A secured transaction is a transaction that is founded on a security agreement. A security agreement is a provision in a business transaction in which the obligor, or debtor, in the agreement gives to the creditor the right to own property owned or held by the debtor.
If your brush has two speeds, and uses brush heads with slim-angled necks, then you have a Sonicare Elite. An Elite toothbrush has a thread collar screw on brush head.
Oral B Toothbrushes rank #1 and #2 for best electric toothbrushes for with braces and without. The basis of their brushes is the rotating heads, which dentists recommend for braces. There are models of the Oral B electronic toothbrushes that are lower in cost, but the higher end models are better for braces.