Launch This Resource. In 1950, Erwin Chargaff published a paper stating that in the DNA of any given species, the ratio of adenine to thymine is equal, as is the ratio of cytosine to guanine. This became known as Chargaff's ratio, and it was an important clue for solving the structure of DNA. Downloads. Downloads.
The average annual overhead for a dental office (not including the dentistâs salary) is $350,000. The average clinician works 33 hours per week for 48 weeks, which is 1,600 hours per year. By taking the $525,000 average annual revenue and dividing it by 1,600 hours, we get $312 an hour to keep the office operating profitably.
This is also the cheapest material for fillings. If you have dental insurance, expect to pay an average of about $89 for an amalgam filling. Without insurance, youâll pay up to $150 for a filling on one or two surfaces of the tooth. Amalgam fillings that cover three or more surfaces of the tooth run from $120 to $300. Composite material combines plastic with fine glass particles to create a filling that matches the color of the tooth.