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.
â¢ PLANETARY (adjective). The adjective PLANETARY has 4 senses: 1. of or relating to or resembling the physical or orbital characteristics of a planet or the planets. 2. of or relating to or characteristic of the planet Earth or its inhabitants. 3. having no fixed course. 4. involving the entire earth; not limited or provincial in scope. Familiarity information: PLANETARY used as an adjective is uncommon.