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.
Deck-Armorâ¢ Breathable Roof Deck Protection is a key part of the GAF Lifetime Roofing System, and has even earned the prestigious Good Housekeeping Seal. * The GAF Lifetime Roofing System has earned the prestigious Good Housekeeping Seal, which means that Good Housekeeping stands behind the products in this system.eck-Armorâ¢ Breathable Roof Deck Protection is a key part of the GAF Lifetime Roofing System, and has even earned the prestigious Good Housekeeping Seal. * The GAF Lifetime Roofing System has earned the prestigious Good Housekeeping Seal, which means that Good Housekeeping stands behind the products in this system.