, Takahashi H, Iwasaki N, Reza F. Effect of ultraviolet light irraditation on bonding of experimental composite resin artificial teeth. Dent Mater J 2007; 26: 805- 813.
26. Truckenmüller R, Henzi P, et al. Bonding of polymer microstructures by UV irradiation and subsequent welding at low temperatures. Microsystem Technologies 2004; 10: 372-374.
27. Truckenmuller R. Henzi P. Herrmann D. Saile V. Schomburg WK. A new bonding process for polymer micro- and nanostructures based on near-surface degradation. Micro Electro Mechanical Systems 2004. 17th IEEE International Conference on MEMS2004; 761- 764.
28. Efimenko K, Wallace WE, Genzer J. Surface modification of Sylgard-184 poly(dimethyl silicone) network by ultraviolet and ultraviolet/ozone treatment. J Colloid Interface Sci. 2002; 254: 306-15.
29. Hillborg H, Tomczak N, Olah A, Schoherr H, Vancso GJ. Nanoscale hydrophobic recovery: a chemical force microscopy study of UV/ Ozone treated cross-linked poly (dimethylsiloxane). Langmuir 2004; 20: 785-794.
30. MacManus LF, Walzak MJ, McIntyre NS. Study of ultraviolet light and ozone surface modification of polypropylene. J Polym Sci A: Polym Chem 1999; 37: 2489-2501.
31. Eve S, Mohr J. Study of the surface modification of the PMMA by UV radiation. Procedia Engineering 2009; 1: 237-240.
32. Caykara T, Güven O. UV degradation of poly (methyl methacrylate) and its vinyltriethoxysilane containing copolymers. Polymer Degradation and Stability 1999; 65: 225-229.