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.
A beautiful porcelain crown on a front tooth will generally cost much more than a basic crown on a back tooth. Besides the functional requirements, the porcelain crown on a front tooth will have to look perfect in order to blend in with the other teeth. Visit our cosmetic dentistry costs page for fee survey information about the costs of porcelain crowns and other cosmetic dentistry procedures. 2  This page also contains general information about dental costs that will help you interpret this information. 3  Click here to learn more about porcelain crowns on front teeth.