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Periodontal inflamed surface area (PISA) system and components: Potential for exploring the periodontal systemic
Sabrina C Gomes1,2, Kathleen Hovey3, Michael LaMonte3
1Department of Periodontology, Dental School, Federal University of Rio Grande do Sul, Rio Grande do Sul, Brazil.
Journal of Periodontology
|July 1, 2026
Summary
The periodontal inflamed surface area (PISA) is not a reliable tool for assessing periodontal disease and systemic inflammation. Gingival bleeding extent correlates better with C-reactive protein than PISA.
Area of Science:
- Periodontology
- Systemic Inflammation
- Biomarker Correlation
Background:
- Periodontal disease poses a significant inflammatory burden.
- The Periodontal Inflamed Surface Area (PISA) quantifies this burden.
- Investigating the periodontal-systemic interface is crucial for understanding disease links.
Purpose of the Study:
- To evaluate the Periodontal Inflamed Surface Area (PISA) as a tool for assessing periodontal inflammation.
- To determine the correlation between PISA and systemic inflammation markers, specifically C-reactive protein (CRP).
- To compare PISA's effectiveness with other periodontal measures in reflecting systemic inflammation.
Main Methods:
- Utilized data from the Buffalo OsteoPerio cross-sectional study (n=713 post-menopausal women).
- Measured full-mouth periodontal probing depth (PPD), clinical attachment loss (CAL), and marginal bleeding (MB).
- Assessed serum and saliva C-reactive protein (CRP) levels.
Main Results:
- Increased severity of periodontitis correlated with higher MB, CAL, PPD, PISA, and CRP levels.
- PISA showed weak correlations with both saliva and serum CRP.
- Marginal bleeding extent demonstrated a more consistent, albeit weak, correlation with CRP compared to PISA.
Conclusions:
- Marginal bleeding extent correlates more consistently with C-reactive protein than PISA.
- PISA is not supported as a clinical tool for evaluating periodontal inflammation's systemic interface.
- Gingival bleeding extent may be a more practical indicator for exploring the periodontal-systemic link.
