尖顶
Apex cuspidis
定义
A cusp is an occlusal or incisal eminence on a tooth. Canine teeth, otherwise known as cuspids, each possess a single cusp, while premolars, otherwise known as bicuspids, possess two each. Molars normally possess either four or five cusps. In certain populations the maxillary molars, especially first molars, will possess a fifth cusp (accessory cusp) situated on the mesiolingual cusp known as the Cusp of Carabelli.
牙尖是牙齿上的咬合面或切缘隆突。尖牙，又称单尖牙，每颗各具一个牙尖；前磨牙，又称双尖牙，每颗各具两个牙尖。磨牙通常具有四个或五个牙尖。在某些人群中，上颌磨牙，尤其是第一磨牙，会在近中舌尖上出现第五个牙尖（副尖），即卡氏尖（Cusp of Carabelli）。
參考資料
This definition incorporates text from a public domain edition of Gray's Anatomy (20th U.S. edition of Gray's Anatomy of the Human Body, published in 1918 – from http://www.bartleby.com/107/).
