Place · Level 3 · Systems
Periodontium
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In one pass The shallow groove between tooth and gum is normally held by neutrophils and complement, with a mixed community doing its jobs. Educational content, not medical advice — consult a clinician.
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Chapter 1
The sulcus is a niche
牙龈沟是一个生态位
The shallow groove between tooth and gum is normally held by neutrophils and complement, with a mixed community doing its jobs. Once the groove deepens, oxygen falls and anaerobes have a place to live. This island is not simply whether you brushed. It is who pries that groove open.
Hajishengallis 2015 turns the old model over: periodontitis is not a few classic periopathogens acting alone. It is a community in which different members play different roles that converge to feed destructive inflammation. The fluoride island covers enamel mineral. This island covers the soft tissue in front of the periodontal ligament and the bone.
Hajishengallis 2015 turns the old model over: periodontitis is not a few classic periopathogens acting alone. It is a community in which different members play different roles that converge to feed destructive inflammation. The fluoride island covers enamel mineral. This island covers the soft tissue in front of the periodontal ligament and the bone.
Chapter 2
A keystone pathogen turns the guard
钥匙菌把守卫调开
Hajishengallis writes Porphyromonas gingivalis as the best-documented keystone pathogen: it need not be abundant. TLR2 ligands plus gingipains with C5-convertase-like activity raise local C5a, neutrophils are turned, killing fails and inflammation stays. Protein leaking from that inflammation is food for the community.
So the loop is counter-intuitive: inflammation is not only failed defence. It is kept as a nutrient source. Writing periodontitis as you did not brush takes this key out of the explanation.
So the loop is counter-intuitive: inflammation is not only failed defence. It is kept as a nutrient source. Writing periodontitis as you did not brush takes this key out of the explanation.
Chapter 3
Inflammation in the groove can enter blood
沟里的炎能进血
The ulcerated surface in the groove gives bacteria and fragments a daily chance to enter the circulation. Sanz 2020, the EFP/World Heart Federation consensus, writes severe periodontitis and cardiovascular disease as independently associated. Candidate mechanisms are bacteraemia plus systemic inflammation, not a slogan that a dirty mouth wrecks the heart.
The consensus also covers the impact of periodontal therapy on cardiovascular endpoints and surrogates — there is a signal, not a menu that a cleaning equals fewer infarcts. This scene only draws the leak from groove to blood. Diagnosis and surgery stay with the dentist.
The consensus also covers the impact of periodontal therapy on cardiovascular endpoints and surrogates — there is a signal, not a menu that a cleaning equals fewer infarcts. This scene only draws the leak from groove to blood. Diagnosis and surgery stay with the dentist.
Chapter 4
Not a detox massage
不是排毒按摩
What you can draw is one sentence: a keystone pathogen turns neutrophils aside, the community feeds on inflammation, and leaked inflammation can be measured in blood. Lymphatic 'detox' massage is not on this chain — the lymphatic island already covered transport, not flushing bacteria out of the sulcus.
Fluoride protects enamel; this island protects the groove. Both matter. Do not merge them into oral care equals detox.
Fluoride protects enamel; this island protects the groove. Both matter. Do not merge them into oral care equals detox.
References · 2
- Hajishengallis, G. (2015). Periodontitis: from microbial immune subversion to systemic inflammation. Nature Reviews Immunology, 15(1), 30-44. Periodontitis is a dysbiotic inflammatory disease. A polymicrobial community, not a few classic periopathogens, subverts the host response; Porphyromonas gingivalis is the best-documented keystone pathogen. Local inflammation can mediate pathology at distant sites. 10.1038/nri3785
- Sanz, M., Marco del Castillo, A., Jepsen, S., Gonzalez-Juanatey, J. R., D'Aiuto, F., Bouchard, P., Chapple, I., Dietrich, T., Gotsman, I., Graziani, F., Herrera, D., Loos, B., Madianos, P., Michel, J. B., Perel, P., Pieske, B., Shapira, L., Shechter, M., Tonetti, M., Vlachopoulos, C., & Wimmer, G. (2020). Periodontitis and cardiovascular diseases: Consensus report. Journal of Clinical Periodontology, 47(3), 268-288. EFP/WHF workshop: independent associations between severe periodontitis and CVD, mechanistic links (bacteraemia, systemic inflammation), and the impact of periodontal therapy on cardiovascular and surrogate outcomes. 10.1111/jcpe.13189