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Related Experiment Videos

Models for the study of cementogenesis

J A D'Errico1, R L MacNeil, C L Strayhorn

  • 1Department of Periodontics/Prevention/Geriatrics, University of Michigan, Ann Arbor, USA.

Connective Tissue Research
|January 1, 1995
PubMed
Summary
This summary is machine-generated.

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Researchers investigated cementum formation using mouse molars, finding that dental cells can form mineralized nodules. Defects in root development in osteopetrotic mice correlated with absent bone sialoprotein (BSP).

Area of Science:

  • Biomineralization
  • Developmental Biology
  • Cell Biology

Background:

  • Cementum, a mineralized tissue connecting the periodontal ligament to the tooth root, shares compositional similarities with bone.
  • The cellular origins and regulatory factors for cementum formation remain incompletely understood.
  • Adhesion molecules and their receptors are hypothesized to play a role in cementum and tooth root development.

Purpose of the Study:

  • To investigate the role of adhesion molecules in cementum and tooth root formation.
  • To identify potential cementoblast progenitor cells in vitro.
  • To examine mineralized tissue formation and bone sialoprotein (BSP) expression in a mouse model of defective root development.

Main Methods:

  • Utilized a mouse molar system to study the development of bone, cementum, dentin, and enamel.

Related Experiment Videos

  • Cultured dental papilla and dental follicle cells in vitro to assess their ability to induce mineralized nodules.
  • Examined tissues from osteopetrotic (op/op) mice and control littermates for root development defects and BSP expression using immunohistochemistry.

    • Main Results:

    • Dental papilla and dental follicle cells from day 21 mouse molars induced mineralized nodule formation in vitro.
    • Osteopetrotic (op/op) mice exhibited delayed and/or defective root development at day 33.
    • BSP protein was not localized in the dental tissues of op/op mice, which also showed defective dentin formation and immature odontoblasts, unlike control molars.

    Conclusions:

    • Dental papilla and follicle cells possess the potential to form mineralized tissues.
    • Bone sialoprotein (BSP) is crucial for normal root development, particularly cementum formation.
    • Osteopetrotic (op/op) mice present a valuable model for studying impaired cementum and dentin formation due to genetic defects affecting mineralized tissue development.