React Advanced Odontogram - v2.6.0
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    Variable PROGRESSION_MMConst

    PROGRESSION_MM: 2

    Millimetres of change that count as real movement rather than measurement noise. Probing is reproducible to about ±1 mm between visits and examiners, so 2 mm is the threshold the periodontal literature uses for attachment loss/gain — and the one the 2017 classification's own progression reasoning rests on. Exported so a caller can report on its own threshold instead.