An investigation into the effects that orange juice and sugar free orange juice have on the transverse strength of heat cure acrylic.
Cardiff Metropolitan University
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Objectives The aim of this investigation is to compare the effects that orange juice and sugar free orange juice have on the transverse strength of 40mm long x 25mm wide x 2mm deep heat cured acrylic. Materials and method Oracryl pink veined polymer and oracryl monomer were used to make 30 acrylic samples (Bracon limited). The samples were 40mm length x 25mm width x 2mm depth (+/- 0.2mm). They were divided in to three groups of ten; one group was kept in an air tight container for 36 days, another group was soaked in 100ml of carton ambient temperature orange juice from concentrate and the final group was soaked in 100ml of carton ambient temperature sugar free orange juice drink. The samples were stored in the fridge (5oC) and soaked continuously for 36 days. After 36 days a 3-point bend test was preformed using a universal testing machine. Results The results show that the mean load of the control group was 86.15 MPa whilst the mean load of the samples soaked in juice was 78.29 MPa showing that the transverse strength of these samples had decreased. The mean load of the samples soaked in orange juice drink was 86.94 MPa meaning the transverse strength had increased. There was not a statistically significant difference. Conclusion The orange juice used in this study decreased the strength of the acrylic whilst the sugar free orange juice drink increased the strength of the acrylic.
BSc (Hons) Dental Technology
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