The Tooth of Perfection

The Tooth of Perfection: Functional and Spatial Constraints on Mammalian Tooth Shape

Double-bladed Tool Forms

Three-dimensional model of two basic double-bladed tools in occlusion. The basic double-bladed tool has two blades each with 0º rake, 0º relief, 0º approach angle, and moves vertically. The blades on each tool are represented by red edges, and each blade occludes with a blade on another tool. Click on the lower tool to begin movement to illustrate occlusion between the tools. Full page Five of the shape parameters are altered: the angle of the leading and trailing surfaces, blade edge arrangement and tip and cusp sharpnesses (point parameters). A, B, C are Apices A, B and C respectively; LSA, leading surface angle; TSA, trailing surface angle. Full page

Derived double-bladed tool forms

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Alistair Evans, May 2003


Three-dimensional model of two basic double-bladed tools in occlusion. The basic double-bladed tool has two blades each with 0º rake, 0º relief, 0º approach angle, and moves vertically. The blades on each tool are represented by red edges, and each blade occludes with a blade on another tool. Click on the lower tool to begin movement to illustrate occlusion between the tools. Full page		Five of the shape parameters are altered: the angle of the leading and trailing surfaces, blade edge arrangement and tip and cusp sharpnesses (point parameters). A, B, C are Apices A, B and C respectively; LSA, leading surface angle; TSA, trailing surface angle. Full page