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.
1 There may be separate charges for an initial exam ($20-$100 or more) and dental X-rays ($10-$250). 2  If the tooth has extensive decay, become infected or been injured, a root canal ($300-$1,500 for a front tooth, $500-$2,000 for a molar) might be needed before the crown can be installed. If a large area of tooth is missing because of decay or damage, there may be an additional charge of $150-$250 or more to build up the tooth (although some dentists include this cost in their quoted price for a crown).