1 Either an acute injury near the nail or anything that causes the nail to be damaged repetitively (such as playing soccer) can also cause an ingrown nail.  If a member of your family has an ingrown toenail, then you are more likely to develop one, too.
The troy ounce (symbol and abbreviation: ozt) is a non-SI unit of mass commonly used to gauge the weight of precious metals. One troy ounce (ozt) = 31.1034768 grams (g) = 1.09714286 ounces (oz) = 480 grains (gr).
To find out how many pounds in an ounce, multiply by the conversion factor or use the converter below. 1 Ounce = 0.0625 (1/16) Pound. Ounce is an imperial and U.S. customary mass unit. Troy ounce is used for the measurement of precious metals, gold, silver etc. The abbreviation is oz.