Crowns
A crown (sometimes referred to as a cap) is a full coverage restoration that restores the anatomical surfaces of a damaged or fractured tooth to their original contour and function.A dental crown may be needed when at least one of the following occurs:
· To protect a weak tooth (for instance, from decay) from breaking or to hold together parts of a cracked tooth
· To restore an already broken tooth or a tooth that has been severely worn down
· To cover and support a tooth with a large filling when there isn’t a lot of tooth left
· To hold a dental bridge in place
· To cover mis-shaped or severely discolored teeth
· To cover a dental implant
There are also a host of different materials you can choose from for your dental crowns. The most popular ones are:
Metals – These could include gold alloy and other base metal alloys. Metal dental crowns are by far the toughest. They can withstand daily wear and tear and they rarely break or chip. The only real drawback is that they look like metal and not a naturally white tooth.
Porcelain – These have most of the structural strength of a metal dental crown but the porcelain aspect of them makes sure that they look like a normal tooth. Of course the porcelain is slightly more prone to chipping, but they are still tough.
All Resin – These are the least expensive for crowns. Naturally, though like most inexpensive things they do not last as long as other types of crowns.
All Porcelain – These are the best looking crowns, and probably the best bet for your money. You have more strength than the resin based, much of the strength of the metal crowns, but they look like real teeth.

Bridges
Every tooth in your mouth provides support, structure and function to the jaw. Absence of even a single tooth can cause the adjacent teeth to drift into the position of the missing tooth. Sometimes only the roots will drift causing pressure on neighbouring teeth and reducing the support of other teeth. This drifting is only evident on a dental x-ray.
A bridge is a dental prosthesis that is used to replace one or more missing teeth in the same arch. A bridge is permanently cemented into the mouth; therefore, you cannot remove it. It provides solid support to the structure of the jaw and prevents adjacent teeth from shifting.

Dentures
A denture is a removable, artificial replacement for all of your missing teeth in one arch. It is made of acrylic with plastic or porcelain teeth attached to it.

Partials
A partial is a removable appliance, which replaces some missing teeth. It stays in place by attaching to the remaining teeth.