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.
Without dental insurance, the national average costs of common preventive services are as follows, according to the American Dental Association [1] : 1  Periodic examination by a general dentist â $44.10. 2  Prophylaxis (cleaning) â $61.14 (child), $82.08 (adult).3  Topical fluoride application â $31.70 (child), $32.59 (adult).owever, with dental insurance, preventive care may cost little or nothing on top of your monthly premium, which may cost as little as $15 per month. Many dental plans cover two preventive care visits per year at or near 100 percent.