Dentists are taught to save teeth. Cavities in teeth are caused by bacteria eroding away the enamel and dentine. At this stage, the decayed portion of the tooth can be drilled away and the resultant defect filled with an inert material such as amalgam or increasingly, tooth colored composites. If the decay had progressed deeper into the pulp of the tooth, root canal treatment, aka endodontic treatment, whereby the pulpal tissue is removed from the root canals of the tooth and then sealing the empty canals with a filling, can often save the tooth from extraction. However, if the decay has progressed even further as to leave minimal sound tooth structure, extraction may be the only choice left. This is where dental implant come in as a replacement for the missing tooth. Where do we draw the line as to when it is better to remove and replace than to salvage the tooth?