Irish word for fun/enjoyment that has been brought into the English language. usu. when mixed with alcohol and/or music. 'Bhi craic agus ceol againn' : We had fun and music. Fun doesn't really cut it though. General banter, good times had by all. Also, a person who is good fun/great company.
Some of the bacteria in plaque cause tooth decay, and some are responsible for periodontal, or gum, disease. Plaque is always with us. A newborn baby's mouth is sterile, but only for the first ten hours or so of life. Tartar is a calcified material that often contains bacterial debris and sometimes plaque.
Some toothpastes contain abrasive ingredients that may be too harsh for people who have sensitive teeth. Ingredients found in some whitening toothpastes that lighten and/or remove certain stains from enamel and sodium pyrophosphate, the key ingredient in tartar-control toothpaste, may increase tooth sensitivity.