Comparison of arch form between ethnic Malays and Malaysian Aborigines in Peninsular Malaysia

Abstract

ObjectiveTo determine and compare the frequency distribution of various arch shapes in ethnic Malays and Malaysian Aborigines in Peninsular Malaysia and to investigate the morphological differences of arch form between these two ethnic groups.MethodsWe examined 120 ethnic Malay study models (60 maxillary, 60 mandibular) and 129 Malaysian Aboriginal study models (66 maxillary, 63 mandibular). We marked 18 buccal tips and incisor line angles on each model, and digitized them using 2-dimensional coordinate system. Dental arches were classified as square, ovoid, or tapered by printing the scanned images and superimposing Orthoform arch templates on them.ResultsThe most common maxillary arch shape in both ethnic groups was ovoid, as was the most common mandibular arch shape among ethnic Malay females. The rarest arch shape was square. Chi-square tests, indicated that only the distribution of the mandibular arch shape was significantly different between groups (p = 0.040). However, when compared using independent t-tests, there was no difference in the mean value of arch width between groups. Arch shape distribution was not different between genders of either ethnic group, except for the mandibular arch of ethnic Malays.ConclusionsEthnic Malays and Malaysian Aborigines have similar dental arch dimensions and shapes.

Dental Arch Dimensions in Normal and Malocclusion Yemeni Samples

“…The outcomes of this study are also in line with those of Al-Khateeb and Abu Alhaija, [7] Asiry and Hashim [16] and Ling and Wong, [17] in that there was a tendency for female subjects to have narrower upper and lower dental arch widths than males at the interpremolar and intermolar regions. At the same time, the current results differ from those reported by Nojima et al [6] and Othman et al [14] who reported no significant differences across racial groups in terms of dental arch dimensions.…”

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A Preliminary Study of Malay and Chinese Bite Mark in UKM Using Dental Wax

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<p>Tipe wajah dan bentuk lengkung gigi pada mahasiswa Fakultas Kedokteran Gigi angkatan 2010-2013 Universitas Padjadjaran</p><p>Description of facial types and dental arch form of the students in the Faculty of Dentistry Universitas Padjadjaran batch 2010-2013</p>

“…4 Keseimbangan dan keharmonisan dari proporsi wajah pada umumnya akan memberikan bentuk wajah yang ideal. 5 Selain itu, bentuk wajah yang ideal dipengaruhi juga oleh bentuk lengkung gigi. Lengkung gigi dapat dijadikan sebagai faktor yang penting dalam perawatan ortodonti.…”