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),
Since March was the first month of the new year in ancient Rome, some historians believe the Romans named March after Mars, the Roman god of war. April: Three theories exist regarding the origin of April's name.ovember: November's name comes from novem, Latin for ânine.. December: December's name come from decem, Latin for âten.. February: Around 690 B.C., Numa Pompilius turned a period of celebration at the end of the year into a month of its own, named after the festival Februa.