These are similar to the metal wire contraptions, but are fitted to the inside of the teeth – so no one will notice (except you, because they can be rather uncomfortable). The plus on these is that they can be used in severe cases of misalignment, unlike the invisible option. The minus is that it can take longer.
Source: http://www.dentistry.com/
Here we have a cross between the traditional metal braces and the Invisalign system. It consists of removable aligners, but some (visible) metal is also used. They work faster than Invisalign and you only have one set for the entire treatment time so it is cheaper.
Source: http://www.dentistry.com/
Also known as indirect fillings, inlays and onlays made from porcelain or composite materials are a long-lasting yet cosmetic way to provide a “filling” to teeth with tooth decay or similar structural damage. Whereas dental fillings are molded into place within the mouth during a dental visit, inlays and onlays are created in a dental laboratory before being fitted and adhesively bonded into place by your dentist.
Source: http://www.yourdentistryguide.com