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Related Experiment Videos

A jig for measuring incisor inclination.

N Shah1, D J Spary, W P Rock

  • 1School of Dentistry, University of Birmingham, St Chad's Queensway, Birmingham B4 6NN, UK.

European Journal of Orthodontics
|June 11, 2005
PubMed
Summary

A new, inexpensive dental jig accurately measures incisor angulation to jaw planes. This device offers a reliable alternative to traditional cephalometric analysis for orthodontic assessments.

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Area of Science:

  • Dentistry
  • Orthodontics
  • Biomedical Engineering

Background:

  • Accurate measurement of incisor angulation is crucial in orthodontics.
  • Traditional cephalometric analysis can be time-consuming and requires specialized equipment.

Purpose of the Study:

  • To design and construct a simple, inexpensive jig for measuring incisor inclination.
  • To evaluate the accuracy of this jig compared to cephalometric measurements.

Main Methods:

  • Development and testing of several jig prototypes.
  • Measurement of incisor angulation in 51 subjects using the developed jig.
  • Comparison of jig measurements with standard cephalometric values via regression analysis.

Main Results:

  • The jig demonstrated high accuracy, converting to cephalometric angulations with 96% accuracy to 10 degrees.
  • For upper incisors, the jig was accurate to 5 degrees on 69% of occasions.
  • For lower incisors, 5-degree accuracy was achieved 27% of the time, improving to 78% within a 6-degree range.

Conclusions:

  • The developed jig provides a simple and cost-effective method for measuring incisor angulation.
  • The jig offers a high degree of accuracy, particularly for upper incisors, serving as a viable alternative to cephalometric analysis.

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