ArticleClinical oral implants research2026
Peri-Implant Crevicular Fluid Analysis by Mid-Infrared Spectroscopy in Peri-Implantitis-A Pilot Study.
Article in Clinical oral implants research, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
objectivesThis study aimed to assess biochemical differences in peri-implant crevicular fluid (PICF) using ATR-FTIR spectroscopy and multivariate analysis, through a between-participant comparison of healthy and peri-implantitis (PI) sites, and a within-participant comparison of PI-PICF and GCF from contralateral periodontal healthy teeth. MATERIALS AND
methodsSamples were categorized into three groups based on peri-implant status and sampling site: PICF from peri-implant healthy sites, PICF from PI-affected sites, and GCF from contralateral healthy teeth in PI patients, with n = 20/group. Samples were collected and analyzed through ATR-FTIR spectroscopy. Chemometric models were applied for cluster/outlier identification and discrimination. Regression coefficient vectors of PLS-DA models identified key spectral differences between groups.
resultsA total of 40 implants were analyzed; participants had a mean age of 62 years, predominantly female (59%), non-smokers (88%), and most received regular maintenance therapy (82%). PCA revealed subtle cluster formations without clear group separation. Comparing PICF from patients with and without PI, the most important wavenumbers for the PLS-DA model were within 1700-1680 cm
conclusionsFTIR-spectroscopy combined with chemometric modeling effectively discriminates peri-implant health and PI in both inter- and intra-subject comparisons. Higher within-subject accuracy supports FTIR's potential as a site-specific, non-invasive diagnostic tool for peri-implantitis.
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