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.
1 February: On February 15 the Romans celebrated the festival of forgiveness for sins; (februare, Latin to purify), 2  March: Mars, the Roman god of war,  April: Roman month Aprilis, perhaps derived from aperire, (Latin to open, as in opening buds and blossoms) or perhaps from Aphrodite, original Greek name of Venus,
The Latin poet Ovid claimed that the month may have been named after the Latin word maiores, âelders,â to juxtapose it to the month of June, which was named after iuniores, the Latin word for youth. The month of May entered English from the Old French in the 1000s. In Old English, the month of May and âmother may Iâ could not be confused because there was another name for the month of May. Sadly, we lost the Old English word for the fifth month of the year: Ã¾rimilce.