The Procera crown â Procera is a milled ceramic on the inside with a more traditional porcelain baked onto the outside. The advantage of Procera is its exceptional strength. However, the milled ceramic core is opaque white, so many cosmetic dentists feel that it isnât as natural-looking as the more translucent materials.
Origin of the Names of the Months. 1  January: Janus, Roman god of doors, beginnings, sunset and sunrise, had one face looking forward and one backward,  February: On February 15 the Romans celebrated the festival of forgiveness for sins; (februare, Latin to purify),
February was named in honor of this smoky festival. The experts do not entirely agree on how March came by its name. Some say it originally meant first and the month was named when it was the first month of the year. Others say that March is named for the raging delinquent Mars, who was the Roman god of tsar.Aprilis name comes from a word meaning to open. Surely this refers to the opening buds and bursting blossoms.he experts do not entirely agree on how March came by its name. Some say it originally meant first and the month was named when it was the first month of the year. Others say that March is named for the raging delinquent Mars, who was the Roman god of tsar.