Tooth Size of People in Wabag, Papua New Guinea Highlanders and its Comparison with Pacific Peoples.

Kanazawa, Eisaku; Matsuno, Masanobu; Sekiguchi, Hideyuki; Suzuki, Tomomichi; Satake, Takashi; Sasaki, Kimio; Igarashi, Yukio

doi:10.1537/ase.108.169

Cited by 13 publications

(13 citation statements)

References 20 publications

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“…Recently, the origins and relationships among Pacific populations were analyzed based on mtDNA polymorphisms (Lum and Cann, 1998), confirming Aboriginal Australians and Papua New Guinea Highlanders are closely related. However, there have been few descriptions of the dentitions of Sahul-Pacific populations (Barksdale, 1972;Boyde, 1972;Harris and Bailt, 1987;Kanazawa et al, 2000). Kanazawa et al (2000) reported that Papua New Guinea Highlanders had slightly larger incisors, canines, and premolars than Aboriginal Australians from Yuendumu but smaller molars.…”

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“…However, there have been few descriptions of the dentitions of Sahul-Pacific populations (Barksdale, 1972;Boyde, 1972;Harris and Bailt, 1987;Kanazawa et al, 2000). Kanazawa et al (2000) reported that Papua New Guinea Highlanders had slightly larger incisors, canines, and premolars than Aboriginal Australians from Yuendumu but smaller molars. Moreover, Ohno (2001) found that the mandibular first molars of Papua New Guinea Highlanders had a smaller talonid than Aboriginal Australians from Yuendumu.…”

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Size relationships among permanent mandibular molars in Aboriginal Australians and Papua New Guinea Highlanders

2005

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Size relationships among crown units of permanent mandibular molars were investigated in two Sahul-Pacific samples: Aboriginal Australians (Yuendumu) and Papua New Guinea Highlanders (Wabag). Measurements of first, second, and third molars (M1, M2, and M3), including overall mesiodistal and buccolingual diameters as well as the mesiodistal and buccolingual diameters of the trigonid and talonid, were obtained from dental casts using a sliding caliper. Molar reduction was noted in talonid dimensions within both samples, but the trigonid mesiodistal diameter was not reduced in M2 or M3 compared with M1, indicating that the later-developing crown unit (talonid) was more reduced than the early-developing unit (trigonid). M2 was most reduced in size mesiodistally of the three molars, but its buccolingual diameter was not reduced. M3 was the most reduced tooth in trigonid buccolingual diameter. The percentage sexual dimorphism values were greater for the size of the talonid than for the trigonid, indicating that male values exceeded those for females by a greater amount in the later-developing crown unit. Crown dimensions were larger generally in the Aboriginal Australians from Yuendumu than in the Papua New Guinea Highlanders from Wabag, with differences being more evident in M2 and M3 than M1, especially in talonid dimensions. The trigonid, which develops early both phylogenetically and ontogenetically, tended to be relatively stable in size, whereas the later-forming talonid displayed size reduction when comparisons were made both within and between groups.

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Size relationships among permanent mandibular molars in Aboriginal Australians and Papua New Guinea Highlanders

2005

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“…Knowledge so far obtained from this area are lim itedto a few case-studies with insufficient sample sizes. The accumulation of com parativedata sets by a single research team encompassing various samples are hoped for (Kanazawa et al, 1998(Kanazawa et al, , 2000. The basal tubercle in incisors is a cingulum-derived character.…”

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Distribution of Tabercle-shaped Incisors in South Pacific Populations.

Kanazawa¹,

Shirono²,

Nakayama³

et al. 2001

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The basal tubercle and its related traits on the basal part of the lingual surface of maxillary central incisors vary in developmental grades. Although a welldeveloped basal tubercle was observed in fossil humans, much attention to this trait has not been paid in modern humans. We compared five morphological traits on the lingual surface of maxillary incisors among seven Pacific populations. Results showed that the South-Pacific populations examined in this study especially Fijians and New Guinea Highlanders had a well-developed basal tubercle, but with a low fre quencyof shovel-shaped incisors. On the contrary, Japanese and Kiribatian popula tionsof this study had a high frequency of shovel-shaped incisors, but a low fre quencyof tubercle-shaped incisors. It was suggested that the basal tubercle is one of the key dental traits in characterizing Pacific populations.

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“…Our previous study referred to the people in Wabag or Enga Province (Kanazawa et al 2000). The subjects were 26 males ranging in age from 18 to 42 with a mean age of 23.8, and 26 females ranging in age from 18 to 44 with a mean age of 28.1.…”

Section: Methodsmentioning

confidence: 99%

“…Studies on the tooth size of Wabag people (Kanazawa et al 2000), other PNG Highlanders (Doran and Free man,1974;Brace and Hinton, 1981), and people in the Pacific (Hanihara, 1992;Scott and Turner, 1997) have supported this hypothesis.…”

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confidence: 96%

Short and Broad Dental Arch in Papua New Guinea Highlanders.

Igarashi¹,

Matsuno²,

A³

et al. 2001

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Dental arch sizes and shapes of Papua New Guinea (PNG) Highlanders (Wabag, Enga Province, 26 males and 26 females) were measured using photo graphsof dental casts and compared with those of five populations in the Pacific region (Fiji, Samoa, Kiribati, Australia, Japan). The dental arch breadths of the Wabag males and females were the largest among the six groups. The Wabag males had the shortest lengths and the Wabag females were in the middle range among the six groups. As a result, the dental arches of the Wabag people proved to be short and broad. Principal component analyses based on arch measurements showed that the Wabag people were close to Fijians suggesting that these two Melanesian popula tionshad similar dental arch forms.

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Tooth Size of People in Wabag, Papua New Guinea Highlanders and its Comparison with Pacific Peoples.

Cited by 13 publications

References 20 publications

Size relationships among permanent mandibular molars in Aboriginal Australians and Papua New Guinea Highlanders

Size relationships among permanent mandibular molars in Aboriginal Australians and Papua New Guinea Highlanders

Distribution of Tabercle-shaped Incisors in South Pacific Populations.

Short and Broad Dental Arch in Papua New Guinea Highlanders.

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