Influence of fibre reinforcement on selected mechanical properties of dental composites

Acta of Bioengineering and Biomechanics

article

GRZEGORZ BARTNIK¹  AGATA WALCZAK²  DANIEL PIENIAK²  ANETA KRZYŻAK³  JOLANTA ZAMOŚCIŃSKA⁴  AGATA M. NIEWCZAS⁴ 

[1] Department of Mechanical Engineering and Automation, University of Life Science in Lublin;Department of Applied Mechanics, Main School of Fire Service in Warsaw;Department of Airframe and Engine;Department of Conservative Dentistry with Endodontics, Medical University of Lublin

关键词: mechanical properties;    ceramic-polymer light cured composites;    fibre reinforcement;   

DOI  :  10.5277/ABB-00486-2015-04

学科分类：生物科学（综合）

来源: Politechnika Wroclawska

【 摘 要 】

Purpose: For splinting or designing adhesive bridges, reconstructive composite structures with increased mechanical properties owing to embedded reinforcement fibres are used. The aim of this article was to determine the influence of glass and aramid fibres on the mechanical strength of composites reinforced with these fibres. Methods: Two polymer-ceramic microhybrid materials: Boston and Herculite were tested. Three types of reinforcement fibres were used: aramid (Podwiązka) with a single layer weave, a single layer weave glass fibre (FSO) and triple layer weave glass fibre (FSO evo). Tests were conducted in accordance with the requirements of ISO 4049:2009. The following material types were chosen for research: Boston, Boston + Podwiązka, Herculite, Herculite + Podwiązka, Herculite + FSO and Herculite + FSO evo. The scope of research included: flexural strength B, bending modulus of elasticity εB and work to failure of the reinforced composite Wfb. Additionally, microscopic observations of fracture occurring in samples were made. Results: In comparison: the Herculite (97.7 MPa) type with the Herculite + FSO evo (177.5 MPa) type was characterized by the highest strength. Fibre reinforcement resulted in decreasing the elasticity modulus: Herculite + reinforcement (6.86 GPa; 6.33 GPa; 6.11 GPa) in comparison with the Herculite (9.84 GPa) and respectively Boston + reinforcement (10.08 GPa) as compared with the Boston (11.81 GPa). Conclusions: Using glass fibres increases flexural strength of the test composites. Using aramid fibres does not change their strength. The elasticity modulus of the reinforced reconstructive structures decreases after application of either type of fibres. However, their resistance to the crack initiation increases.

【 授权许可】

Unknown