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Bialveolar protrusion in a Zimbabwean sample.

Tarisai C Dandajena1, Ram S Nanda

  • 1Department of Orthodontics, University of Oklahoma Health Sciences Center, 1001 S.L. Young Boulevard, Oklahoma City, OK 73190, USA. Tarisai-Dandajena@ouhsc.edu

American Journal of Orthodontics and Dentofacial Orthopedics : Official Publication of the American Association of Orthodontists, Its Constituent Societies, and the American Board of Orthodontics
|February 21, 2003
PubMed
Summary

Dentoalveolar analysis of adult Black Zimbabweans revealed prognathic jaws and upright maxillary incisors. Mandibular incisors were proclined, likely compensating for the prognathic maxilla.

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Area of Science:

  • Orthodontics
  • Anthropology
  • Cephalometric analysis

Background:

  • Understanding dentoalveolar and skeletal patterns in diverse populations is crucial for accurate orthodontic diagnosis.
  • Previous cephalometric studies have focused on Western populations, necessitating research on other ethnic groups.

Purpose of the Study:

  • To evaluate dentoalveolar and skeletal relationships in a Class I occlusion sample of adult Black Zimbabweans.
  • To compare cephalometric measurements between males and females in this population.

Main Methods:

  • Lateral cephalograms were analyzed from 50 adult Black Zimbabweans (25 males, 25 females) with Class I occlusions.
  • Twelve angular and six linear cephalometric measurements were taken and statistically analyzed using the Student t test.

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Main Results:

  • No statistically significant sex differences were observed in the cephalometric measurements.
  • The sample exhibited a low Frankfort-mandibular plane angle, prognathic maxilla (SNA) and mandible (SNB), and a large ANB angle.
  • Maxillary incisors were upright (20.6° ± 7.7° to NA), while mandibular incisors were significantly proclined (IMPA 105.8° ± 6.0°).

Conclusions:

  • Adult Black Zimbabweans present with prognathic jaw relationships and proclined mandibular incisors.
  • The observed mandibular incisor proclination may be a compensatory mechanism for the prognathic maxilla.