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),
The names of the months all come from Latin, the language of the Roman Empire: 1  enero â from the Roman god Janus, the guardian or doors and gates. 2  febrero â from a word meaning purify.. 3  marzo â from Martius, the word for the planet Mars. 4  abril â meaning uncertain. 5  mayo â possibly from Maia, a Roman earth goddess.