Document Type : Research Paper


Materials Engineering Dept., University of Technology-Iraq, Alsina’a street, 10066 Baghdad, Iraq.


In this study, two different types of polymers—Polyamide (PA) type (6) and Polyvinylpyrrolidone (PVP) type (K30), each added separately with a different weight fraction (0%, 2%, 4%, 6%) to Polymethylmethacrylate (PMMA) heat-cured resin as blend matrix—have been blended with heat-cured PMMA resin to develop the PMMA resin properties used for prosthesis complete denture. Sisal and coconut powder, two natural powders, were added separately to the polymer blend matrices with varying weight fractions (2%, 4%, 6%) to create composite specimens. Testing for density, water absorption, thermal conductivity, FTIR, and DSC were included in this study. The results show that adding reinforcing powders and polymer blends increases density, water absorption, and thermal conductivity, except PA powder, which lowers density values. The ultimate thermal conductivity and the most negligible density value were (0.289 W/m. k and 1.182 gm/cm3), respectively, for (PMMA-6% PA). The highest water absorption value was (1.007%)for (PMMA-2% PA-6% coconut). According to FTIR and DSC tests, the miscibility between blend constituents is good, and no additional materials are formed in specimens. These findings lead to the conclusion that one of the promising composite materials that can be used for improving some physical properties of a denture base, and they are, is composed of a blended matrix and natural materials reinforcement. The materials which are used in this search are an introduction to future research in the applications of dental and other applications.

Graphical Abstract


  • Using natural particles to produce safe and healthy working environments is essential
  • It was necessary to improve the properties of PMMA resin by reinforcing it with natural powders
  • Composite denture base properties varied with components' types and weight fractions 


Main Subjects

  1. N. Kadhim, Q. A. Hamad, J. K. Oleiwi, Influence of pistachio shell powder reinforcement on FTIR and DSC behavior of PMMA acrylic resin, Iraqi J. Mech. Mater. Eng., 20 (2020) 63–76.
  2. T. Jiann Chong, J. W. Ng, P.-C. Lee, Classification and Medical Applications of Biomaterials–A Mini Review, BIO Integr., (2022) 1–8.
  3. Liu, H. Liu, A. Clasky, H. Yang, L. Yang, New Frontiers in Biomaterials Research for Tissue Repair and Regeneration, Transl. Neurosci. Clin., 2 (2016) 120–137.
  4. Todros, M. Todesco, A. Bagno, Biomaterials and their biomedical applications: From replacement to regeneration, Processes, 9 (2021) 1949.
  5. Bharadwaj, An Overview on Biomaterials and Its Applications in Medical Science, IOP Conf. Ser. Mater. Sci. Eng., 1116 (2021) 012178.
  6. M. Hamouda, A. Makki, History and Development of Polymeric Denture Base Reinforcement, Acta Sci. Dent. Sci., 6 (2022) 111–121.
  7. A. Alanazi, A. Bader, Appraise the different types of polymer used in denture base Through their physical property (water sorption ) College of Dentistry, Jouf University, 2020.
  8. Berladir, D. Zhyhylii, O. Gaponova, J. Krmela, V. Krmelová, A. Artyukhov, Modeling of Polymer Composite Materials Chaotically Reinforced with Spherical and Cylindrical Inclusions, Polymers, 14 (2022) 2087.
  9. Khoramishad, M. V. Mousavi, Hybrid polymer composite materials, AIP Conf. Proc., 2019,
  10. Kumar, S. Ali, Denture Base Resins From Past to New Era, Eur. J. Mol. Clin. Med., 7 (2020) 972–977.
  11. A El Sharkawi1, I. M Hamouda, A. M. Gomaa, A. H. El Shkouki, Retention of Probase Hot Versus the Conventional Heat- Cured Acrylic Resin Denture Bases, Biomed. J. Sci. Tech. Res., 1 (2017) .
  12. Banjong, N. Sankham, W. Duangnga, U. Intatha, N. Soykeabkaew and S. Duangphet, The modification of acrylic denture base resin as materials for artificial teeth: Effect of hydroquinone and methyl methacrylate monomer, Sci. Asia, 46 S, (2020) 97–101.
  13. Vivek and R. Soni, Denture base Materials: Some Relevant Properties and their Determination, Int. J. Dent. Oral Heal., 1 (2016) 2–4.
  14. O. Alhareb, H. M. Akil and Z. A. Ahmad, PMMA Denture Base Composites Reinforced by Nitrile Rubber and Ceramic Fillers, Polym. Polym. Compos., 24 (2016) 71–79.
  15. Ş. Yıldızhan, A. Çalık, M. Özcanlı and H. Serin, Bio-composite materials: a short review of recent trends, mechanical and chemical properties, and applications, Eur. Mech. Sci., 2 (2018) 83–91.
  16. A. Khalaf, H. M. Mahan, A. K. J. Al-Shamary and M. M. Hanon, Effect of Hybrid Materials Configuration on The Mechanical Properties of Composites, J. Appl. Sci. Eng., 25 (2022) 873–880.
  17. A. Shabeeb, D. S. Mahjoob, H. M. Mahan and M. M. Hanon, Mechanical and Thermal Conductive Properties of Natural and Synthetic Cellulose Reinforced Epoxy Composites, IIUM Eng. J., 23 (2-22) 193–204.
  18. Sudarsono, H. Hidayat, R. Othman, and A. Aminur, Mechanical Properties of Particulate Coconut Shell and Palm Fiber Reinforced Polymer Matrix Composites, Int. Conf. Environ. Awareness Sustainable Dev. conjunction with Int. Conf. Challenge and Opportunities Sustainable Environ. Dev., ICEASD & ICCOSED 2019, 1-2 April 2019, Kendari, Indonesia (2019).
  19. N. Azwa, B. F. Yousif, A. C. Manalo and W. Karunasena, A review on the degradability of polymeric composites based on natural fibres, Mater. Des., 47 (2013) 424–442.
  20. C. Venkateshappa, B. Bennehalli, M. G. Kenchappa and R. P. G. Ranganagowda, Flexural behaviour of areca fibers composites, BioResources, 5 (2010) 1846–1858.
  21. Prawesthi, M. M. Tetelepta, and H. Heldayani, Evaluation of Water Absorption and Linear Dimensional Changes of Acrylic Resin Denture Base Reinforced with Ramie and Banana Stem Fibers, IOSR J. Dent. Med. Sci., 21 (2022) 50-56.
  22. Mohammed and M. Attallah, Analysis of Wear, Tensile and Thermal Properties of Poly Methyl Methacrylate Filled with Licorice Particle and Pomegranate Peels, Eng. Technol. J., 38 (2020) 1539–1557.
  23. Ergun, Z. Sahin and A. S. Ataol, The effects of adding various ratios of zirconium oxide nanoparticles to poly (methyl methacrylate) on physical and mechanical properties, J. Oral Sci., 60 (2018) 304–315.
  24. M. Abdul Monem, Q. A. Hamad and J. K. Oleiwi, Density and Water Absorption Properties of Pmma Reinforced By Peanut and Walnut Shells Powders Used in Dental Applications, Iraqi J. Mech. Mater. Eng., 21 (2021) 46–53.
  25. Oleiwi, Q. Hamad and N. Kadhim, Study Compression, Hardness and Density properties of PMMA Reinforced by Natural Powder Used in Denture Base applications, Eng. Technol. J., 37 (2019) 522–527.
  26. E Badr, H. M Sakr, M. A Masoud and M. A Quassem, Comparative study of some properties of flexible and conventional heat cured acrylic resin denture base material, Al-Azhar J. Dent. Sci., 21 (2018) 87–91.
  27. Yesildal, E. Kul, R. Yesildal and K. A. Matori, Investigation of the thermal conductivity and flexural strength of polymethylmethacrylate denture base material with SiC and Al2O3added, Mater. Plast., 58 (2021) 91–99.
  28. ASTM E1252, Standard Practice for General Techniques for Obtaining Infrared Spectra for Qualitative Analysis, Annu. B. ASTM Stand., 03, Reapproved (2013).
  29. ASTM International, Standard Test Method for Transition Temperatures and Enthalpies of Fusion and Crystallization of Polymers by Differential Scanning, ASTM Stand., D4318-08 (2012) 1–7.
  30. A. Hamad, Study the Effect of Nano Ceramic Particles on Some Physical Properties of Acrylic Resins, Eng. Technol. J., 35 2A (2017) 124–129.
  31. E. Baciu, J. Simitzis and D. Giannakopoulos, Synthesis and characterization of acrylic bone cement reinforced with zirconia-bioceramic, Dig. J. Nanomater. Biostruct., 7 (2012) 1779–1786.
  32. E. Motaung, A. S. Luyt, M. L. Saladino, D. C. Martino and E. Caponetti, Morphology, mechanical properties and thermal degradation kinetics of PMMA-zirconia nanocomposites prepared by melt compounding, Express Polym. Lett., 611 (2012) 871–881.
  33. K. Oleiwi, Q. A. Hamad and S. A. Abdulrahman, Comparative Study of Polymeric Laminated Composites Reinforced by Different Fibers of Prosthetic Socket by DSC and FTIR, Key Eng. Mater., 911 (2022) 3–8.
  34. Stanley R. S., Wolf , Jo-Anne B. and Eli M. P., Polymer Synthesis and Characterization A Labrotary Manual, Academic Press, New York, 1998.
  35. N. Abdulhamed and A. M. Mohammed, Evaluation of thermal conductivity of alumina reinforced heat cure acrylic resin and some other properties, J. Bagh. Coll. Dent., 22 (2010) 1–7.
  36. K. Oleiwi, Q. A. Hamad and H. J. A. Rahman, Study Thermal Behavior of Heat Cure Poly (Methyl Methacrylate) Reinforced By Bamboo and Rice Husk Powders for Denture Applications, Al-Qadisiyah J. Eng. Sci., 11 (2019) 417–425.
  37. K. Oleiwi, S. I. Salih and H. S. Fadhil, Water absorption and thermal properties of PMMA reinforced by natural fibers for denture applications, Int. J. Mech. Prod. Eng. Res. Dev., 8 (2018) 1105–1116.