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.
Planetary (iPad) Planetary might not be the most practical music player available in the App Store, but it is certainly among the most beautiful. The app arranges your music alphabetically into a collection of galaxies, which users can fully explore using their deviceâs gyroscope or camera.