Aims and objectives: Since atraumatic restorative treatment (ART) involves removal of carious lesions with manual instruments, there are more chances of residual bacteria under the glass ionomer restoration which might lead to secondary caries. Hence improving the antibacterial effect of glass ionomer cement helps in achieving better success rate. This study aimed to evaluate the compressive strength of glass ionomer cement containing different antibiotics.
Materials and methods:Conventional restorative glass ionomer cement (Fuji IX) was used as control group. The experimental groups used were as follows: group 1: (Ciprofloxacin 50 mg + Cefuroxime 50 mg + metrogyl 50 mg) + GIC 9850 mg. Group 2: (ciprofloxacin 100 mg + cefuroxime 100 mg + metrogyl 100 mg) + GIC 9700 mg. Group 3: cetrimide 100 mg + GIC 9900 mg. Group 4: cetrimide 200 mg + GIC 9800 mg. Cylindrical specimens of dimensions 6 mm of length and 5 mm in diameter were prepared. The specimens were subjected to compressive loading using Instron universal testing machine at a crosshead speed of 1 mm/minute.
Results:The experimental groups showed lower compressive strength when compared to the control group. No significant difference was found between control group and group 1. The compressive strength of groups 2, 3 and 4 was significantly less when compared to control group and group 1.
A new steel reinforcement is recommended in the name Prefabricated Cage System (PCS) in the column. PCS is a non-conventional prefabricated cage reinforcement system that allows for simpler, quicker and more durable construction which can be utilized in Reinforced Concrete (RC) columns to replace traditional longitudinal and transverse steel. Besides having alike or greater strength correlated with the traditional reinforcement given in columns, the PCS decreases the construction schedule time and reduces the overall construction expense. The PCSwas manufactured through punching or cutting hollow steel tubes or plates by perforation, and PCS costs are often almost equal to traditional rebar reinforcement. The construction time can be greatly decreased by using PCS. In this article, instead of two types of traditional rebar reinforcements, two types of perforations were used in PCS reinforcement. Comparative research was performedfor the columns under axial loading among the PCS reinforcement and the traditional rebar reinforcement. Test results showed that the axial load carrying capacity of PCSspecimens was comparable or superiorto that of conventional reinforced concrete columns.
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