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Related Concept Videos

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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.
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Three-dimensional mammalian tooth development using diceCT.

Qamariya Nasrullah1, Marilyn B Renfree2, Alistair R Evans3

  • 1School of Biological Sciences, 18 Innovation Walk, Monash University, Victoria 3800, Australia.

Archives of Oral Biology
|November 6, 2017
PubMed
Summary
This summary is machine-generated.

This study introduces Diffusible Iodine-based Contrast-Enhanced CT (diceCT) for non-destructive 3D imaging of developing mammalian teeth. The diceCT method effectively visualizes soft and mineralized tissues, revealing tooth development patterns in the tammar wallaby.

Keywords:
3D ReconstructionsCraniofacial developmentLugol’s iodineMammaliaMicroCTOdontogenesis

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Area of Science:

  • Developmental Biology
  • Imaging Science
  • Comparative Anatomy

Background:

  • Non-destructive imaging of developing mammalian tissues is crucial for understanding growth patterns.
  • Existing imaging techniques often lack the resolution or contrast to visualize both soft and mineralized structures simultaneously.
  • The tammar wallaby (Macropus eugenii) serves as a valuable model for studying mammalian development due to its accessible developmental stages.

Purpose of the Study:

  • To develop and validate the Diffusible Iodine-based Contrast-Enhanced CT (diceCT) method for non-destructive 3D imaging.
  • To document the spatio-temporal development of mammalian dentition, including multiple tooth classes and generations.
  • To assess the utility of diceCT for visualizing both soft and mineralized tissues in developing mammals.

Main Methods:

  • MicroCT scans were performed on developing tammar wallaby fetuses and pouch young stained with Lugol's Iodine (I2KI).
  • Stained and unstained specimens were compared to evaluate contrast enhancement.
  • Scan slices were cross-referenced with histological sections for tissue identification.
  • Digital segmentation was employed to generate 3D models of developing structures.

Main Results:

  • DiceCT significantly improved soft tissue contrast, enabling differentiation of epithelial and mesenchymal layers.
  • High-resolution scans achieved single-cell layer visualization within intact heads.
  • The method successfully captured in-situ tooth development, from initiation through morphogenesis and mineralization.
  • Development of cranial bones, brain, eye, and olfactory systems was also documented.

Conclusions:

  • DiceCT is a time- and cost-effective method for generating high-resolution 3D models of developing dentition.
  • The technique provides tissue-level resolution, facilitating the definition of tooth class and generation from a developmental standpoint.
  • DiceCT's versatility allows for the simultaneous documentation of other organ development within the same scans.