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Maxillary premolar crown morphology. A preliminary study

J F van Reenen1, C Reid

  • 1Department of Anatomical Sciences, University of the Witwatersrand, Medical School, Parktown, Johannesburg.

The Journal of the Dental Association of South Africa = Die Tydskrif Van Die Tandheelkundige Vereniging Van Suid-Afrika
|December 1, 1996
PubMed
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This study clarifies human premolar cusp identification using serial homology, confirming paracone and protocone as major maxillary cusps. It suggests the loss of lingual cingulum and metacone, with metaconule remnants contributing to the distal margin.

Area of Science:

  • Anthropology
  • Comparative Anatomy
  • Dental Morphology

Background:

  • The Osborn terminology for identifying human premolar crown structures is underutilized.
  • A lack of comparative studies between premolar and molar topography in humans contributes to this reluctance.

Purpose of the Study:

  • To compare the topography of human premolars with molars using serial homology.
  • To clarify the nomenclature of human premolar cusps.

Main Methods:

  • Application of serial homology principles.
  • Comparative analysis of premolar and molar crown topography in humans.

Main Results:

  • Confirmation of paracone and protocone as the two major maxillary premolar cusps in humans.

Related Experiment Videos

  • Evidence suggesting the evolutionary loss of the lingual cingulum and metacone.
  • Identification of metaconule remnants contributing to the distal crown margin.

    • Conclusions:

    • The paracone and protocone are the primary cusps of human maxillary premolars.
    • Human premolar morphology reflects evolutionary changes, including cusp reduction and modification.