ABSTRACT
The purpose of this study was to evaluate the effects of Scrophularia striata water extract on the quality and shelf life of the rainbow trout fillet during superchilled storage. Fish samples were treated with 1% and 3% S. striata water extract and then stored at -2[degree]C for 20 days. The samples were analyzed periodically for chemical, microbial and sensory characteristics. Results indicated that incorporation of S. striata water extract on rainbow fillets caused the delay of lipid peroxidation and hydrolytic spoilage in 3% treated sample in comparison with the control sample at the last day of the experiment [P<0.05]. Moreover, fish fillets containing 3% S. striata water extract showed lower bacterial count than the control and 1% water extract supplemented samples [P<0.05] during the experiment. According to sensory analysis results, 3% treated samples were acceptable even at the end of the 20-day storage. It was concluded that the effect of S. striata extract on fish samples was to retain their good quality characteristics and extend the shelf life during superchilled storage
ABSTRACT
Statement of Problem: Contamination during the procedure is the main reason for failure of fissure sealant therapy. In clinical conditions with difficult isolation such as semi-erupted tooth or poor cooperation of the patient, the contamination is probable. There is a limited number of clinical studies regarding the effect of adhesive on the success rates of fissure sealant
Purpose: The present study was conducted to compare the effects of two adhesives on the success rate of fissure sealant in the contaminated enamel
Methods and Material: In this clinical trial, 35 school children [6-8 years of age] with healthy and newly-erupted upper molar teeth participated. Sixty molar teeth were selected and divided into two groups. PQ1 adhesive was used for one group and PROMPT-L-POP for the other. As the teeth were newly erupted and the distopalatal area was in contact with the gingival sulcus and therefore it was impossible to isolate, the distal area was considered as contaminated and the mesial area, capable of adequate isolation, was assumed as isolated. In each group, after etching in one side, the teeth were treated only with sealant and on the other side before treatment with sealant, firstly the bonding agent was applied. So, two control groups were formed for each bonding agent. After 3, 6 and 12 month intervals, the results of the treatment were studied in terms of the success and failure and then analyzed using Wilcoxon, Mann Whitney and Chi-square tests
Results: The success rate of the sealant treatment increased significantly, by using adhesives [p <0.001]. The use of the two adhesives significantly increased the success rate of the fissure sealant on the contaminated teeth, even more than when the teeth had been isolated properly and treated only with fissure sealant [ p <0.001]. The result of using PQ1 was better than that of Prompt-l-pop although the difference was not statistically significant
Conclusion: The results of the study showed that the contaminated enamel influenced the success of treatment after etching and before sealant application. So, the use of the adhesives in the treatment of fissure sealants is recommended in both the isolated and contaminated conditions