A crown is a type of cap that completely covers a real tooth. It's made from either metal, or porcelain and metal, and is fixed in your mouth.Crowns can be fitted where a tooth has broken, decayed or been damaged, or just to make a tooth look better. To fit a crown, the old tooth will need to be drilled down so it's like a small peg the crown will be fixed on to.
A bridge is a fixed replacement for a missing tooth or teeth. It's made by taking an impression of the surrounding teeth, which will eventually support the bridge.A bridge is usually created from precious metal and porcelain and will be fixed in your mouth unlike dentures, which can be removed.

Implants are a fixed alternative to removable dentures.You can use implants to replace just a single tooth or several teeth.
To fit an implant, titanium screws are drilled into the jaw bone to support a crown, bridge or denture.A dental implant is a metal post that replaces the root portion of a missing tooth. An artificial tooth (crown) is placed on an extension of the post (abutment) on the dental implant, giving you the look of a real tooth.