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Related Experiment Videos

Relationship of third molar development and root angulation.

M Yamaoka1, K Furusawa, H Hayama

  • 1Oral and Maxillofacial Surgery Department II, Matsumoto Dental University School of Dentistry, Nagano, Japan. yamaoka@po.mdu.ac.jp

Journal of Oral Rehabilitation
|April 12, 2001
PubMed
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Angled roots in mandibular third molars are more common in individuals with differing eruption statuses between sides. This finding suggests environmental influences on tooth development, particularly in women with impacted teeth.

Area of Science:

  • Dentistry
  • Oral and Maxillofacial Surgery
  • Human Anatomy

Background:

  • Angled roots are frequently observed in mandibular third molars.
  • Mandibular third molars exhibit a high prevalence of incomplete impaction.

Purpose of the Study:

  • To investigate the association between angled roots and incomplete impaction in mandibular third molars.
  • To determine the prevalence of angled roots in relation to impaction status.

Main Methods:

  • Analysis of orthopantomographs from 239 men and 222 women (aged 21–35 years).
  • Assessment of bilateral mandibular third molars for root angulation and impaction status.

Main Results:

  • Angled roots were more prevalent in subjects with asymmetrical impaction statuses (unilateral vs. bilateral).

Related Experiment Videos

  • Women with bilateral incomplete impactions showed a significantly higher incidence of angled roots compared to those with bilateral eruption (P<0.01).
  • Angled roots were found more frequently in women with incomplete impaction than with full eruption.

    • Conclusions:

    • Angled roots in mandibular third molars are linked to environmental factors.
    • The findings suggest a correlation between environmental influences and the development of angled roots, especially in cases of incomplete impaction in women.