Because the brackets and archwire are actually placed at the back of your teeth, they are virtually undetectable, allowing you to retain your normal appearance for the duration of your treatment. You doctor took courses specializing in the placement of these braces.
DEFINITION of 'Cost Center'. A department within an organization that does not directly add to profit, but which still costs an organization money to operate. Cost centers only contribute to a company's profitability indirectly, unlike a profit center which contributes to profitability directly through its actions.
Difference between Cost Center & Internal Order. Internal orders are an excellent means of managing costs. Internal orders have many controls such as Execution profile, status profile, budget profile, plan profile etc to manage the costs. http://www.sap-img.com/financial/difference-between-cost-centers-and-internal-orders.htm Internal Orders are used for short term purpose like Trade Fairs, Job Fairs etc., where as Cost Centers are used for long term purpose to capture the day to day costs.