Factors associated with mandibular third molar eruption and impaction

Hung Huey Tsai

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)


A retrospective study, using panoramic radiographs, was conducted on 152 Taiwanese (72 males and 80 females) to investigate mandibular third molar eruption and impaction. The following measurements were made: inclinations and mesiodistal crown widths of the mandibular molars, vertical and horizontal spaces between the distal surface of the second molar and the anterior surface of the ramus, lengths and widths of the mandibular ramus and body, the ramus inclination, the mandibular plane angle, and the mandibular gonial angle. Differences between non-impaction and impaction groups were studied, and the variables were analyzed with multivariate discriminatory analysis. Significant differences between the two groups were found; variables describing spaces between the anterior of the ramus and the distal of the mandibular second molar and tooth size appeared to be the primary contributors to the differences observed.

Original languageEnglish
Pages (from-to)109-114
Number of pages6
JournalJournal of Clinical Pediatric Dentistry
Issue number2
Publication statusPublished - 2005

ASJC Scopus subject areas

  • Pediatrics, Perinatology, and Child Health
  • General Dentistry


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