Permanent teeth Permanent teeth Permanent teeth or adult teeth are the second set of teeth formed in diphyodont mammals. In humans and old world simians, there are thirty-two permanent teeth, consisting of six maxillary and six mandibular molars, four maxillary and four mandibular premolars, two maxillary and two mandibular canines, four maxillary and four mandibular incisors. The first permanent tooth usually appears in the mouth at around six years of age, and the mouth will then be in a transition time with both primary (or deciduous dentition) teeth and permanent teeth during the mixed dentition period until the last primary tooth is
Dragon's teeth (fortification) those formed after the breakup of Yugoslavia, have movable teeth, positioned at roadsides at strategic locations, which are to be lifted and placed on the roads. Some stages of Rallye Deutschland, the German round of the WRC rally championship, are run on roads belonging to the military training ground at Baumholder. The roads are lined with dragon's teeth, known as 'Hinkelsteine'. They usually serve as obstacles to prevent tanks from leaving the roads, and cause devastation to any rally car which veers off track. Notes Dragon's teeth (fortification) Dragon's teeth () are square-pyramidal fortifications of reinforced concrete first used during