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Related Concept Videos

Teeth01:15

Teeth

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The formation of teeth, also known as odontogenesis, is a complex process that begins in utero, around the sixth week of embryonic development. There are three stages to this process: the bud stage, the cap stage, and the bell stage.
In the bud stage, the tooth germ (an aggregation of cells) starts to form in the developing jawbone. During the cap stage, the tooth germ differentiates into enamel organ, dental papilla, and dental sac, which will later develop into the tooth's enamel, dentin...
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Tooth Anatomy01:21

Tooth Anatomy

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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.
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...
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Related Experiment Video

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A Finite Element Approach for Locating the Center of Resistance of Maxillary Teeth
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Periapical surgery and different root obturation protocols for upper central incisor: A finite elements analysis.

E Klein-Franke1, E Youssef2, L Keilig3

  • 1Oral Technology, University of Bonn, Welschnonnenstr. 17, Bonn 53111, Germany.

Annals of Anatomy = Anatomischer Anzeiger : Official Organ of the Anatomische Gesellschaft
|August 28, 2024
PubMed
Summary

Periapical surgery on upper incisors increases stress on teeth and bone, with immature roots experiencing the highest stress. Obturation materials have minimal impact on stress in intact teeth.

Keywords:
ApicoectomyCBCTFibre reinforced postFinite element analysisImmature rootRoot canal treatmentUpper central incisor

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Area of Science:

  • Dental biomechanics
  • Finite element analysis
  • Oral surgery

Background:

  • Investigating the biomechanical effects of root canal filling materials and apicoectomy on upper central incisors.
  • Assessing the impact of incomplete root formation on tooth stability under load.

Purpose of the Study:

  • To determine the influence of various obturation materials combined with apicoectomy on tooth stress.
  • To evaluate the biomechanical behavior of immature roots under loading conditions.

Main Methods:

  • Utilizing CBCT-scan data to create a finite element model of an upper central incisor.
  • Simulating root canal treatment, apicoectomy, and immature root formation.
  • Applying loads of 1 N and 100 N to measure stress, strain, rotation, and displacement.

Main Results:

  • Periapical surgery significantly increases stress in dentin and surrounding bone.
  • Obturation materials showed only minor differences in stress levels for intact teeth.
  • Immature roots exhibited the highest stress values, nearing half the yield strength of dentin.

Conclusions:

  • Interincisal angle and loading direction are critical factors in periapical surgery planning and finite element analysis.
  • Immature root formation presents a significant biomechanical challenge, with high stress concentrations.