The DOI matches its Crossref record; 1 of the 1 references it cites were found in a registry or an index.
The Periodontal Disease Index (PDI)
Open accessAbstract
Peer Reviewed
Overview
The claims and statistics of this paper haven’t been checked yet.
Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.
Integrity signals
Registry
Cites
Statistics
Verification
Claims the paper makes
The claims and statistics of this paper haven’t been checked yet.
Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.
Self-check
Percentages, sums and reported differences re-computed from the paper’s own numbers.
The self-check needs the paper’s full text.
Citations
Cites
Indices for Prevalence and Incidence of Periodontal Disease
Ramfjord, S. P. (1959) · The Journal of Periodontology · doi:10.1902/jop.1959.30.1.51 · Cited by 1,075
Self-citation
Cited by
Prevalence of Periodontal Disease in Insulin-Dependent Diabetes Mellitus (Juvenile Diabetes)
Cianciola, L. J., Park, B. H., Bruck, E., Mosovich, L., & Genco, R. J. (1982) · The Journal of the American Dental Association · doi:10.14219/jada.archive.1982.0240 · Cited by 401
The Effectiveness of Subgingival Scaling and Root Planing in Calculus Removal
Rabbani, G. M., Ash, M. M., & Caffesse, R. G. (1981) · Journal of Periodontology · doi:10.1902/jop.1981.52.3.119 · Cited by 349
Armitage, G. C., Dickinson, W. R., Jenderseck, R. S., Levine, S. M., & Chambers, D. W. (1982) · Journal of Periodontology · doi:10.1902/jop.1982.53.9.550 · Cited by 285
Effect of crown margins on periodontal conditions in regularly attending patients
Bader, J. D., Rozier, R. G., McFall, W. T., & Ramsey, D. L. (1991) · The Journal of Prosthetic Dentistry · doi:10.1016/0022-3913(91)90053-y · Cited by 122
Brand, V., Bray, K., MacNeill, S., Catley, D., & Williams, K. (2013) · International Journal of Dental Hygiene · doi:10.1111/idh.12012 · Cited by 83
Metadata
- Authors
- Ramfjord, S. P.
- Venue
- The Journal of Periodontology
- Publisher
- Wiley
- Published
- 1967-11
- Volume
- 38
- Issue
- 6
- Pages
- 602-610
- ISSN
- 0022-3492 (ISSN-L)
- 1049-8885
- OpenAlex
- W2009317538
- Cited by
- 453
- References
- 1
- FWCI
- 1.48
- Type
- journal article
- Language
- en
- Open access
- green
About these checks
Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.
Statistics and arithmetic are recomputed, not judged.
Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.
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How to cite
Cite CoChat for the checks on this page, and the paper for its own findings.
- This page
- CoChat. (2026). Citation check: The Periodontal Disease Index (PDI). https://app.cochat.ai/papers/10.1902/jop.1967.38.6.602
- The paper
- Ramfjord, S. P. (1967). The Periodontal Disease Index (PDI). The Journal of Periodontology. https://doi.org/10.1902/jop.1967.38.6.602
Data sources
Bibliographic data: Semantic Scholar, OpenAlex, Crossref.
Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.
