Due to the presence of a rigid cell wall, bacteria maintain a definite shape, though they vary as shape, size and structure. When viewed under light microscope, most bacteria appear in variations of three major shapes: the rod (bacillus), the sphere (coccus) and the spiral type (vibrio). They measure about 0.25 Âµ and are the smallest cells known so far. 2  They were formerly known as pleuropneumonia-like organisms (PPLO). 3  Mycoplasma gallicepticum, with a size of approximately 200 to 300 nm are thought to be the world smallest bacteria.
Replacing 1 front tooth would cost about $50 so about $100 for 2 front teeth but the cost will vary depending upon your dentist and his experience level. To know the exact cost you must consult your dentist.
According to Animated-Teeth.com, a single unit--a bridge used to replace the gap of one tooth--made of porcelain and fused to precious or non-precious metal, will average between $740 to $1350.An all metal, single unit containing gold or other precious metals will have an average price of $730 to $1350. dental bridge requires the existence of two adjacent teeth and will cost, on average, about $800 for the two cementing crowns...