{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,28]],"date-time":"2026-10-28T02:46:55Z","timestamp":1793155615872,"version":"4.5.0"},"reference-count":177,"publisher":"Frontiers Media SA","license":[{"start":{"date-parts":[[2026,4,29]],"date-time":"2026-04-29T00:00:00Z","timestamp":1777420800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":["frontiersin.org"],"crossmark-restriction":true},"short-container-title":["Front. Oral Health"],"abstract":"<jats:sec>\n                    <jats:title>Background<\/jats:title>\n                    <jats:p>Periodontitis and peri-implantitis are chronic, immune-mediated inflammatory diseases characterized by progressive destruction of tooth- and implant-supporting tissues. Although microbial dysbiosis initiates these conditions, accumulating evidence indicates that host-derived oxidative stress plays a central role in amplifying inflammation, impairing tissue repair, and driving irreversible bone loss. Excessive production of reactive oxygen species (ROS) disrupts redox homeostasis, induces molecular damage, and activates redox-sensitive signaling pathways that perpetuate tissue destruction.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Objective<\/jats:title>\n                    <jats:p>This narrative review synthesizes current mechanistic, clinical, and translational evidence on the role of oxidative stress and antioxidant defense systems in the pathogenesis of periodontitis and peri-implantitis. It further aims to critically evaluate redox-regulated molecular pathways, emerging diagnostic biomarkers, and antioxidant-based therapeutic strategies.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods<\/jats:title>\n                    <jats:p>A structured literature search was conducted using PubMed, Scopus, and Web of Science, focusing on recent experimental, clinical, and translational studies. Articles were selected based on relevance, methodological rigor, and translational applicability, with emphasis on studies addressing oxidative stress mechanisms, biomarker validity, and therapeutic interventions.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>Evidence indicates that excessive ROS generation activates key redox-sensitive signaling pathways, including NF-\u03baB, MAPKs, and AP-1, leading to sustained cytokine production, matrix metalloproteinase activation, mitochondrial dysfunction, and enhanced osteoclastogenesis. Concurrent impairment of endogenous antioxidant systems further exacerbates tissue vulnerability. Oxidative stress biomarkers\u2014such as malondialdehyde, 8-hydroxy-2\u2032-deoxyguanosine, and protein carbonyls\u2014demonstrate associations with disease severity and treatment response; however, their clinical utility is limited by methodological heterogeneity and lack of standardization. Antioxidant-based interventions, including systemic supplementation, local delivery systems, nano-formulations, and antioxidant-enriched biomaterials, show promising adjunctive effects, although clinical outcomes remain variable due to differences in bioavailability, dosage, and patient-specific factors.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusion<\/jats:title>\n                    <jats:p>Oxidative stress represents a central, disease-modifying axis in periodontitis and peri-implantitis. Targeting redox imbalance offers a biologically grounded framework for improving diagnostics, risk stratification, and host-modulatory therapy. However, translation into clinical practice requires standardized biomarker validation and rigorously designed, biomarker-guided clinical trials. Future strategies integrating redox biology with advanced delivery systems and precision medicine approaches may significantly enhance periodontal and peri-implant care.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.3389\/froh.2026.1814823","type":"journal-article","created":{"date-parts":[[2026,4,29]],"date-time":"2026-04-29T06:01:56Z","timestamp":1777442516000},"update-policy":"https:\/\/doi.org\/10.3389\/crossmark-policy","source":"Crossref","is-referenced-by-count":11,"title":["Oxidative stress and antioxidant pathways in the pathogenesis of periodontitis and peri-implantitis: mechanistic insights and therapeutic potentials"],"prefix":"10.3389","volume":"7","author":[{"given":"Nada Tawfig","family":"Hashim","sequence":"first","affiliation":[{"name":"Department of Periodontics, RAK College of Dental Sciences, RAK Medical & Health Sciences University","place":["Ras-AlKhaimah, United Arab Emirates"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Rasha","family":"Babiker","sequence":"additional","affiliation":[{"name":"Department of Physiology, RAK College of Medical Sciences, RAK Medical & Health Science University","place":["Ras-AlKhaimah, United Arab Emirates"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Vivek","family":"Padmanabhan","sequence":"additional","affiliation":[{"name":"Department of Pediatric and Preventive Dentistry, RAK College of Dental Sciences, RAK Medical & Health Sciences University","place":["Ras-AlKhaimah, United Arab Emirates"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Md Sofiqul","family":"Islam","sequence":"additional","affiliation":[{"name":"Department of Operative Dentistry, RAK College of Dental Sciences, RAK Medical and Health Sciences University","place":["Ras-AlKhaimah, United Arab Emirates"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Nallan C. 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