A New Test That Uses Saliva Samples to Predict a Person's Age

Assessment might prove useful in solving crimes and improving care, researchers say A new test that uses a saliva sample to predict a person's age within a five-year range could prove useful in solving crimes and improving patient care, University of California, Los Angeles geneticists say. Their test focuses on a process called methylation, a chemical modification of one of the four building blocks that make up DNA.''

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Salivary Testing / Salivary Test

Saliva Introduction

Titanium and its alloys are widely used in dentistry as prosthetic appliances because of a high corrosion resistance and good biocompatibility. These valuable properties are caused by passive films that are rapidly formed in the body fluid environment [1-3]. Recently, mouth-rinses, toothpastes, and prophylactic agents containing fluoride are utilizing to prevent the dental caries. However, decreasing the corrosion resistance of titanium in solutions containing fluoride has been reported [4-12]. The corrosion behaviours are related to the concentration of fluoride and the surrounding environment Therefore, the surface reaction on titanium under the existence of fluoride is important to understand the corrosion and tarnish of titanium in oral environment. Recently the corrosion of titanium was suppressed in solutions containing fluoride and eugenol (Figure1).

Corrosion Inhibition of Titanium in Artificial Saliva Containing Fluoride

Eugenol occurs widely as a component of essential oils and is a major constituent of clove oil. It has been used since at least the nineteenth century, primarily as a flavouring agent, in a variety of foods and pharmaceutical products, and as an analgesic in dental materials. Recently it has been used as inhibitor on the corrosion of stainless steel in phosphoric acid solution

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