Disadvantages of In-Office Whitening. 1  In-office bleaching is more expensive than take-home alternatives. 2  Its cost, on average, is $650, compared to $400 for take-home trays and under $100 for over-the-counter bleaching trays or whitening strips.
Planetary protection is a guiding principle in the design of an interplanetary mission, aiming to prevent biological contamination of both the target celestial body and the Earth in the case of sample-return missions.
ERA Home Protection Plan Â® The ERA Home Protection Plan, administered by American Home Shield, is a service contract that covers the repair or replacement of many of the most frequently occurring breakdowns of home system components and appliances. It lets homeowners know they're okay if something goes wrong with a covered item.