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Tooth transposition prevalence and type among sub-Saharan Africans.

Published on Mar 1, 2020in American Journal of Health Behavior
· DOI :10.1002/AJHB.23329
Joel D. Irish23
Estimated H-index: 23
(LJMU: Liverpool John Moores University)
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Abstract
Objectives: Although rare, tooth transposition—an exchange in location of two teeth—is a frequent topic of study. Clinical and, to a much lesser extent, dental anthropological research have focused predominantly on prevalence (0.03%‐0.74% in several world populations) and case studies, albeit on a restricted spatiotemporal scale. Many regions have received little attention, including sub‐Saharan Africa, while premodern data are few. Here, the aim is to supplement both fields of dental research by reviewing previous publications, and newly reporting transposition rates, types, and co‐occurring abnormalities in time‐successive samples across the subcontinent. Methods: Dental data in 51 sub‐Saharan samples (>2500 individuals) dating >10 000 BC to 20th century were recorded. Of these, 36 are of modern and 15 premodern age, comprising males and females ≥12‐years of age. Transposition presence, quadrant, and type were tabulated, cases described, and prevalence presented. In the latter case, Poisson 95% confidence intervals were calculated to better discern true population rates at various geographic levels. Results: Overall, six of 1886 modern individuals (0.32%) and one of premodern age evidence Mx.C.P1, an exchange of the maxillary canine and first premolar. Various associated dental abnormalities are also evident, including retained deciduous teeth, reduced permanent crowns, and agenesis. Conclusions: This study provides additional insight into the geographic distribution, features, and time depth of transposition, along with hints supporting a genetic etiology and, potentially, some indications of diachronic change from an initial Mx.C.P1 to several types more recently based on premodern evidence. It is of clinical concern today, but is not just a modern anomaly.
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#1Joel D. Irish (LJMU: Liverpool John Moores University)H-Index: 23
#2Shara E. Bailey (NYU: New York University)H-Index: 21
Last. Lee R. Berger (University of the Witwatersrand)H-Index: 36
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Abstract A new species of Homo, Homo naledi, was described in 2015 based on the hominin skeletal remains from the Dinaledi Chamber of the Rising Star cave system, South Africa. Subsequent craniodental comparative analyses, both phenetic and cladistic, served to support its taxonomic distinctiveness. Here we provide a new quantitative analysis, where up to 78 nonmetric crown and root traits of the permanent dentition were compared among samples of H. naledi (including remains from the recently di...
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#1Arianne LewyllieH-Index: 1
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The 22q11.2 deletion syndrome (22q11.2DS) is one of the most frequent microdeletion syndromes and presents with a highly variable phenotype. In most affected individuals, specific but subtle facial...
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#1Joel D. Irish (LJMU: Liverpool John Moores University)H-Index: 23
OBJECTIVES: For bioarchaeological biodistance analyses it is common to "assume" that skeletal samples are representative of the populations to which they are attributed. Here, alternatively, samples with "known" attribution in the Raymond A. Dart Collection are assessed regarding their suitability for use in such analyses. Prior curation issues may call their ascribed identities into question. MATERIALS AND METHODS: These 20th century samples ostensibly derive from South African Ndebele, Sotho, ...
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#1Joel D. Irish (LJMU: Liverpool John Moores University)H-Index: 23
#2Wendy Black (UCT: University of Cape Town)H-Index: 1
Last. Rebecca Rogers Ackermann (UCT: University of Cape Town)H-Index: 22
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The present report follows up on the findings of previous research, including recent bioarchaeological study of well-dated Khoesan skeletal remains, that posits long term biological continuity among the indigenous peoples of South Africa after the Pleistocene. The Arizona State University Dental Anthropology System was used to record key crown, root, and intraoral osseous nonmetric traits in six early-through-late Holocene samples from the Cape coasts. Based on these data, phenetic affinities an...
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#1Shuchi Tripathi (King George's Medical University)H-Index: 4
#2Raghuwar D Singh (King George's Medical University)H-Index: 8
Last. Deeksha Arya (King George's Medical University)H-Index: 5
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Abstract Tooth transposition is a severe disturbance of tooth eruptive position and their sequence, which involve certain teeth occurring at any of several specific sites in the mouth. Tooth transposition is of several types and their classification depends on the teeth involved. The review of literature aims to discuss the incidence and identifying factors related to occurrence of this dental anomaly. The present study aims to discuss about the prosthetic treatment of a patient with unilateral ...
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#1Joel D. IrishH-Index: 1
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#1Sabrina B. Sholts (UCSB: University of California, Santa Barbara)H-Index: 13
#2Anna Clement (UCL: University College London)H-Index: 5
Last. Sebastian K.T.S. Wärmländer (UCSB: University of California, Santa Barbara)H-Index: 21
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This article identifies and discusses seven new cases of complete maxillary canine-premolar transposition in ancient populations from the Santa Barbara Channel region of California. A high frequency of this tooth transposition has been previously documented within a single prehistoric cemetery on one of the Channel Islands. A total of 966 crania representing 30 local sites and about 7,000 years of human occupation were examined, revealing an abnormally high prevalence of this transposition trait...
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#1Joel D. Irish (UAF: University of Alaska Fairbanks)H-Index: 23
The mean measure of divergence (MMD) distance statistic has been used by researchers for nearly 50 years to assess inter-sample phenetic affinity. Its widespread and often successful use is well documented, especially in the study of cranial and dental nonmetric traits. However, the statistic has accumulated some undesired mathematical baggage through the years from various workers in their attempts to improve or alter its performance. Others may not fully understand how to apply the MMD or inte...
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ABSTRACT Objective: To synthesize currently existing data and investigate the prevalence of tooth transposition as well as its relation to gender, dental arch, and quadrant occurrence. Materials and Methods: Several electronic databases were searched in order to identify the potentially relevant studies. Initially, 591 papers were retrieved. After applying specific inclusion and exclusion criteria, nine studies were eligible for inclusion in this evaluation. Meta-analysis was performed by determ...
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Abstract This paper defines tooth transposition and discusses its history, incidence and possible etiology. An interesting parallel is drawn between tooth transposition and other dental anomalies (number, size, shape and location of teeth). Treatment options are discussed in terms of the age at which the transposition is discovered, as well as in terms of severity and completeness of the anomaly. While a logical and relatively predictable treatment solution should normally be considered, in some...
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