Code 0:
The colored area of the probe remains completely visible in the deepest crevice of the sextant. There is no calculus or defective margins detected. The gingival tissues are healthy with no bleeding after gentle probing.
Code 1:
The colored area of the probe remains completely visible in the deepest probing depth in the sextant. There is no calculus or defective margins detected. However, there is bleeding after probing.