The effect of addition of barium sulphate nanoparticles on some properties of Acetal resin

Kaify Wali Ahmed; Rizgar Mohammed Ameen Hasan

doi:10.15218/zjms.2017.039

Authors

Kaify Wali Ahmed Department of Prosthodontics, College of Dentistry, Hawler Medical University, Erbil, Iraq.
Rizgar Mohammed Ameen Hasan Department of Prosthodontics, College of Dentistry, Hawler Medical University, Erbil, Iraq.

DOI:

https://doi.org/10.15218/zjms.2017.039

Keywords:

Thermoplastic, BaSO4nanoparticles, Acetal resin, Radio-opaque

Abstract

Background and objective: Acetal resin or polyoxymethylene is a flexible thermoplastic radiolucent denture base material. This study aimed to evaluate the addition of barium sulfate BaSO₄ nanoparticles on the mechanical and physical properties of acetal resin.

Methods: Forty two specimens were prepared from both non-modified and modified acetal resin. The tested specimens were obtained by melt extrusion into the mold equipment followed by injection molding. The radio-opacity of non-modified and modified evaluated, and then some mechanical and physical properties tested.

Results: The results of radio-opacity test showed that the radiographic density of BaSO₄ 3% Acetal resin specimens was at the same level of 2mm thickness of the aluminum stepwedge. Non-significant decrease noted in surface roughness, creep in all strain regions, and compressive strength and modulus of elasticity.

Conclusion: It has been concluded that the addition of 3% BaSO₄nanoparticles produced an acceptable radio-opaque Acetal resin denture base material. Although the addition caused some changes in properties, the modified Acetal resin remained as a flexible thermoplastic material.

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