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c. Arrangement of projections (cusps): 9, 19, 31
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0. |
indeterminate 9, 19
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1. |
widely spaced 9, 19
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2. |
close together 9, 19
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d. Shape of base (root) from which cusps arise: 9, 19, 31
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0. |
indeterminate 9, 19
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1. |
none of the following 9, 19
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2. |
elongate and bar-shaped 9, 19
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3. |
flat and plate-like 9, 19
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4. |
circular to subcircular in outline, but not flattened 9, 19
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5. |
thick and polygonal 9, 19
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6. |
curved 9, 19
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7. |
circular to subcircular and flat with a button-like process 19
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8. |
circular to subcircular and thick with a button-like process 19
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9. |
flat and star-shaped 19
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e. Shape of projections (cusps): 9, 19, 31
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0. |
indeterminate 9, 19
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1. |
triangular, not curved 9, 19
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2. |
triangular, curved lingually 9, 19
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3. |
triangular, curved laterally (mesially or distally) 9, 19, 31
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4. |
broad and blunt 9, 19 |
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5. |
none of the above 19 |
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f. Number of projections (cusps) 9, 19, 31
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Recorded as number 19
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g. Position of projections (cusps) 9, 19, 31
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0. |
indeterminate 9, 19
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1. |
linearly arranged 9, 19
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2. |
not linearly arranged 9, 19
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h. In linear forms, geometry of cusps 9, 19, 31
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0. |
indeterminate or none of the following 31, 32
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1. |
cusps of different sizes with no order to their distribution 9, 19
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2. |
medial cusp with lateral cusps decreasing in size from medial cusp to edge of element; symmetrical 9, 19
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3. |
medial cusp with smaller lateral cusps, one of lateral cusps larger than lateral cusp nearest medial cusp; symmetrical 9, 19
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4. |
posterior cusp largest, succeeding anterior cusps decreasing in size; asymmetrical 9, 19
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5. |
medial cusp smaller than lateral cusps; symmetrical 9, 19
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i. Crown labial surface features 31
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0. |
indeterminate 31
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1. |
absent (smooth) 31, 32
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2. |
lines or ridges multiple (greater than number of cusps), long (greater than 1/2 height of crown), and approximately vertical 31, 32
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3. |
lines or ridges multiple (greater than number of cusps), short (less than 1/2 height of crown), and approximately vertical 31, 32
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4. |
lines or ridges few (same as or less than number of cusps), long (greater than 1/2 height of crown), and approximately vertical 31, 32
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5. |
lines or ridges few (same as or less than number of cusps), short (shorter than 1/2 height of crown), and approximately vertical 31, 32
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6. |
one node below each cusp on crown shoulder 31, 32
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7. |
more than one node below each cusp on crown shoulder 31, 32
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8. |
prominent peg (protrusion) on crown shoulder below principal cusp 31, 32
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9. |
rounded protrusion (not prominent peg) on crown shoulder below principal cusp 31, 32
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10. |
Longitudinal line(s) or ridge(s) on and traversing lower crown shoulder, may be networked, may be discontinuous 31, 32
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j. Crown lingual surface features. Refer to
characteristics: "i" 0 to 10 (above) 31
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