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Mandibular premolar differentiation

O Carlsen1, V Alexandersen

  • 1Department of Dental Morphology, Faculty of Health Sciences, University of Copenhagen, Denmark.

Scandinavian Journal of Dental Research
|April 1, 1994
PubMed
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This study introduces a new method to distinguish between the first and second human mandibular premolars using macromorphologic criteria. The findings reveal significant differences in crown morphology, enabling reliable differentiation.

Area of Science:

  • Anthropology
  • Forensic Science
  • Odontology

Background:

  • Differentiating between human mandibular first (P1 inf) and second (P2 inf) premolars is crucial in forensic and anthropological studies.
  • Existing methods may lack precision or require specialized equipment.

Purpose of the Study:

  • To develop and validate a reliable method for distinguishing P1 inf from P2 inf based on macromorphologic criteria.
  • To identify key morphological features that differentiate these two premolar types.

Main Methods:

  • Analysis of 260 stone casts of human mandibular premolars (P1 inf and P2 inf) from 131 girls and 129 boys.
  • Evaluation of various macromorphologic criteria, reduced to four distinct type-combinations.
  • Stereomicroscopic observation and statistical analysis of type distribution.

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Main Results:

  • Four distinct morphological types were identified for differentiating P1 inf and P2 inf.
  • No significant differences in type distribution were found between sexes or sides (left/right).
  • A highly significant difference in the distribution of the four types was observed between P1 inf and P2 inf.

Conclusions:

  • The proposed method, based on four defined macromorphologic types, effectively differentiates between human mandibular first and second premolars.
  • This method offers a valuable tool for anthropological and forensic analyses where precise tooth identification is necessary.