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Автор: Administrator   

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17.07.2014 13:04

Анатомия клыков

Клык верхней челюсти (рис. 1) имеет коронку неправильно-конусовидной формы. Режущий край напоминает по виду треугольник, ограниченный тремя зубчиками — двумя крайними и одним средним, хорошо выраженным. Бугор имеет два ската, медиальный скат меньше латерального. Вестибулярная поверхность выпуклая, имеет продольный валик, который делит губную поверхность на две фасетки, из которых латеральная больше.

Клык верхней челюсти левый

Язычная поверхность выпуклая, также разделена на две фасетки. Продольные эмалевые валики обеих поверхностей коронки переходят в режущий бугор. Боковые грани образуют с режущим краем два угла, из которых медиальный более тупой, чем латеральный. Контактные поверхности имеют форму треугольника. Корень слегка сжат с боков. Латеральная его поверхность более выпукла, чем медиальная. Хорошо выражены все три признака.

Клык нижней челюсти (рис. 2).

Клык нижней челюсти левыйПо строению напоминает верхний, но несколько короче и меньше. Коронка, частично сохраняя ромбическую форму, более узкая и удлиненная. Вестибулярная поверхность выпуклая, язычная — плоская и слабовогнутая. На режущем крае выделяется центральный режущий главный бугорок, в области которого сходятся грани коронки. Медиальная часть короче латеральной. Медиальный угол острый и расположен дальше от шейки. От главного бугорка в сторону премоляра идет небольшая вырезка, отделяющая медиальный бугорок. Высота коронки вестибулярной и латеральной поверхностей несколько превышает высоту язычной и медиальной поверхностей. Корень один, короче, чем у верхнего клыка. На боковых поверхностях глубокие продольные бороздки. На поперечном распиле овальной формы. Хорошо выражены все три признака.


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