Three‐dimensional measurement of the occlusal surfaces of lower first molars of Australian aboriginals

The occlusal surfaces of lower first molars of Australian Aboriginals were measured in three dimensions with the aid of Moiré contourography. Molar cuspal heights in this population were higher than in Japanese (Mongoloid) but lower than in Dutch (Caucasoid) populations. Intercuspal distances were considerably larger than those in the two other populations. Populational differences in occlusal features may influence both craniofacial structures and jaw movements in the three populations. Low correlations between the cuspal heights and the intercuspal distances in the other two populations were also found in this population, indicating that human molar cuspal height is independent of the transverse size of the crown. Mean values for the height of the three principal cusps in lower first molars were less than those in upper ones. However, the height of the hypoconid, which was the highest in the lower molar cusps, showed almost the same mean value as the height of the upper three principal cusps, indicating that the height of the main functional cusp, in both upper and lower first molars, was almost the same

Craniofacial · Crown (dentistry) · Cusp (singularity) · Geometry · Mandibular first molar · Mandibular second molar · Molar · Population · Dental Radiography and Imaging · Dentistry · Forensic Anthropology and Bioarchaeology Studies · Mathematics · Medicine · Orthodontics · Pleistocene-Era Hominins and Archaeology

• Cuspal ridges of deciduous upper second molars in Japanese subjects

  Open Access•Mitsuo Sekikawa, Eisaku Kanazawa et al.•The Journal of Anthropological…•1990

  Incluir item

• Three-dimensional measurement of the occlusal surface the upper first molar in South African samples

  Open Access•Eisaku Kanazawa, Donald H Morris et al.•The Journal of Anthropological…•1988

  Incluir item

• Contours of maxillary molars studied in Australian Aboriginals

  Open Access•Hiroyuki Yamada, T Brown•American Journal of Physical…•1988

  Incluir item

• Concepts of occlusion

  Open Access•T Brown, Grant C Townsend et al.•American Journal of Physical…•1990

  Incluir item

• Comparative study of the upper molar occlusal table morphology among seven human populations

  Open Access•Eisaku Kanazawa, Donald H Morris et al.•American Journal of Physical…•1988

  Incluir item

• A quantitative investigation of irregular cuspules in human maxillary permanent molars

  Open Access•Eisaku Kanazawa, Mitsuo Sekikawa et al.•American Journal of Physical…•1990

  Incluir item

• Three‐dimensional analysis of the maxillary first molar crowns of Canadian Inuit

  Open Access•John T Mayhall, Eisaku Kanazawa•American Journal of Physical…•1989

  Incluir item

• Experimental stress analysis of topographic diversity in early hominid gnathic morphology

  Open Access•Steven C Ward, Steven Ward et al.•American Journal of Physical…•1980

  Incluir item

• Heritability of deciduous tooth size in Australian aboriginals

  Open Access•Grant C Townsend•American Journal of Physical…•1980

  Incluir item

• Molar size sequence in Australian Aboriginals

  Open Access•Grant C Townsend, T Brown•American Journal of Physical…•1983

  Incluir item

• Tooth size and morphology in a recent Australian Aboriginal population from Broadbeach, South East Queensland

  Open Access•Patricia Smith, T Brown et al.•American Journal of Physical…•1981

  Incluir item

• Australian Tooth-Size Clines and the Death of a Stereotype [and Comments and Reply]

  C Loring Brace, T Brown et al.•Current Anthropology•1980

  Incluir item