{ "model": { "rank": 7079, "code": "thing-q520127", "model_id": "vr.tr.periodontitis", "name": "periodontitis", "purpose": "Let an agent explain periodontitis and its causes, forms and consequences in general terms, relay prevention and treatment information from dental bodies, describe links with general health, and route personal dental questions to professionals.", "family": "Thing Registry", "category": "Cross-cutting context", "status": "research-draft", "kind": "thing", "plane": "XCT", "domain": "XCT.STA", "industry": "", "version": "", "url": "/models/thing/q520127/", "tier": 2, "score": 57, "payload": { "layer": "wikidata", "aliases": [ "Hypotrichosis–acro-osteolysis–onychogryphosis–palmoplantar keratoderma–periodontitis syndrome", "Periodontitis as a manifestation of systemic disease", "gingival and periodontal pocket", "acute pericementitis", "aggressive periodontitis", "chronic periodontitis", "periodontal pocket" ], "aliasCount": 7, "merged": 7, "knownIn": 57, "facets": null, "markers": [], "lexicalClass": "", "senseRank": null, "alsoRegisteredAs": null, "source": { "dataset": "wikidata", "item": "Q520127", "url": "https://www.wikidata.org/wiki/Q520127", "license": "CC0 1.0" } }, "research": { "vercy": "1.0-draft", "publication": { "status": "research-draft", "adjudicationStatus": "unreviewed", "publishableCanonical": false, "generatedAt": "2026-09-12T05:41:24Z", "providers": [ "Claude" ], "breadth": "written by Claude from model knowledge without web access - no source was read, every claim is a lead to verify", "pass": 2, "wave": 2, "engine": "claude" }, "metaModel": { "id": "THING-Q520127", "registryId": "vr.tr.periodontitis", "name": "periodontitis", "version": "0.2.0-wave.2", "entryKind": "thing", "family": "Thing Registry", "domain": [ "XCT.STA" ], "status": "research-draft" }, "canonicalUrl": "https://ver.cy/models/thing/q520127/", "model": { "registry_id": "vr.tr.periodontitis", "name": "periodontitis", "purpose": "Let an agent explain periodontitis and its causes, forms and consequences in general terms, relay prevention and treatment information from dental bodies, describe links with general health, and route personal dental questions to professionals.", "definition": "A chronic inflammatory disease of the tissues supporting the teeth, in which bacterial plaque and the body response destroy the periodontal ligament and bone, forming pockets between gum and tooth and leading to loosening and loss of teeth, in chronic, aggressive and systemic-disease-related forms; periodontitis is common in adults, linked with diabetes, smoking and other conditions, and is prevented by oral hygiene and treated by professional cleaning, surgery and maintenance.", "what_it_is_for": "Chronic gum and bone disease around teeth.", "affordances": [ "explain causes and forms", "relay prevention and treatment information", "describe health links", "route personal questions" ], "distinguishing_features": [ "Bone and ligament loss", "Periodontal pockets", "Plaque-driven", "Systemic links" ], "appearance": "Receding, bleeding gums and loosening teeth.", "visual_identification": [ "Inflammatory destruction of tooth-supporting tissues", "Chronic, aggressive, systemic-related forms", "Gingivitis is reversible gum inflammation; tooth decay affects the tooth itself" ], "physical_properties": [], "families_and_kinds": [ "chronic periodontitis", "aggressive periodontitis", "periodontitis as a manifestation of systemic disease", "necrotising periodontal disease", "peri-implantitis" ], "related_models": [ { "relation": "is a kind of", "target": "periodontal disease", "why": "category" }, { "relation": "is related to", "target": "tooth", "why": "the structures affected" }, { "relation": "is related to", "target": "malocclusion", "why": "another dental condition" }, { "relation": "is related to", "target": "cigarette", "why": "smoking as a risk factor" } ], "identifiers": [], "standards_and_regulation": [ "Periodontal classification systems", "Dental clinical guidelines", "Dental professional regulation" ], "failure_modes_and_hazards": [ "Agents assessing personal gum disease", "Untreated progression to tooth loss", "Unproven remedies" ], "in_scope": [], "out_of_scope": [], "characteristics": [] }, "sources": [], "structure": { "bundles": [ { "id": "understand", "name": "Understand", "description": "What periodontitis is.", "rationale": "General information.", "layers": [ { "id": "concept", "name": "Concept", "description": "Concept and forms.", "findings": [ { "id": "concept-finding", "name": "Concept", "description": "Concept.", "questions": [ { "text": "What is periodontitis, how does it differ from gingivitis, and what forms exist?", "kind": "definition" }, { "text": "Is the user asking about their own gums, which needs a dentist?", "kind": "boundary" } ] } ] }, { "id": "causes", "name": "Causes", "description": "Causes and risk factors.", "findings": [ { "id": "causes-finding", "name": "Causes", "description": "Causes.", "questions": [ { "text": "What causes periodontitis, and what risk factors such as smoking and diabetes do dental bodies identify?", "kind": "provenance" }, { "text": "Which entry fits dental plaque?", "kind": "action" } ] } ] } ] }, { "id": "manage", "name": "Manage", "description": "Prevention and treatment.", "rationale": "Guidance.", "layers": [ { "id": "prevention", "name": "Prevention", "description": "Prevention.", "findings": [ { "id": "prevention-finding", "name": "Prevention", "description": "Prevention.", "questions": [ { "text": "What oral hygiene and check-up practices do dental bodies recommend to prevent periodontitis?", "kind": "provenance" }, { "text": "Which entry fits oral hygiene?", "kind": "action" } ] } ] }, { "id": "treatment", "name": "Treatment", "description": "Treatment.", "findings": [ { "id": "treatment-finding", "name": "Treatment", "description": "Treatment.", "questions": [ { "text": "How is periodontitis treated through professional cleaning, surgery and maintenance, in general terms?", "kind": "provenance" }, { "text": "Is the presentation free of unproven remedies?", "kind": "boundary" } ] } ] } ] }, { "id": "health", "name": "Health", "description": "General health links.", "rationale": "Attribution.", "layers": [ { "id": "links", "name": "Links", "description": "Systemic links.", "findings": [ { "id": "links-finding", "name": "Links", "description": "Links.", "questions": [ { "text": "What does research say about links between periodontitis and diabetes, heart disease and other conditions, with findings attributed?", "kind": "provenance" }, { "text": "Which findings are contested?", "kind": "boundary" } ] } ] }, { "id": "public", "name": "Public", "description": "Public health.", "findings": [ { "id": "public-finding", "name": "Public", "description": "Public.", "questions": [ { "text": "How common is periodontitis, and how do public health programmes address it?", "kind": "provenance" }, { "text": "Which entry fits dental public health?", "kind": "action" } ] } ] } ] }, { "id": "learn", "name": "Learn", "description": "History and teaching.", "rationale": "Education.", "layers": [ { "id": "history", "name": "History", "description": "History.", "findings": [ { "id": "history-finding", "name": "History", "description": "History.", "questions": [ { "text": "How has understanding and treatment of periodontal disease developed?", "kind": "provenance" }, { "text": "Which references are standard?", "kind": "provenance" } ] } ] }, { "id": "teach", "name": "Teach", "description": "Teaching.", "findings": [ { "id": "teach-finding", "name": "Teach", "description": "Teaching.", "questions": [ { "text": "How can periodontal health be taught?", "kind": "action" }, { "text": "Which misconceptions arise?", "kind": "provenance" } ] } ] } ] } ] }, "openQuestions": [ "Should gingivitis be a separate entry?", "How should dental guidelines be linked?", "How should research on systemic links be linked?" ], "statistics": { "bundles": 4, "layers": 8, "findings": 8, "questions": 16 } }, "draft": { "generator": "vr.draft.v3", "status": "draft-generated", "researched": false, "archetype": "disease or condition", "method": "Written from the archetype playbook - what this kind of thing needs beyond identity and provenance - and from the structure that recurred across 6,333 models already researched by two engines. Applied to this entry by rule. No source was read for this thing and no claim here is researched. This entry carries no facets of its own, so they were inferred from its domain - a guess about a whole domain applied to one thing.", "facetsInferred": true, "nextPass": "A researcher replaces this draft with a sourced specification. Treat every sentence below as a proposal to argue with.", "purpose": "Give an agent a durable, checkable way to recognise a periodontitis, record what state it is in, and decide what may be done with it.", "whatItIs": "Let an agent explain periodontitis and its causes, forms and consequences in general terms, relay prevention and treatment information from dental bodies, describe links with general health, and route personal dental questions to professionals.", "characteristics": { "substance": "abstract", "origin": "conceptual", "agency": "inert" }, "whatYouCanDoWithIt": [ "observed and measured" ], "distinguishingFeatures": [ "Names folded into this entry, which a task may need to split apart again: Hypotrichosis–acro-osteolysis–onychogryphosis–palmoplantar keratoderma–periodontitis syndrome, Periodontitis as a manifestation of systemic disease, gingival and periodontal pocket, acute pericementitis, aggressive periodontitis, chronic periodontitis, periodontal pocket.", "7 finer distinctions are held as aliases rather than separate entries, because telling them apart needs a task that asks for it.", "Described in 57 Wikipedia languages, which is a measure of how widely the thing is known, not of how important it is." ], "openQuestionsForResearch": [ "Which of the bundles below does a real task actually need, and which are ceremony?", "What does this thing have that the facets do not capture at all?", "Which neighbouring kind is most often confused with a periodontitis, and on what evidence are they told apart?" ], "whatItIsMadeOf": "an abstraction with no physical instance", "physicalCharacter": [ "Does nothing on its own; everything it does, something else did to it.", "These come from the domain this entry sits in rather than from the entry itself, so treat them as a first guess about the whole domain applied to one thing." ], "whatCanBeDoneWithIt": [ "observe it, measure it, record its state" ], "howItIsRecognised": [ "Recognised by criteria applied to signs and findings, not by appearance. Two conditions can look identical and be distinguished only by test." ], "relatedModels": [ { "relation": "covers", "note": "Finer kinds folded into this entry because telling them apart needs a task that asks for it. Each is a model waiting to be split out when one does.", "targets": [ "Hypotrichosis–acro-osteolysis–onychogryphosis–palmoplantar keratoderma–periodontitis syndrome", "Periodontitis as a manifestation of systemic disease", "gingival and periodontal pocket", "acute pericementitis", "aggressive periodontitis", "chronic periodontitis", "periodontal pocket" ] } ], "standing": "Described in 57 Wikipedia languages, which measures how widely it is written about rather than how important or how common it is. 7 finer distinctions are held inside this entry as names rather than as separate models.", "structure": { "bundles": [ { "id": "identity-and-classification", "name": "Identity, naming and classification", "description": "How an agent tells one periodontitis from another, and a periodontitis from things that resemble it.", "rationale": "Recognition comes before every other claim. Without stable identity nothing else in the model can be trusted to be about the same thing twice.", "layers": [ { "id": "naming-and-identifiers", "name": "Names and identifiers", "description": "The names this thing goes by and the identifiers that survive translation and time.", "findings": [ { "id": "preferred-name-and-aliases", "name": "Preferred name, aliases and local names", "description": "Which name to use, which names mean the same thing, and which merely sound similar.", "questions": [ { "id": "preferred-name-and-aliases-q01", "text": "What identifies and describes the name of a periodontitis, and in what units or vocabulary?", "kind": "definition", "answer_data": [ "identifiers", "types and classes", "values with units", "explicit unknowns" ] }, { "id": "preferred-name-and-aliases-q02", "text": "Who or what asserted this about the name of a periodontitis, by which method, and when was it true?", "kind": "provenance", "answer_data": [ "authority", "method", "evidence", "event time", "knowledge time" ] }, { "id": "preferred-name-and-aliases-q03", "text": "What may an agent decide or do once the name of a periodontitis is known, and what must it refuse?", "kind": "action", "answer_data": [ "permitted actions", "preconditions", "refusals", "escalation" ] } ] }, { "id": "stable-identifiers", "name": "Stable identifiers and external keys", "description": "Identifiers that keep pointing at this kind of thing across systems and languages.", "questions": [ { "id": "stable-identifiers-q01", "text": "What identifies and describes an identifier for a periodontitis, and in what units or vocabulary?", "kind": "definition", "answer_data": [ "identifiers", "types and classes", "values with units", "explicit unknowns" ] }, { "id": "stable-identifiers-q02", "text": "Who or what asserted this about an identifier for a periodontitis, by which method, and when was it true?", "kind": "provenance", "answer_data": [ "authority", "method", "evidence", "event time", "knowledge time" ] }, { "id": "stable-identifiers-q03", "text": "What may an agent decide or do once an identifier for a periodontitis is known, and what must it refuse?", "kind": "action", "answer_data": [ "permitted actions", "preconditions", "refusals", "escalation" ] } ] } ] }, { "id": "classification-and-granularity", "name": "Classification and granularity", "description": "Where a periodontitis sits among kinds, and how finely a task needs to cut it.", "findings": [ { "id": "kind-and-parents", "name": "Kind, parents and neighbouring kinds", "description": "The classes this thing belongs to and the ones it is next to.", "questions": [ { "id": "kind-and-parents-q01", "text": "What identifies and describes the kind of a periodontitis, and in what units or vocabulary?", "kind": "definition", "answer_data": [ "identifiers", "types and classes", "values with units", "explicit unknowns" ] }, { "id": "kind-and-parents-q02", "text": "Who or what asserted this about the kind of a periodontitis, by which method, and when was it true?", "kind": "provenance", "answer_data": [ "authority", "method", "evidence", "event time", "knowledge time" ] }, { "id": "kind-and-parents-q03", "text": "What may an agent decide or do once the kind of a periodontitis is known, and what must it refuse?", "kind": "action", "answer_data": [ "permitted actions", "preconditions", "refusals", "escalation" ] } ] }, { "id": "distinguishing-features", "name": "Distinguishing features", "description": "What separates a periodontitis from the things most often confused with it.", "questions": [ { "id": "distinguishing-features-q01", "text": "What identifies and describes what distinguishes a periodontitis, and in what units or vocabulary?", "kind": "definition", "answer_data": [ "identifiers", "types and classes", "values with units", "explicit unknowns" ] }, { "id": "distinguishing-features-q02", "text": "Who or what asserted this about what distinguishes a periodontitis, by which method, and when was it true?", "kind": "provenance", "answer_data": [ "authority", "method", "evidence", "event time", "knowledge time" ] }, { "id": "distinguishing-features-q03", "text": "What may an agent decide or do once what distinguishes a periodontitis is known, and what must it refuse?", "kind": "action", "answer_data": [ "permitted actions", "preconditions", "refusals", "escalation" ] } ] } ] } ] }, { "id": "state-and-lifecycle", "name": "State and lifecycle", "description": "The states a periodontitis passes through and the events that move it between them.", "rationale": "Most decisions about a thing depend on what state it is in now, which is a claim with a time on it, not a property.", "layers": [ { "id": "lifecycle-stages", "name": "Lifecycle stages", "description": "From coming into existence to ceasing to be one of these.", "findings": [ { "id": "stages-and-transitions", "name": "Stages and transitions", "description": "The stages worth naming and what moves a periodontitis between them.", "questions": [ { "id": "stages-and-transitions-q01", "text": "What identifies and describes the lifecycle of a periodontitis, and in what units or vocabulary?", "kind": "definition", "answer_data": [ "identifiers", "types and classes", "values with units", "explicit unknowns" ] }, { "id": "stages-and-transitions-q02", "text": "Who or what asserted this about the lifecycle of a periodontitis, by which method, and when was it true?", "kind": "provenance", "answer_data": [ "authority", "method", "evidence", "event time", "knowledge time" ] }, { "id": "stages-and-transitions-q03", "text": "What may an agent decide or do once the lifecycle of a periodontitis is known, and what must it refuse?", "kind": "action", "answer_data": [ "permitted actions", "preconditions", "refusals", "escalation" ] } ] } ] }, { "id": "observations-and-status", "name": "Observations and current status", "description": "What is observed about a periodontitis, how often and by whom.", "findings": [ { "id": "observation-record", "name": "Observation record", "description": "How an observation of a periodontitis is recorded so that it can be superseded rather than overwritten.", "questions": [ { "id": "observation-record-q01", "text": "What identifies and describes an observation of a periodontitis, and in what units or vocabulary?", "kind": "definition", "answer_data": [ "identifiers", "types and classes", "values with units", "explicit unknowns" ] }, { "id": "observation-record-q02", "text": "Who or what asserted this about an observation of a periodontitis, by which method, and when was it true?", "kind": "provenance", "answer_data": [ "authority", "method", "evidence", "event time", "knowledge time" ] }, { "id": "observation-record-q03", "text": "What may an agent decide or do once an observation of a periodontitis is known, and what must it refuse?", "kind": "action", "answer_data": [ "permitted actions", "preconditions", "refusals", "escalation" ] } ] } ] } ] }, { "id": "diagnosis-and-criteria", "name": "Diagnosis, criteria and coding", "description": "What makes a case of periodontitis a case, and under which revision.", "rationale": "Criteria change between revisions, so a diagnosis without its coding revision cannot be compared with a later one.", "layers": [ { "id": "criteria", "name": "Diagnostic criteria", "description": "The criteria in force and who issues them.", "findings": [ { "id": "criteria-record", "name": "Criteria, issuer and revision", "description": "What must be true for a diagnosis, according to whom.", "questions": [ { "id": "criteria-record-q01", "text": "What criteria define periodontitis, issued by which body, in which revision?", "kind": "definition" }, { "id": "criteria-record-q02", "text": "What changed between revisions that would reclassify existing cases?", "kind": "boundary" } ] } ] }, { "id": "coding", "name": "Coding and terminology", "description": "The codes used to record it and their mapping.", "findings": [ { "id": "coding-record", "name": "Codes and mappings", "description": "Which classification codes apply and how they map.", "questions": [ { "id": "coding-record-q01", "text": "Which classification and terminology codes cover periodontitis, and how do they map to each other?", "kind": "definition" }, { "id": "coding-record-q02", "text": "What is lost when a case is mapped from one scheme to another?", "kind": "boundary" } ] } ] } ] }, { "id": "course-and-population", "name": "Course, population and care", "description": "How periodontitis develops, whom it affects, and what is done about it.", "rationale": "The condition, the diagnosis and the episode of care are three different things, and an agent must not merge them.", "layers": [ { "id": "course", "name": "Course and stages", "description": "Onset, progression, remission and outcome.", "findings": [ { "id": "course-record", "name": "Stages and transitions", "description": "The stages recorded and what moves a case between them.", "questions": [ { "id": "course-record-q01", "text": "What course does periodontitis typically take, and what marks each stage?", "kind": "definition" }, { "id": "course-record-q02", "text": "What separates the condition itself from an episode of care for it?", "kind": "boundary" } ] } ] }, { "id": "population", "name": "Affected populations", "description": "Who is affected, how often, and on what evidence.", "findings": [ { "id": "epidemiology", "name": "Prevalence and its basis", "description": "Rates with their population, period and source.", "questions": [ { "id": "epidemiology-q01", "text": "What prevalence or incidence is reported for periodontitis, in which population and period?", "kind": "measurement" }, { "id": "epidemiology-q02", "text": "What may an agent not conclude about an individual from a population rate?", "kind": "action" } ] } ] } ] }, { "id": "provenance-and-evidence", "name": "Provenance, evidence and time", "description": "Where every claim about a periodontitis came from and when it held.", "rationale": "A claim without a source and a time cannot be superseded, only overwritten, and an agent that overwrites loses the ability to explain itself.", "layers": [ { "id": "source-and-authority", "name": "Source and authority", "description": "Who said it, on what evidence, and how strongly.", "findings": [ { "id": "claim-provenance", "name": "Claim provenance and confidence", "description": "The authority behind each claim about a periodontitis and how confident it is.", "questions": [ { "id": "claim-provenance-q01", "text": "What identifies and describes a claim about a periodontitis, and in what units or vocabulary?", "kind": "definition", "answer_data": [ "identifiers", "types and classes", "values with units", "explicit unknowns" ] }, { "id": "claim-provenance-q02", "text": "Who or what asserted this about a claim about a periodontitis, by which method, and when was it true?", "kind": "provenance", "answer_data": [ "authority", "method", "evidence", "event time", "knowledge time" ] }, { "id": "claim-provenance-q03", "text": "What may an agent decide or do once a claim about a periodontitis is known, and what must it refuse?", "kind": "action", "answer_data": [ "permitted actions", "preconditions", "refusals", "escalation" ] } ] } ] }, { "id": "time-and-versions", "name": "Time, versions and supersession", "description": "When a claim was true, when it was learnt, and what replaced it.", "findings": [ { "id": "validity-and-supersession", "name": "Validity period and supersession", "description": "How an old claim about a periodontitis is retired without being erased.", "questions": [ { "id": "validity-and-supersession-q01", "text": "What identifies and describes the validity of a claim about a periodontitis, and in what units or vocabulary?", "kind": "definition", "answer_data": [ "identifiers", "types and classes", "values with units", "explicit unknowns" ] }, { "id": "validity-and-supersession-q02", "text": "Who or what asserted this about the validity of a claim about a periodontitis, by which method, and when was it true?", "kind": "provenance", "answer_data": [ "authority", "method", "evidence", "event time", "knowledge time" ] }, { "id": "validity-and-supersession-q03", "text": "What may an agent decide or do once the validity of a claim about a periodontitis is known, and what must it refuse?", "kind": "action", "answer_data": [ "permitted actions", "preconditions", "refusals", "escalation" ] } ] } ] } ] } ] }, "statistics": { "bundles": 5, "layers": 10, "findings": 12, "questions": 32 } } } }