{"schema":"https://ver.cy/schemas/card/1.0.0","id":"vr.tr.cementoblast","code":"thing-q189341","url":"https://ver.cy/models/thing/q189341/","name":"cementoblast","alternateNames":[],"kind":"thing","status":"published","version":"0.1.0-research.1","language":"en","classifiers":{"family":"Thing Registry","category":"Physical world and living systems","entryKind":"thing","plane":"PHY","domain":["PHY.OBJ"],"industry":[],"navPath":"","tags":[],"facets":{}},"whatItIs":"A cementoblast is a specialized connective-tissue cell on a tooth-root surface that produces the organic matrix of cementum and participates in its mineralization.","purpose":"Enable an agent to recognize a cementoblast, assess its cementum-forming state, and select justified observations or experimental actions.","scope":{"in":["Identification of cementoblasts in tooth-root tissue and isolated preparations","Relationship to the cementum surface and adjacent periodontal ligament","Evidence for differentiation into a cementum-forming phenotype","Cementum matrix secretion and associated mineralization activity","Cell viability, environmental responses, and phenotype retention during experiments"],"out":["Cementum as a mineralized tissue with its own architecture and mechanical properties","Embedded cementocytes and their mature functions","Osteoblasts, odontoblasts, periodontal ligament fibroblasts, and cementoclasts as separate cell types","The whole tooth and periodontal attachment apparatus","Cementoblastoma classification and patient diagnosis","Clinical periodontal regeneration procedures and treatment decisions"],"boundaries":[]},"distinguishingFeatures":["Establish association with the external root cementum-forming surface; distinguish this position from alveolar bone-lining osteoblasts and pulp-side odontoblasts.","Determine whether the cell body remains on the cementum surface or is enclosed in a cementum lacuna; the latter supports classification as a cementocyte.","Require evidence of cementum matrix-forming activity or a validated cementoblast phenotype before classifying an adjacent periodontal ligament cell as a cementoblast.","Use anatomical origin and comparative phenotype evidence together: osteocalcin reporter expression alone did not distinguish cementoblasts from osteoblasts and odontoblasts in a mouse isolation study. [Gene-expression analysis of cementoblasts and osteoblasts](https://pubmed.ncbi.nlm.nih.gov/26215316/)","Distinguish matrix deposition from root-surface resorption; an excavating, resorptive phenotype requires evaluation against a cementoclast identity."],"structure":{"bundles":[{"id":"cementoblast-identity","name":"Cementoblast identity","description":"Evidence needed to recognize a cementum-forming cell and distinguish nearby cell types.","layers":[{"id":"anatomical-discrimination","name":"Anatomical discrimination","description":"Locate the cell relative to the tooth's distinct matrix-forming surfaces.","findings":[{"id":"root-surface-assignment","name":"Root-surface assignment","description":"Record the candidate cell's position against visible cementum, dentin, periodontal ligament, and alveolar bone landmarks.","questions":[{"text":"Is the cell on the external cementum surface, the alveolar bone surface, or the pulp-facing dentin boundary?","id":"root-surface-assignment-q01","kind":"boundary"},{"text":"Which section, image, or dissection record establishes its original position?","id":"root-surface-assignment-q02","kind":"provenance"}]}]},{"id":"comparative-phenotype","name":"Comparative phenotype","description":"Evaluate molecular evidence against plausible alternative identities.","findings":[{"id":"contextual-marker-panel","name":"Contextual marker panel","description":"Record a comparative panel rather than a universal marker rule. BARX1 and WIF1 showed discriminatory patterns in a mouse study, but that result does not establish specificity across species and preparations. [Gene-expression analysis of cementoblasts and osteoblasts](https://pubmed.ncbi.nlm.nih.gov/26215316/)","questions":[{"text":"Which marker combination has been validated for this species, root region, and preparation?","id":"contextual-marker-panel-q01","kind":"definition"},{"text":"What results were obtained in matched osteoblast, odontoblast, and periodontal ligament fibroblast controls?","id":"contextual-marker-panel-q02","kind":"measurement"},{"text":"Does conflicting anatomical or functional evidence require a provisional cementoblast-like label?","id":"contextual-marker-panel-q03","kind":"boundary"}]}]}]},{"id":"root-niche-and-origin","name":"Root niche and origin","description":"The anatomical and developmental context of the observed cementoblast.","layers":[{"id":"cementum-interface","name":"Cementum interface","description":"Connect the cell to the particular root surface and matrix it borders.","findings":[{"id":"local-cementum-context","name":"Local cementum context","description":"Record root region and independently identified adjacent cementum type without assigning cell identity solely from that tissue label.","questions":[{"text":"Which tooth, root region, and cementum surface does the cell border?","id":"local-cementum-context-q01","kind":"provenance"},{"text":"How was the adjacent cementum classified, including cellularity and fiber organization?","id":"local-cementum-context-q02","kind":"definition"}]}]},{"id":"lineage-evidence","name":"Lineage evidence","description":"Separate demonstrated ancestry from assumptions based on location or differentiation conditions.","findings":[{"id":"origin-and-differentiation-history","name":"Origin and differentiation history","description":"Capture the claimed precursor, tracing method, and developmental interval while retaining unresolved ancestry as uncertainty.","questions":[{"text":"What direct tracing or isolation evidence supports the proposed precursor population?","id":"origin-and-differentiation-history-q01","kind":"provenance"},{"text":"Which observations establish acquisition of a cementoblast phenotype rather than continued precursor status?","id":"origin-and-differentiation-history-q02","kind":"boundary"},{"text":"What species and developmental interval limit interpretation of the lineage evidence?","id":"origin-and-differentiation-history-q03","kind":"provenance"}]}]}]},{"id":"cementum-matrix-production","name":"Cementum matrix production","description":"Evidence connecting the cell to extracellular matrix secretion and mineral deposition.","layers":[{"id":"matrix-secretion","name":"Matrix secretion","description":"Measure production and deposition of extracellular matrix at the cementum interface.","findings":[{"id":"attributable-matrix-output","name":"Attributable matrix output","description":"Distinguish newly synthesized cell-derived matrix from pre-existing root matrix, medium components, and output from neighboring cells.","questions":[{"text":"Which newly synthesized matrix components were detected, by what method and over what interval?","id":"attributable-matrix-output-q01","kind":"measurement"},{"text":"How is this output attributed to the candidate cementoblast rather than adjacent fibroblasts or other cells?","id":"attributable-matrix-output-q02","kind":"boundary"}]}]},{"id":"mineralization-evidence","name":"Mineralization evidence","description":"Assess mineral accumulation in relation to the cell's matrix-forming activity.","findings":[{"id":"matrix-associated-mineral","name":"Matrix-associated mineral","description":"Record mineralization measurements and controls without equating a positive mineral stain with proof of cementum identity.","questions":[{"text":"What mineral quantity, mineralized area, or apposition rate was measured, with which units and normalization?","id":"matrix-associated-mineral-q01","kind":"measurement"},{"text":"Which controls distinguish cell-associated mineralization from precipitation caused by the medium or substrate?","id":"matrix-associated-mineral-q02","kind":"boundary"},{"text":"What additional evidence is needed before describing the deposited material as cementum?","id":"matrix-associated-mineral-q03","kind":"action"}]}]}]},{"id":"functional-state-and-fate","name":"Functional state and fate","description":"Changes in cementum-forming activity, survival, and enclosure within matrix.","layers":[{"id":"secretory-state","name":"Secretory state","description":"Relate observed matrix output to viability and the observation interval.","findings":[{"id":"activity-versus-cell-loss","name":"Activity versus cell loss","description":"Keep secretory output and viability as separate observations before assigning an active, low-activity, or injured state.","questions":[{"text":"What matrix output per viable cell supports the assigned secretory state?","id":"activity-versus-cell-loss-q01","kind":"measurement"},{"text":"Can decreased output be explained by cell loss, sampling time, or assay sensitivity?","id":"activity-versus-cell-loss-q02","kind":"boundary"}]}]},{"id":"cementocyte-transition","name":"Cementocyte transition","description":"Track the boundary between a surface-associated cell and a cell enclosed within cementum.","findings":[{"id":"enclosure-and-reclassification","name":"Enclosure and reclassification","description":"Record enclosure geometry and temporal evidence before transferring the cell's mature identity to a cementocyte model.","questions":[{"text":"Is the cell body surface-associated, partly surrounded by matrix, or fully enclosed in a lacuna?","id":"enclosure-and-reclassification-q01","kind":"measurement"},{"text":"Could section orientation make a surface cell appear embedded, and what imaging resolves this?","id":"enclosure-and-reclassification-q02","kind":"boundary"},{"text":"What evidence warrants reclassification as a cementocyte?","id":"enclosure-and-reclassification-q03","kind":"action"}]}]}]},{"id":"experimental-use-and-response","name":"Experimental use and response","description":"Fitness of cementoblast preparations for experiments and interpretation of their responses.","layers":[{"id":"preparation-fidelity","name":"Preparation fidelity","description":"Assess whether isolation and culture preserve a sufficiently supported cementoblast phenotype.","findings":[{"id":"identity-retention","name":"Identity retention","description":"Connect original root provenance to isolation, passage, immortalization where applicable, and subsequent phenotype checks.","questions":[{"text":"What root tissue and selection procedure produced this population, and which contaminating cell types were assessed?","id":"identity-retention-q01","kind":"provenance"},{"text":"How do current identity and matrix-production measurements compare with the initial preparation?","id":"identity-retention-q02","kind":"measurement"},{"text":"Does the preparation support the proposed cementoblast experiment, or is additional authentication required?","id":"identity-retention-q03","kind":"action"}]}]},{"id":"controlled-perturbation","name":"Controlled perturbation","description":"Interpret responses to substrates, signaling factors, inflammatory exposures, or mechanical conditions.","findings":[{"id":"cementogenic-response-attribution","name":"Cementogenic response attribution","description":"Separate effects on survival, proliferation, phenotype, matrix secretion, and mineral deposition before claiming enhanced cementum formation.","questions":[{"text":"What exposure magnitude, duration, substrate, and matched control define the comparison?","id":"cementogenic-response-attribution-q01","kind":"provenance"},{"text":"Which changes persist after normalization for viable cell number and comparison with baseline phenotype?","id":"cementogenic-response-attribution-q02","kind":"measurement"},{"text":"What further tissue-level evidence is required before interpreting this response as periodontal regeneration?","id":"cementogenic-response-attribution-q03","kind":"boundary"}]}]}]},{"id":"evidence-and-external-alignment","name":"Evidence and external alignment","description":"What the world already says about this thing, gathered so the model can be checked against it.","layers":[{"id":"reported-evidence","name":"Reported evidence","description":"Findings from the breadth pass, kept separate from the structural claims.","findings":[{"id":"evidence-confidence-notes","name":"Check these first","description":"Recalled without web access and unsourced; every item is a lead to verify.","questions":[{"text":"Which of these check these first hold for the sense of cementoblast this model covers, and on what evidence?","id":"evidence-confidence-notes-q01","kind":"provenance"}]},{"id":"evidence-real-world-use","name":"Real-world use","description":"Recalled without web access and unsourced; every item is a lead to verify.","questions":[{"text":"Which of these real-world use hold for the sense of cementoblast this model covers, and on what evidence?","id":"evidence-real-world-use-q01","kind":"provenance"}]},{"id":"evidence-failure-modes-and-hazards","name":"Failure modes and hazards","description":"Recalled without web access and unsourced; every item is a lead to verify.","questions":[{"text":"Which of these failure modes and hazards hold for the sense of cementoblast this model covers, and on what evidence?","id":"evidence-failure-modes-and-hazards-q01","kind":"provenance"}]},{"id":"evidence-neighbours","name":"Neighbouring kinds and how to tell them apart","description":"Recalled without web access and unsourced; every item is a lead to verify.","questions":[{"text":"Which of these neighbouring kinds and how to tell them apart hold for the sense of cementoblast this model covers, and on what evidence?","id":"evidence-neighbours-q01","kind":"provenance"}]}]}]}]},"agentConduct":{"may":["Describe cementoblasts and their role in forming cementum on tooth roots, citing sources.","Explain related dental conditions in general terms with a referral to a dentist."],"mustNot":["Diagnose a person's dental condition from images or symptoms.","Share a person's dental records or X-rays without consent.","Recommend treatments for root conditions without a dentist's decision.","Present early research on tissue regeneration as available treatment."],"requiresHuman":["Any dental treatment decision for a person.","Using donated teeth or tissue in research without consent."]},"ethics":{"considerations":["Dental records are personal health data and are also used to identify people.","Overstated regenerative claims mislead patients."],"affectedParties":["Patients","Tissue donors","Dentists and researchers"]},"owners":{"steward":"The person in whose body they live; dentists hold the records.","roles":[],"masterSystems":[]},"relations":[{"target":"Q10263086","type":"parent","note":"registry parent class"}],"interaction":{"identity":{"applicability":"required","items":["Vercy registry: vr.tr.cementoblast","Wikidata: Q189341 (https://www.wikidata.org/wiki/Q189341)"]},"properties":{"applicability":"required","items":["Biological and preparation context: Species, donor developmental stage, tooth type; in situ, freshly isolated, primary culture, or established cell line","Root-surface position: Linked tooth and root; cervical, middle, apical, or furcation region; adjacent cementum and periodontal ligament","Matrix enclosure: Surface-associated, partially enclosed, fully enclosed in a lacuna, or unresolved","Cementoblast identity assessment: Supported, provisional, conflicting, or unresolved; linked anatomical, molecular, and functional evidence","Marker profile: Assay-specific transcript or protein abundance with normalization, controls, and detection limits","Matrix-forming activity: Specified matrix product per viable cell per unit time, using assay-defined units","Associated mineral deposition: Mineralized area fraction (%), calcium quantity, or apposition rate (µm/day), with method and attribution limits","Viability: Viable cells (%) for a defined population, assay, and observation time","Experimental exposure: Linked substrate, medium, stimulus, dose or magnitude, duration, and recovery interval"]},"recognition":{"applicability":"required","items":["Seen only under a microscope, as cells lining the cementum on the root surface.","Not visible by eye in teeth or on dental X-rays."]},"capabilities":{"applicability":"required","items":["Annotate candidate cementoblasts in root sections using anatomical and phenotype evidence.","Compare candidate cells with matched osteoblast, odontoblast, and periodontal ligament fibroblast controls.","Select complementary assays for cementum matrix production, mineral deposition, and viability.","Track surface-associated cells through changes in secretion and matrix enclosure.","Evaluate whether an isolated population retains sufficient cementoblast evidence for a proposed experiment.","Compare controlled exposures while preserving species, root-region, preparation, and assay context."]},"hazards":{"applicability":"required","items":["Abnormal cementum growth or loss linked to root disease.","Misinterpretation of histology."]},"interfaces":{"applicability":"required","items":["Terminologia Histologica, Federative International Programme for Anatomical Terminology (FIPAT)."]},"context":{"applicability":"required","items":["Cementoblasts are encountered in dental histology and research on tooth-root development, periodontal tissues and tissue repair.","Their production of cementum matrix is relevant to understanding how teeth maintain attachment to surrounding periodontal structures.","Researchers examine them in tissue sections and experimental models to study cementum formation and mineralization."]}},"sources":[{"title":"Wikidata item Q189341: cementoblast","url":"https://www.wikidata.org/wiki/Q189341","note":"identity and sense of the item"},{"title":"Wikipedia: Cementoblast","url":"https://en.wikipedia.org/wiki/Cementoblast","note":"general description of the item"}],"openQuestions":["Which marker combinations reliably distinguish human cementoblasts from osteoblasts, odontoblasts, and periodontal ligament fibroblasts across root regions and developmental stages?","How do cementoblast precursor contributions vary by species, developmental stage, and the type of cementum being formed?","Do cells associated with acellular and cellular cementum require distinct substates within this entry, and what evidence would define them?","Which temporal and structural criteria reliably distinguish low-activity surface cementoblasts from cells transitioning into cementocytes?","Which culture measurements predict organized cementum deposition and functional periodontal attachment in tissue, rather than mineral deposition alone?"],"resources":{"spec":"/models/things/publications/thing-q189341/spec.json"},"provenance":{"origin":"thing registry research (pass 2)","builtFrom":["models/things/publications/thing-q189341/spec.json"],"providers":["Codex"],"researchStatus":"unreviewed","generatedAt":"2026-09-12T08:30:55Z","builder":"tools/build_cards.py@1.0.0"},"completeness":{"sections":{"classifiers":"filled","whatItIs":"filled","purpose":"filled","distinguishingFeatures":"filled","structure":"filled","agentConduct":"filled","ethics":"filled","owners":"filled","relations":"filled","interaction.identity":"filled","interaction.properties":"filled","interaction.recognition":"filled","interaction.capabilities":"filled","interaction.hazards":"filled","interaction.interfaces":"filled","interaction.context":"filled","sources":"filled"},"notes":{"_gate":"Published through the thing publication gate 1.0 on 2026-10-07T10:10:27+00:00: completeness 1.00; sense: Wikidata description; 2 live sources; review by codex: pass"},"score":1.0}}