There is a revolving rake to scrape settled grit to a sump for removal. The heavy material settles to the bottom and is then dragged upwards by means of a rake, and then discharged. A rake is a device used in thickeners and settlers to move the settled solids toward the place where they leave the vessel.
The average costs of deep cleaning is between $100-to-$400 per quadrant. This means that if you are getting all four areas scaled and planed, it can cost you as little as $400 or as much as $1,600. About how much you will pay depends on where you live.
This includes the cost of local anesthesia and follow visits. The cost for a regular dental cleaning, called prophylaxis, averages between $75 and $85, while the average cost for periodontal scaling and root planing (deep cleaning) is between $175 and about $900. Periodontal maintenance costs after undergoing periodontal treatment average $115.