Fracture strength of composite fixed partial denture using bovine teeth as a substitute for human teeth with or without fiber-reinforcement

Brazilian Dental Journal

Carlos José Soares²  Liliane Minglini Barbosa²  Fernanda Ribeiro Santana²  Priscilla Barbosa Ferreira Soares¹  Adérito Soares Da Mota¹  Gisele Rodrigues Da Silva² 

[1] ,Federal University of Uberlândia Dental School Department of Operative Dentistry and Dental MaterialsUberlândia MG ,Brazil

关键词: glass fiber;    composite partial denture;    human teeth;    bovine teeth;    fracture strength;   

DOI  :  10.1590/S0103-64402010000300011

来源: SciELO

【 摘 要 】

This study evaluate the use of bovine teeth as a substitute for human teeth on fracture strength tests of composite fixed partial dentures (Cpd), with and without fiberglass reinforcement (Fg). Eighty teeth were selected, being 40 bovine incisors, 20 human premolars and 20 molars. Bovine incisors were ground to get a platform, simulating an occlusal surface of human molar. Teeth in pairs were embedded in polystyrene resin, simulating the periodontal ligament and divided in 4 groups: B-Cpd-Fg: bovine teeth restored with Cpd with Fg; B-Cpd-NFg: bovine teeth restored with Cpd without Fg; H-Cpd-Fg: human teeth restored Cpd with Fg; and H-Cpd-NFg: human teeth restored with Cpd without Fg. The Cpd were adhesively fixed and submitted to an axial compression load at the pontic center with a crosshead speed of 0.5 mm/min until fracture. Failure modes were assessed and classified. Data were subjected to two-way ANOVA and Tukey's HSD test (?=0.05). The tooth type had no influence on fracture strength and fracture mode. The inclusion of fiberglass increased significantly the fracture strength. The failure modes were more reparable in groups with fiber-reinforcement. Bovine teeth can be used as a substitute for human teeth in these types of fracture strength tests.

【 授权许可】

CC BY   
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