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Impact Loading

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Impact loading occurs when a moving object collides with a stationary structure, such as a rod with a uniform cross-sectional area fixed at one end. Under these conditions, the rod absorbs the kinetic energy from the striking object, leading to deformation and subsequent stress development. As the rod returns to its original position and reaches maximum stress, the absorbed energy, initially manifested as kinetic energy, transforms entirely into strain energy.
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A Finite Element Approach for Locating the Center of Resistance of Maxillary Teeth
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Traumatic impact loading on human maxillary incisor: A Dynamic finite element analysis.

K Jayasudha1, M Hemanth, Raj Baswa

  • 1Department of Pedodontics and Preventive dentistry, Rajarajeswari Dental College and Hospital, Bengaluru, Karnataka, India.

Journal of the Indian Society of Pedodontics and Preventive Dentistry
|September 19, 2015
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Summary

Horizontal impact on maxillary incisors causes cervical crown and oblique root fractures. This study used dynamic finite element analysis to simulate traumatic loading on a 3D tooth model.

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Area of Science:

  • Biomechanics
  • Dental Traumatology
  • Finite Element Analysis

Background:

  • Maxillary incisors are highly susceptible to dental injuries, accounting for 80% of cases.
  • Understanding the biomechanics of tooth fracture under impact is crucial for effective treatment.

Purpose of the Study:

  • To investigate stress distribution in a 3D upper incisor model under various traumatic impact directions.
  • To analyze the biomechanical response of the maxillary incisor to impact loading.

Main Methods:

  • A three-dimensional (3D) finite element model of the upper incisor and surrounding tissues was created.
  • A sinusoidal force of 800N was applied over 4 milliseconds to simulate impact.

Main Results:

  • Dynamic finite element analysis simulated stress patterns within the incisor.
  • Horizontal impact resulted in peak stress of 125 MPa in the cervical crown area at 2 ms.

Conclusions:

  • Horizontal forces on the labial surface of maxillary incisors can lead to cervical crown fractures.
  • These forces may also cause oblique crown root and oblique root fractures.
  • Finite element analysis provides valuable insights into dental trauma biomechanics.