CPITN Calculator

CPITN actual six-sextant0–4code inventory and highest known code, not numeric sum. Excluded/untestable sextants represented as unknown, furcation*context separately assessed. Actual scoring/probe/version external, no periodontal diagnosis or automatic treatment need.

Description

Periodontal sextant codes summarize qualified findings under a declared instrument.

Periodontal sextant codes summarize qualified findings under a declared instrument.^[1]

The highest known code retains unassessed sextants as a separate uncertainty list. Use this tool to calculate the stated observation or conditional model from supplied measurements.

When to use CPITN Calculator

Use this tool to calculate the stated observation or conditional model from supplied measurements. Establish the qualified examination or measurement context, matching instrument/protocol edition, site order and units.

How to use CPITN Calculator and understand its results

Establish the qualified examination or measurement context, matching instrument/protocol edition, site order and units.
Enter independentlyCodedSextantScores, sextantEvidenceKnownFlags, using the field meanings and rules below, then run the tool.
Read result.highestKnownSextantCode, result.knownSextantScores, result.unknownSextantIndices. Interpret each field using the units, signs and evidence rules below.
If input validation fails, correct the reported field and run again. Before applying a successful result, check the stated reference scope, units, assumptions and any retained unknown evidence.

Input field	Meaning	Value type	Requirement
independentlyCodedSextantScores	Independently coded sextant scores	list of number	Required
sextantEvidenceKnownFlags	Sextant evidence known flags; 1 means known and 0 means unknown; keep the same item order	list of number	Required

Enter exactly six aligned integer sextant codes 0–4 and binary known flags. Validate unknown placeholder codes too; require at least one known sextant. Return the maximum known code, known codes in caller order and zero-based unknown indices. No clinical grade is inferred from measurements and no treatment need is assigned.

highestKnownCode=max(code_i where known_i=1); knownCodes=ordered known subset

Apply the field units and exact ordering, boundary and evidence rules above.

Output field	Meaning	Value type
result	Structured result containing the calculation or selected reference fields below	object
result.highestKnownSextantCode	Largest known sextant code; no treatment category is inferred	number
result.knownSextantScores	Known sextant codes in their original order	list of number
result.unknownSextantIndices	Zero-based positions of unknown sextants	list of values

json

{
  "input": {
    "independentlyCodedSextantScores": [
      0,
      1,
      2,
      3,
      4,
      0
    ],
    "sextantEvidenceKnownFlags": [
      1,
      1,
      1,
      1,
      1,
      1
    ]
  },
  "output": {
    "result": {
      "highestKnownSextantCode": 4,
      "knownSextantScores": [
        0,
        1,
        2,
        3,
        4,
        0
      ],
      "unknownSextantIndices": []
    }
  }
}

Limitations and assumptions

The highest known code retains unassessed sextants as a separate uncertainty list. Results depend on the independently established measurement basis and the exact model assumptions above.

Every listed input requires an explicit value. Unexpected fields, incorrect value types, nonfinite numbers and sparse numeric arrays fail validation; tool-specific bounds and alignment rules apply as described above. Extremely large inputs or outputs can also be rejected. An input error is distinct from a successful calculation that reports a false comparison or retains unknown evidence.

Alternative or Complementary methods

Use BPE Score Calculator to examine a related aspect: BPE records periodontal findings in six sextants under defined criteria.

Use Average Probing Pocket Depth Calculator where its separate inputs and scope apply: Mean probing depth summarizes independently measured periodontal sites.

References

CPITN Calculator — tool.io

Similar or alternative tools

BPE Score Calculator
BPE records periodontal findings in six sextants under defined criteria.
Average Probing Pocket Depth Calculator
Mean probing depth summarizes independently measured periodontal sites.