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.
Safeguarding is a relatively new term which is broader than âchild protectionâ or âadult protectionâ as it also includes prevention. Safeguarding has been defined as:1  All agencies working with children, young people and their families, or vulnerable adults taking all reasonable measures to ensure that the risks of harm to childrenâs welfare are minimised; and.afeguarding is a relatively new term which is broader than âchild protectionâ or âadult protectionâ as it also includes prevention. Safeguarding has been defined as: