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.
What is a Surge Protector? A surge protector is designed to protect any device with a standard AC plug from damaging power surges and disruptive line noise transferred through the electrical wall outlet. A surge protector may have a long power cord or it may plug directly into the wall, and it usually has multiple outlets for connecting equipment. Some surge protectors also include protection for phone/modem lines, network (Ethernet) connections, and coaxial connections for cable, antenna, or satellite TV reception.