Worst (max) CAL over the 2 mid sites (B/L) — the 2017 primary-case definition's buccal/oral fallback criterion.
Worst (max) CAL over the 4 approximal sites (MB/DB/ML/DL). 0 if none charted — the pure function cannot distinguish "charted as 0" from "never charted"; both read as "no interdental attachment loss here".
Worst (max) raw probing depth recorded anywhere on the tooth (any of the 6 sites) — used by the stage-III complexity escalation.
Whether this FDI position is a real, present tooth (not missing, not
an implant) — mirrors isToothPresent() in odontogram.ts.
Per-tooth inputs the derivation needs — already reduced from the raw per-site CAL/PD data (the adapter in
odontogram.tsdoes that reduction).