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Tooth morphometry in lingual orthodontics.

Yu-Chuan Tseng1, Hong-Po Chang, Tsau-Mau Chou

  • 1Department of Orthodontics, Kaohsiung Medical University Hospital, Kaohsiung, Taiwan.

The Kaohsiung Journal of Medical Sciences
|February 9, 2005
PubMed
Summary
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This study examined tooth angulation and inclination in Taiwanese individuals with optimal occlusion. Most teeth showed mesial tipping and labial inclination, crucial data for lingual orthodontic treatments.

Area of Science:

  • Orthodontics
  • Dental Morphology
  • Biometrics

Background:

  • Lingual orthodontics offers a less visible treatment alternative.
  • Understanding natural tooth positioning is vital for successful orthodontic outcomes.
  • Optimal occlusion provides a baseline for analyzing natural tooth alignment.

Purpose of the Study:

  • To investigate the lingual crown angulation and inclination of teeth in Taiwanese individuals with optimal occlusion.
  • To establish normative data for tooth positioning in this specific demographic.
  • To inform the practice of lingual orthodontics.

Main Methods:

  • Analysis of 45 dental study casts from Taiwanese adults (28 males, 17 females) with optimal occlusion.
  • Measurement of mesial-distal tipping and labio-lingual inclination for each tooth type.

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  • Selection from a larger sample of approximately 5,000 young adults.

    • Main Results:

    • Mesial tipping was prevalent in most teeth, excluding upper second molars, lower central incisors, and lower lateral incisors.
    • Lower second molars exhibited the greatest mesial tipping, while lower lateral incisors showed the greatest distal tipping.
    • Labial (buccal) inclination was common, except for lower first and second molars. Upper central incisors had maximum labial inclination, and lower first molars had maximum lingual inclination.

    Conclusions:

    • Significant mesial tipping and labial inclination characterize the natural occlusion of Taiwanese adults.
    • These findings provide essential reference data for lingual orthodontic treatment planning.
    • Variations in angulation and inclination highlight the need for individualized orthodontic approaches.