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Fin. JOC.
Kill, m:
Fio. IOC. A niosio-distiil soction of a lowor mohir looth fshowing the more usual directions
of tlio enamel rods in the different parts of the plane of the section.
Fid. 107. A perpendicular section through a cusp of a molar tooth showing the directions of
the enamel rods in its several parts. The recessional line .if tin- honi of the pulp is shown hy l\w
dotted line.
Fig. 1()S. Section across a deep fissure showing the more general relation of the direction of
the enamel rods to pits and fissures. This is an object lesson in the preparation of cavity walls.
The margrins of such fissures never chip or break before they are undennined by caries.
