Genetic Diseases of the Teeth. Genetic diseases are caused by gene mutations that are inherited from one or both parents. Certain genetic diseases can cause abnormalities in the teeth, affecting the rate of development of primary (baby) and secondary (adult) teeth or their physical characteristics. Often, these genetic diseases affect the normal growth and health of other parts of the body, as well.
Osmium has only a few uses. It is used to produce very hard alloys for fountain pen tips, instrument pivots, needles and electrical contacts. It is also used in the chemical industry as a catalyst. Biological role.smium has only a few uses. It is used to produce very hard alloys for fountain pen tips, instrument pivots, needles and electrical contacts. It is also used in the chemical industry as a catalyst. Biological role.
Six additional manmade isotopes are known. Properties: Osmium has a melting point of 3045 +/- 30 Â°C, boiling point of 5027 +/- 100Â°C, specific gravity of 22.57, with a valence usually +3, +4, +6, or +8, but sometimes 0, +1, +2, +5, +7. It is a lustrous blue-white metal. It is very hard and remains brittle even at high temperatures. Osmium has the lowest vapor pressure and highest melting point of the platinum group metals. Although solid osmium is unaffected by air at room temperature, the powder will give off osmium tetroxide, a strong oxidizer, highly toxic, with a characteristic odor (hence the metal's name).