Overdentures is the name given to the restoration dentures that are used to be secured on top of the dental implants you would of previously had placed. They are a secure way to replace full sets of missing teeth.
When it comes to dentistry this is a very controversial topic that has drawn a lot of attention from the media in the past. The reason why this is controversial is because of what is contained in the old amalgam fillings that have been commonly placed in the past. They are not very commonly used any more, as the preferred option tends to be white fillings.