Salary Information for a COA. According to PayScale.com, as of October 2014, the average hourly wage for most certified orthodontic assistants (COAs) was between $11.75 and $22.17, with a median hourly income of $17.his is slightly higher than for the majority of non-certified dental assistants, whose hourly wages ran from $9.74 to $18.21 at the same time period. An associate's degree in dental assisting is required for a career as an orthodontic assistant.
quart. n. 1. (Units) a unit of liquid measure equal to a quarter of a gallon or two pints. 1 US quart (0.946 litre) is equal to 0.8326 UK quart. 1 UK quart (1.136 litres) is equal to 1.2009 US quarts. 2. (Units) a unit of dry measure equal to 2 pints or one eighth of a peck.
Gallon and quart are volume measurement units in imperial and US customary systems. There are fluid and dry measurement for both units in US customary but in not imperial system. The abbreviation for gallon is gal and for quart qt. For quarts to gallons converter, please go to quarts to gallons.