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Related Concept Videos

Tooth Anatomy01:21

Tooth Anatomy

The human tooth enables us to eat a variety of foods, speak clearly, and even aid in shaping our faces. Teeth are composed of various elements that work together. Here's a detailed look at the anatomy of a human tooth.
The Crown, Neck, and Root
The visible part of the tooth is referred to as the crown. It's covered by enamel, the hardest substance in the human body. The crown is uniquely shaped for each type of tooth, allowing for different functions such as cutting, tearing, or grinding food.

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Related Experiment Video

Updated: Jun 20, 2026

Isolation of Whole Cell Protein Lysates from Mouse Facial Processes and Cultured Palatal Mesenchyme Cells for Phosphoprotein Analysis
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Runx2, osx, and dspp in tooth development.

S Chen1, J Gluhak-Heinrich, Y H Wang

  • 1Department of Pediatric Dentistry, TheUniversity of Texas Health Science Center at San Antonio,7703 Floyd Curl Dr., San Antonio, TX 78229-3900, USA. Chens0@uthscsa.edu

Journal of Dental Research
|September 29, 2009
PubMed
Summary
This summary is machine-generated.

Runx2 and Osx transcription factors play distinct roles in bone and tooth development. Osx (Osterix) directly influences Dspp expression, suggesting independent functions in osteoblast and odontoblast differentiation.

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Area of Science:

  • Developmental Biology
  • Molecular Biology
  • Craniofacial Development

Background:

  • Runx2 and Osx are crucial for osteoblast and odontoblast differentiation.
  • Dspp is vital for odontoblast differentiation.
  • The interplay between Runx2, Osx, and Dspp in tooth and craniofacial bone development is not fully understood.

Purpose of the Study:

  • To investigate the relationship among Runx2, Osx, and Dspp during tooth and craniofacial bone development.
  • To test the hypothesis that Runx2 and Osx have independent roles in regulating osteoblast and odontoblast lineages.

Main Methods:

  • Analysis of gene expression patterns (Runx2, Osx, Dspp) during embryonic and postnatal development.
  • In vitro studies involving overexpression of Osx in mouse odontoblast-like cells.

Main Results:

  • Runx2 and Osx expression overlapped in early dental and osteogenic mesenchyme.
  • Runx2 expression decreased while Osx remained high in later-stage odontoblasts.
  • Osx overexpression significantly increased Dspp transcription in odontoblast-like cells.

Conclusions:

  • Runx2, Osx, and Dspp exhibit differential functions in odontogenesis and osteogenesis.
  • Osx appears to play a more direct role in regulating Dspp expression in odontoblasts.
  • These findings suggest distinct regulatory mechanisms for osteoblast and odontoblast differentiation.