The ideal goal of prosthetic dentistry is to restore the form and function of the missing structures as close to natural as possible. The introduction of implants have revolutionized the field of restorative dentistry and this article evaluates the merits and demerits of the immediate loading implants
The dropping mercury electrode polarographic behavior of sulfur and selenium solutions in hydrazine hydrate has been studied in highly alkaline aqueous solution containing supporting electrolyte of 0.1 M ammonium tartrate (1 M=l mol dm−3). Both the sulfur and selenium revealed a composite anodic–cathodic waves. The values of E1⁄2 for sulfur and selenium solutions, taken from the cathodic wave of the polarograms corresponded to E1⁄2=−0.78 and −1.03 V vs. SCE respectively. The effect of mercury pressure and concentration of depolarizer on the relative magnitude of the wave heights has also been studied on the basis of typical reactions involved at DME in this solvent medium. No maxima supressor was used in the present study for both cases.
Bone age assessment defined as the measure of skeletal development is most often used in pediatrics and forensics to estimate the true age of a person. It is usually done by comparing the left hand X-ray of a person with the hand radiographs in the standard atlas or based on local regions of interests (ROI) that include epiphyseal regions of the phalanges (14 ROI’s).Both these assessments were labour intensive, prone to discrepancies and can only be used to estimate the age till 18. Hence there is a need to develop automated method to assess the bone age by exploiting the appropriate features. This paper attempts to identify a procedure in recognizing the respective bone that belongs to male or female with its corresponding age. The automated procedure comprises of segmentation of metacarpals using area based statistics followed by typical feature extraction. Nine features are extracted for the experimental study. A back propagation neural network is then applied to classify whether the given sample refers to male or female bone. It is observed from the simulation results that the proposed procedure is found to be less computation burden and the results are found to be comparable with the existing work reported in the literature.
INTRODUCTION: The most important property of Fluoride is anti-cariogenic property which aids in remineralization of incipient carious lesions in enamel thereby inhibiting enamel demineralization i.e. it helps in arresting or reversal of incipient enamel lesions. A prolonged exposure of incipient carious lesions to uoride in the aqueous phase achieves the cariostatic effect. OBJECTIVES: The aim of the present study is to evaluate the amount of uoride released by three different Restorative Materialsi.e. Glass Ionomer Cement, Resin Modied Glass Ionomer Cement, Cention on 1st,7th and 15th day followed by Recharge and Re-release after recharging with various Flouride applications. MATERIALS AND METHODOLOGY: Fifteen Disk-shaped specimens for each group (8.5 mm diameter; 3 mm thickness) were prepared from three different restorative materials using cylindrical Teon molds according to manufacturer's instructions. The specimens in each individual group were incubated in a 95% relative humid environment at 37°C for 24 hours. Specimens of each group were immersed in 20 ml deionized water in plastic bottles and stored in the incubator at 37°C, Fluoride concentration was measured using a UV Spectrophotometer after 1st ,7th & 15 days. The samples from each group were now divided into: 3 Sub Groups of ve each. Sub Group A - Control group – No topical uoride application. Sub Group B - The samples were recharged with 2% Neutral Sodium Fluoride solution for 4 minutes and washed with copious deionized water for 10 sec and dried on absorbent paper. Sub Group C - The samples were recharged by hand brushing with a Fluoridated brushing Dentifrice for four minutes and then wiped clean with a tissue and rinsed for 10 sec using copious deionized water and dried. Measurement of uoride Re-release is done by UV Spectrophotometer after 1st ,7th and 15thday after recharge.The results were statistically analysed using analysis of variance (one-way ANOVA) and Tukey Kramer multiple comparison tests (p≤0.05). RESULTS: Independent of the observation time period of thestudy the Conventional GIC released the highest amount of uoride followed by RMGIC & CENTION. The initial burst effect was seen with GIC'S but not with RMGIC, CENTION. After topical uoride application uoride re-release was highest in Sub Group B and GIC had a greater recharging ability followed by RMGIC & CENTION. The uoride re-release was greatest on 1st day followed by rapid return tonear exposure levels. CONCLUSION: From the study it was concluded that, the initialFluoride release was highest from Conventional GIC followedby Resin Modied GIC, CENTION. The Fluoride release was high when recharging with professional regime (2%NaF) as compared to home regime (Toothpaste).
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.