World Journal of Dentistry

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VOLUME 15 , ISSUE 4 ( April, 2024 ) > List of Articles


Functional Group Delineation and Double Bond Conversion of Dental Poly(methylmethacrylate) Resin Conjugated with a Spiroacetal Cross-linker: An In Vitro Characterization Research

Ranganathan Ajay, Chandramohan Ravivarman, Rajkumar Daisy, Pradeep P Elango, Muthupettai V Srikanth, Gurunathan Deepa

Keywords : Copolymerization, Cross-link, Denture copolymer, Double bond conversion, Spiroacetal

Citation Information : Ajay R, Ravivarman C, Daisy R, Elango PP, Srikanth MV, Deepa G. Functional Group Delineation and Double Bond Conversion of Dental Poly(methylmethacrylate) Resin Conjugated with a Spiroacetal Cross-linker: An In Vitro Characterization Research. World J Dent 2024; 15 (4):356-361.

DOI: 10.5005/jp-journals-10015-2406

License: CC BY-NC 4.0

Published Online: 17-05-2024

Copyright Statement:  Copyright © 2024; The Author(s).


Aim: To characterize and identify the functional groups as evidence for copolymerization (CP) and evaluate the double bond conversion (DBC) of a novel poly(methylmethacrylate) [P(MMA)] copolymer with a spiroacetal cross-linker at 10 and 20% concentrations using Fourier-transform infrared (FTIR) spectroscopy. Materials and methods: The in vitro research consists of three groups—a control group G0 (without spiroacetal cross-linker) and two investigational groups G10 and G20 with spiroacetal cross-linker at 10 and 20 wt% concentration, respectively. This spiroacetal cross-linker was added to the powder-liquid mixture during manipulation at the predetermined trial concentrations. The CP and DBC% were determined and analyzed using infrared spectroscopy. The obtained DBC% values were submitted for statistical evaluation. Results: Incorporation of the spiroacetal cross-linker in the P(MMA) resulted in a new denture base copolymer through CP which was ascertained by the appearance of new peaks between 1075 and 1190/cm in both investigational groups. Nevertheless, the new copolymer exhibited statistically greater DBC than the P(MMA). The mean DBC% of the control, G10, and G20 groups were 62.88, 69.52, and 83.00%, respectively. Conclusion: The incorporated spiroacetal cross-linking comonomer successfully copolymerized with the denture base acrylic resulting in a new copolymer exhibiting high DBC%. Clinical significance: Existing drawbacks concerning the physicomechanical and biological properties of denture base resin can be mitigated by the new denture base copolymer containing spiroacetal cross-linker. This would benefit the elderly patient by providing prostheses with better mechanical strength, clinical longevity, and quality of life.

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