BOSSERT, WALTER A.: Dental Division, Metropolitan Life Insurance Com­pany, New York City (May 5, 1938).

Susceptibility or non-susceptibility of occlusal surfaces, in both deciduous and permanent molars, has been established through observations of the rela­tive angulation of the cusps to one another. Teeth with deep valleys and high cusps show the greatest susceptibility to caries ; the ” flatter ” teeth, or those with shallow valleys and low cusps, are relatively non-susceptible.

References: J. Den. Res., 13, 125, 1933 ; 16, 63, 1937.

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