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Year : 2019  |  Volume : 6  |  Issue : 1  |  Page : 1-3

Evaluation and comparison of the effect of different chemical surface treatments (monomethyl methacrylate monomer, dichloromethane, and 1:1 v/v 30% trichloromethane and monomethyl methacrylate monomer solvent) on the shear bond strength of acrylic resin teeth to the heat cure denture base resin

1 Department of Prosthodontics, GDC &H, Mumbai, Maharashtra, India
2 Department of Prosthodontics, GDC &H, Aurangabad, Maharashtra, India

Correspondence Address:
Dr. Rupali Pathak
1104, Imperia, Mahavir Millenium, Vasant Vihar, Pokharan Road No. 2, Thane West, Thane - 400 607, Maharashtra
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Source of Support: None, Conflict of Interest: None

DOI: 10.4103/INPC.INPC_17_19

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Background: Prefabricated acrylic resin teeth for dentures were started in use from 1940. About 26%–33% of denture repairs are the result of debonded teeth which cause distress and increased cost for patients. Taking into consideration the importance of properly bonded teeth to denture bases, this in-vitro study was designed to evaluate and compare the effects of three different chemicals on shear bond strength of cross-linked acrylic resin teeth with heat cure denture base resin. Methodology: This study was carried out in Government Dental College and Hospital, Mumbai, in collaboration with the Indian Institute of Technology, Powai. For the purpose of the study, 100 maxillary right central incisors, made up of heat cure cross-linked acrylic resin (MAARC) were collected. The wax samples were randomly divided according to systematic random sampling and coded into four groups of 25 samples each. The four groups were the control group, the monomethyl methacrylate group, the dichlormethane group and trichloroethane+ monomethyl methacrylate group. Results: The control group had lowest value for shear bond strength ranging from 117 N to 181 N with a mean of 147.8 N, whereas 1:1 mixture of v/v of 30% trichloromethane and monomethyl methacrylate had the highest value ranged from 145 N to 310 N with the mean value of 224.88 N. Among the chemical solvents used, monomethyl methacrylate had the lowest shear bond strength ranging from 120 N to 256 N with the mean value 187.32 N. Conclusion: The study concluded that chemical surface treatment of cross-linked acrylic teeth with 1:1 v/v 30% trichloromethane and monomethyl methacrylate monomer gave the highest strength.

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