CPI score periodontal
- Created by
- Renato Passos, Eng. de Software
- Reviewed by
- Renato Passos, Eng. de Software
Last updated: Apr 18, 2026
About this calculator
The CPI (Community Periodontal Index) is a tool used to assess the health of gums and tooth-supporting structures. The periodontal CPI score calculator evaluates the six dental sextants (divided by imaginary lines) and assigns a score from 0 to 4 for each, indicating the severity of potential gum issues. The final score corresponds to the worst sextant, helping identify areas at higher risk for periodontal diseases.
Scores range from 0 (healthy gums) to 4 (advanced loss of tooth anchoring). The tool follows clinical criteria established by the World Health Organization (WHO), such as calculus presence, bleeding, periodontal pockets, and tooth mobility. While not a substitute for dental evaluation, it aids patients in understanding when professional intervention is necessary.
Use this calculator during preventive dental checkups or to monitor periodontal health over time. It is particularly useful for early detection of gingivitis or periodontitis symptoms, enabling dentists to plan personalized treatments. However, direct clinical analysis remains crucial for accurate diagnoses.
Frequently asked questions
What does each CPI score mean?
0 = healthy gums; 1 = mild bleeding; 2 = detectable calculus; 3 = periodontal pocket; 4 = advanced anchoring loss.
How is the CPI index applied in practice?
A dentist examines each sextant, assigning the worst score. The final score reflects the most severe condition among sextants.
Who should use the CPI calculator?
Patients during preventive checkups and dental professionals for risk screening of periodontal diseases.
Are there limitations to this tool?
Yes. The CPI does not replace detailed exams, such as X-rays or periodontal probing, required for complete diagnoses.
How accurate is the CPI calculator?
Its accuracy depends on the professional's assessment. Without specialized expertise, risks may be underestimated or overestimated.