Lingual cortical mandibular defects (Stafne's defect): an anthropological approach based on prehistoric skeletons from the Canary Islands

While posterior lingual mandibular depressions (Stafne's defect) are often discussed in clinical reports, they are rarely the subject of anthropological research. This situation is paradoxical since osteologists and skeletal biologists are in a position to enhance understanding of the trait's aetiology by systematically recording the trait in recent and prehistoric skeletal collections. This report reviews anthropological studies of cortical defects of the mandible, recommends a protocol for recording observations in trait variation, and presents new data for the prevalence of Stafne's defect—lingual cortical defects of the mandibular corpus. Among the Guanches of Tenerife in the Canary Islands (Spain), the prevalence of lingual cortical defects is 3.32% (15/452), males are more frequently affected than females, and there is a tendency for individuals with antemortem tooth loss to display larger lesions than individuals without antemortem loss of teeth. Defects of the left side are somewhat more variable in position than defects located on the right. In comparative perspective, prevalence of lingual cortical defects among the Guanches is high, given the overall 1.07% prevalence reported for archaeological series (Finnegan & Marcsik,1980), but is similar to figures reported for the Avar period sample from Hungary 3.73%. Prospects for the use of lingual cortical defects as non‐metric traits of value in population distance studies remain uncertain since variation in trait expression may have a high environmental component. However, if human osteologists routinely include observations of lingual mandibular cortical defects in their analysis of skeletal collections, the data required to elucidate factors responsible for the trait's cultural, ecological, temporal and geographical patterning will more rapidly become established. Copyright © 2002 John Wiley & Sons, Ltd.     

Dental disease in the Nile Valley during the New Kingdom

This study examines evidence for dental disease (caries, abscesses, antemortem tooth loss and severity of dental wear) in Nubian and Egyptian groups living in the Nile Valley during the New Kingdom. Specific attention is given to individuals buried at the site of Tombos, a cemetery in Nubia used during the Egyptian colonial occupation. In addition, three Nubian and two Egyptian samples are included for comparative purposes. While some similarities in condition frequencies between Tombos and the comparative groups are apparent, especially in the rates of caries and abscesses, significant differences in antemortem tooth loss and severity of tooth wear point to variation in these Nile Valley samples. These differences are especially evident for males. Higher rates of these conditions at Tombos may be attributed to the socio‐political and cultural changes taking place during this time of colonial occupation. Changes in foodways and occupational environments may have resulted in stress, as demonstrated by these dental conditions experienced by the Tombos people throughout this transitional period. Copyright © 2009 John Wiley & Sons, Ltd.     

Pulp Stones Prevalence in a Historical Sample from Radom,Poland (ad 1791–1811)

This paper provides an investigation of pulp stones in a sample drawn from the historical population of Radom, Poland, dating to between ad 1791 and 1811. This study seeks to determine the frequency of pulp stones, and assess the association between pulp stones and sex, age, dental caries, and dental wear. A total of 780 teeth from 121 adult individuals of both sexes (45 females, 76 males) were examined. Analysis was limited to molars. The average age‐at‐death of each individual was estimated. Total wear scores across the molars were calculated for each individual. Pulp stones were identified by a portable dental X‐ray machine. Pulp stones were found in 94 of 121 individuals and in 273 of 780 molars. No statistically significant correlation was found between pulp stones and age‐at‐death (p  = 0.7625) and sex (p  = 0.0915), but a significant relationship was found between pulp stones and dental wear (p  < 0.0001) and dental caries (p  = 0.0016). Our study found that molars affected by highly advanced dental wear were significantly more often accompanied by pulp stones than molars that had experienced limited wear. Similarly, significant correlations were observed for dental caries. It means that pulp stone formation appears to have been contingent upon the irritation of the tooth crown by factors such as forces acting on the tooth crown leading to dental wear or dental caries. Copyright © 2016 John Wiley & Sons, Ltd.     

Molar crown height: not always a reliable method for the evaluation of age-at-death

In this study, we tested the validity of molar crown height, which changes according to the degree of tooth wear, for the evaluation of age-at-death. The sample consisted of 372 first and second molars (lower and upper) from 157 individuals of known sex and age-at-death. For each molar, we measured the height of the two cusps most subjected to wear (protocone and hypocone for the upper M1 and M2; protoconid and hypoconid for the lower M1 and M2). The correlation between crown height and age-at-death was assessed by linear regression analysis. The resulting models were not very robust since a significant correlation was only found for a small part of the sample, at best (maxillary M1) around 35%. The result slightly improved when bucco-lingual diameter (BL diameter), ante-mortem tooth loss and dental caries were considered, mainly for the maxillary M2 for which the model using age-at-death and BL diameter as independent variables explained 47% of the sample (p < 0.001).     

Dental Wear and Pathology in the Precolonial Caribbean: Evidence for Dietary Change in the Ceramic Age

This study investigates temporal changes in dietary practices in the Caribbean archipelago during the Ceramic Age (400 BC–AD 1500), through analyses of dental wear and pathology. Some previous studies in the region have suggested that diet and subsistence practices changed over time due to increasing sociopolitical complexity, climate change, or adaptation to island environments rich in marine resources. Both horticultural/agricultural intensification and increased marine focus of the diet over time have been posited, based among other things on faunal and botanical remains, and early ethnohistorical accounts. Local and micro‐regional stable isotope studies of temporal dietary variation have found few indications for change over time, and large regional isotope studies are still lacking. Dentitions from sites throughout the region dating to the Early Ceramic Age (400 BC–AD 600/800) and the Late Ceramic Age (AD 600/800–1500) were analysed in order to assess temporal differences. Intra‐individual rates of wear were calculated using the difference in degree of wear between the adjacent molars and the two groups were compared with principal axis analysis. Caries, antemortem tooth loss, abscesses and dental calculus were recorded per individual and per tooth/socket, and population caries and antemortem tooth loss rates were assessed and compared by age group, tooth class and sex. Comparisons between the two occupation periods revealed significant differences in the rate of dental wear and pathology, indicating a shift in dietary practices over time, coinciding with known social changes. The increase in pathology rates suggests a rise in the consumption of cariogenic foods or preparation techniques that increase cariogenicity. The decrease in rate of wear over time indicates a reduction in abrasivity of the diet. Together these data suggest that there was a growing focus on refined, cariogenic foods, likely horticultural/agricultural produce. Copyright © 2014 John Wiley & Sons, Ltd.     

Fruits of Their Labour: Urbanisation,Orchard Crops,and Dental Health in Early Bronze Age Jordan

The analysis of dental remains, which outlast most other tissues in the human body, provides insight into past diet, activity patterns and ancestry. The remains from Bab edh‐Dhra' represent the only skeletal sample available to assess the impact of agricultural intensification in the Early Bronze Age of the southern Levant (ca. 3500–2000 bce ). This era ushered in a period of ‘urbanisation’, evidenced by fortified towns, planned roadways, developments in irrigation and growing population density. During this time, the cultivation, trade and consumption of orchard taxa (such as figs, grapes and olives) increased. This paper examines changes in the teeth associated with agricultural intensification involving orchard crops as well as grains. Dental caries, ante mortem tooth loss and dental wear are examined for Early Bronze IA (EBIA; 3500–3300 bce ) and Early Bronze II–III (EBII–III; 3100–2300 bce ) teeth from the site of Bab edh‐Dhra', located in modern‐day Jordan. Due to the commingling, general tooth groups (e.g. molars) and specific tooth types (e.g. lower left canine) were used to compare periods. Although age and sex could not be identified for every tooth, analyses of crania and os coxae showed no significant difference in demographic profiles of EBIA and EBII–III. No statistically significant increase was found over time in dental caries frequency; however, teeth for which the cause of pulp exposure could be determined suggested that caries increasingly led to exfoliation. Indeed, ante mortem tooth loss rose significantly with time, whereas dental wear decreased. In general, changes in oral health were consistent with an archaeological record of greater consumption of softer, stickier foods, such as fruits. Copyright © 2013 John Wiley & Sons, Ltd.     

Dental chipping: Contrasting patterns of microtrauma in inuit and European populations

While the study of dental wear has enjoyed wide popularity for over 100 years, dental chipping, or microfractures of the tooth crown, has received little attention. Observations on dental chipping in populations from the Arctic (St. Lawrence Island, Alaska) and Europe (medieval Norway and Spain) reveal patterns of microtrauma that provide insights into the dietary and tooth‐tool use behaviour of earlier populations. St. Lawrence Island Inuit, with an emphasis on consuming tough and frozen foods, in combination with extensive tooth‐tool use, exhibit a pattern of chipping that is characterised as ‘molar dominant’. The two European samples exhibit an ‘incisor‐dominant’ pattern but contrast markedly in frequencies, with medieval Norwegians showing significantly more chipping than medieval and post‐medieval Spanish. The systematic study of chipping promises to provide a new perspective on how populations used and/or abused their dentitions in earlier times. Copyright © 2010 John Wiley & Sons, Ltd.     

Dental pathology and diet at Apollonia,a Greek colony on the Black Sea

Dental pathology has the potential to provide insight into the composition of the diet and to reveal dietary differences based on age, sex and social status. Human skeletal remains from the Greek colonial site of Apollonia (5^th to 2^nd centuries BC) on the Black Sea coast of Bulgaria were analysed for various forms of dental pathology in order to: assess the prevalence of dental disease in the population; compare the dental pathology data from Apollonia with dietary data derived from ancient literary texts and from previous stable isotopic analysis of the colonists' remains; explore variations in dental disease with respect to age and sex; and compare the prevalence of dental pathology in the Apollonians with that of other Greek populations. The composition of the diet, as indicated by the dental pathology data, is consistent with the stable isotopic evidence from Apollonia and with the ancient literary texts, both of which indicate the consumption of a relatively soft, high carbohydrate diet. The higher frequency of dental caries, abscesses, calculus, and antemortem tooth loss in older adults compared with younger ones reflects the age‐progressive nature of these conditions. The lack of significant sex differences in caries, abscesses, calculus and tooth loss corresponds with the stable carbon and nitrogen isotopic data derived from bone collagen, which indicate no significant sex differences in the consumption of dietary protein. In contrast, these findings conflict with the ancient literary texts, which refer to distinct dietary differences between males and females, and with the stable carbon isotopic values derived from bone carbonate, which indicate sex differences with respect to the overall diet. Despite the lack of marked sex differences in dental pathology, overall trends point to subtle dietary differences between males and females. A greater degree of tooth wear in males also hints at possible sex differences in the use of the teeth as tools. Copyright © 2007 John Wiley & Sons, Ltd.     

Cultural Modification of the Dentition in Prehistoric Cambodia

Intentional dental modification, in the form of ablation and filing, is reported for the first time from Cambodia in two late prehistoric sites (Phum Snay and Phum Sophy, c. 2500 to 1500 bp ). Bioarchaeological research is relatively new for this region, and this study significantly adds to our reconstruction of past behaviours in mainland Southeast Asia. The skeletal samples combine both excavated material and large looted collections in the form of ossuaries. People from Phum Sophy and Phum Snay had similar rates of anterior maxillary dental ablation, 60 and 47%, respectively, and 21.4 and 7.7%, respectively, in the mandible. Patterns of ablation most commonly involve the removal of the maxillary lateral incisors. Intentional filing was less common than ablation but affected Phum Snay and Phum Sophy individuals to a similar level (4–7%). Filing was also restricted to the anterior dentition, and a range of patterns were evident, many involving filing of the mesial and distal aspects of the crown of the upper and lower incisors and canines to give a pointed appearance. Patterns of ablation or filing were not strongly associated with a particular sex or age group. However, a limited number of ablation and filing patterns were exclusive to each site. The significance of this practice in relation to rites of passage, status, community and family relationships, and trauma is discussed. It is also shown that the modifications show distinct differences in prevalence and pattern, particularly that of filing, to nearby temporal neighbours in southern Cambodia and northeast Thailand, suggesting a unique cultural behaviour for this region. Copyright © 2011 John Wiley & Sons, Ltd.     

Dental status of Napoleon's Great Army's (1812) mass burial of soldiers in Vilnius: childhood peculiarities and adult dietary habits

A mass grave of the soldiers of Napoleon's Great Army, containing no less than 3269 individuals who died during the retreat from Russia in December 1812, was uncovered during an archaeological rescue excavation in 2002 in Vilnius, Lithuania. General dental analysis, including that of dental wear, tooth loss, caries, calculus, and periodontal diseases and abscesses, was used to evaluate the oral health status and possible dietary patterns of individuals who represented recruits from almost all of Western and Central Europe. Growth conditions in childhood were studied by scoring of linear enamel hypoplasia. In all, 293 individuals (6528 teeth) were selected for the analysis; 20–30 year old males made up the majority of the sample. Their general dental status is characteristic of young individuals: low dental attrition and antemortem tooth loss, as well as low prevalence of calculus and abscesses. The caries rate was average compared with late Medieval/early industrial populations and typical for individuals with diverse diets. However, a considerable amount of pulp caries and a high number of carious teeth in some individuals indicate consumption of cariogenic products (e.g. sugar, sweet drinks) and poor oral hygiene. The frequency and severity of hypoplasia was lower compared with other populations of that time, suggesting the selection of the fittest individuals for military service; this correlates with the historically known selection criteria of that period. Copyright © 2006 John Wiley & Sons, Ltd.     

Periapical lesions and dental wear in the early Maori

Dental wear and intrabony lesions were evaluated in a sample of 225 skulls (136 male) of pre‐contact New Zealand Maoris. The degree and direction of surface wear was scored according to the method of Molnar ( Molnar 1971 . Human tooth wear, tooth function and cultural variability. American Journal of Physical Anthropology34: 175–190) and revealed severe surface loss in both males and females with horizontal wear being the dominant pattern (62.4% male, 57.5% female). The width of coronal tissue above the pulp chamber, as well as the maximum depth and width of periapical lesions, was measured from both standard radiographs and digital images. The high prevalence of periapical pathology in the Maori underlined the extreme nature of dental wear in these people. It is postulated that this degree of tooth loss may be attributable to a change in diet from large birds to marine‐dependence, the introduction of the kumara to New Zealand, dental erosion and finally, to the excessive masticatory forces exerted by a robust facial complex on normally sized teeth. Fenestrated lesions were highly prevalent (83% of skulls) and were centered mostly on the maxilla, with an even distribution among tooth classes. The finding of periapical lesions in teeth with minimal observable wear was attributed to traumatic occlusion. Copyright © 2001 John Wiley & Sons, Ltd.     

Prehistoric dental disease and the dietary shift from cactus to cultigens in northwest Mexico

Differences in dental health of prehistoric human groups are commonly attributed to specific subsistence practices, whereby food foragers generally have a lower incidence of dental disease than agriculturalists. Dental health was assessed on a sample of 135 human skeletons from northwest Mexico that date to the Early Agricultural period (1600 BC–AD 200), which coincides with the initial introduction of domesticated cultigens into the region c. 2000 BC. High rates of dental caries (13.5%) and antemortem tooth loss (17.6%) encountered in these prehistoric forager‐farmers from the Sonoran Desert were determined to be the result of the consumption of highly cariogenic local wild resources such as cactus. These patterns mask the degree of reliance on agriculture in the area and highlight the importance of constructing local nutritional histories to better understand the diversity of human diets and their relationships to health and disease. Copyright © 2007 John Wiley & Sons, Ltd.     

Sex assessment of medieval Norwegian skeletons based on permanent tooth crown size

The excavation of the Library site in Trondheim uncovered the medieval cemetry of St. Olav's church containing 388 skeletons, of which 248 had skulls with teeth. Sex assessment was based on osteological criteria, and for 145 skeletons sex classification was performed with a high degree of certainty. The remaining 103 were classified as uncertain male, uncertain female and sex undetermined. Mesio-distal and facio-lingual crown widths of permanent teeth in the group of reliably assessed males and females were used in sex-discriminant analyses. A combination of two or more teeth was less effective in discrimination than using one tooth alone. This was due to missing data in the combined variable sets and thereby loss of cases. Missing variables were due to post-mortem tooth loss, attrition or large deposits of calculus. The teeth were ranked according to their power in sex discrimination. The left maxillary first molar (26) represented by its facio-lingual dimension was the best sex discriminator (classified 85 per cent of the cases correctly), followed by the right maxillary first molar (16) also represented by its facio-lingual dimension (classified 77 per cent correctly). With only one variable in the discriminant function, a critical value could be calculated and tabulated for each tooth. This was used in sex assessment of the osteologically undetermined and uncertain groups. Only variables that could sex classify correctly at least 70 per cent of the cases with the Jack-knife procedure were used. Sex assessment could be made for 16 of 24 (66.7 per cent) of the osteologically sex-undetermined adult individuals and for 21 of 44 (47.7 per cent) of the children. Of 35 osteologically uncertainly sex-assessed skulls, only nine (six men and three women) corresponded with dental classification.     

Dental evolution in prehistoric Native Americans of the Ohio valley area. I. Wear and pathology

Temporal patterns of tooth wear rates (loss of crown height) and dental pathologies (caries, abscess, and tooth loss) are estimated for 40 Native American populations of the upper Ohio River valley area ranging in time from the Late Archaic (ca. 3500 years BP ) to Protohistoric times (ca. 350 years BP ). Within this time span three ‘dental cultural ecological environments’ are recognized: high rates of wear, low frequencies of pathology (Late Archaic), low rates of wear, low frequencies of pathologies (Woodland, ca. 2500–1000 years BP ), and low rates of wear and high frequencies of pathologies (Late Prehistoric, ca. post-1000 years BP ). Phenotypic selection acting to maintain tooth size is associated with pre-ceramic, hunter–fisher–gatherers in the first dental environment. The introduction and development of ceramics at the end of the Late Archaic is associated with significant reduction in tooth wear rates and reduction in size of maxillary teeth, most likely due to selection. From at least the Middle Woodland period (ca. 2000 years BP ) to the end of the time sequence considered, tooth size in Ohio Valley Native Americans was stable, with minor fluctuations due to genetic drift. At present there is no evidence that major changes in diet at the beginning of the Late Prehistoric period affected tooth size, even though the frequencies of dental pathologies increased dramatically. © 1997 John Wiley & Sons, Ltd.     

Dental Pathology,Trauma and Attrition in a Zambian Iron Age Sample: A Macroscopic and Radiographic Investigation

Using morphological and radiographic methods, we analysed the dentitions of 24 individuals from Ingombe Ilede and Isamu Pati Zambian Iron Age archaeological sites. In this study, we determined the frequency and distribution of attrition, pathological conditions and dental trauma. This research also presents the first view of dental health for an Iron Age population in southern Africa. In total, 482 teeth were available for this study with 287 teeth missing, where 50 of these were lost antemortem and one individual had an erupted supernumerary first mandibular incisor. With the use of radiography and morphology, 21.5% (104/482) of the analysed teeth had at least one pathological condition or evidence of dental trauma. Some interesting dental aspects found and discussed in this paper are linear enamel hypoplastic lesions, radicular resorption, periapical lesions, fractures, dental modification and carious lesions. Many of these features were diagnosed with radiography, and this was especially important for those found below the cemento‐enamel junction (p = 0.0202) that are less obvious with macroscopic investigation alone. Additionally, the quantity and direction of dental attrition was studied. There were observed sex differences with the direction of wear, likely representing a sex‐specific cultural practice of using teeth as tools. Overall, the results show that this sample suffered relatively little from dental problems, and many of those observed features were associated with the traumatic procedure of dental modification, whereas others were age and diet‐related. Additionally, with the use of radiography, rare dental fractures and other features were diagnosed; these results demonstrate the requirement for its application in dental studies on archaeological assemblages. Copyright © 2012 John Wiley & Sons, Ltd.     

Para-masticatory wear facets and their functional significance in hunter–gatherer maxillary molars

The mastication of tough and hard foods combined with the extensive use of teeth as tools, have been considered possible antemortem causes in determining enamel microfractures of the tooth crown. This phenomenon, known as dental chipping, has been found in different fossil hominins and in several pre-historic and historic human populations who adopted different subsistence strategies. However, little is understood of the mechanism, function and the formation of dental chipping.     

Comparing methods for analysing mortality profiles in zooarchaeological and palaeontological samples

In this study, I examine three methods that are currently used for comparing mortality profiles from zooarchaeological and palaeontological samples: (1) histograms with 10% of life‐span age classes; (2) boxplots showing tooth crown height medians; and (3) triangular plots of the proportions of young, prime and old animals. I assess the advantages and disadvantages of each method using data collected on two samples of Northern Yellowstone elk (Cervus elaphus nelsoni) with known, or cementum annuli‐determined, ages at death. One sample was hunted by wolves (n = 96), and the other was hunted by recent humans using rifles (n = 226). I tested each method with the known or cementum annuli age distributions and with age estimation techniques appropriate for archaeological assemblages. Histograms are best used when the relationship between dental eruption/attrition and age is well established so that individuals can be confidently assigned into 10% of life‐span groups, and when more than 30 or 40 individuals are present in the assemblage. Boxplots employ raw crown heights, thus removing the error introduced by assigning specimens to age classes, and therefore they allow the analysis of species where the relationship between dental eruption/attrition and age is unknown. Confidence intervals around the medians allow samples to be statistically compared. Triangular plots are easy to use and allow multiple samples and species to be considered simultaneously, but samples cannot be statistically compared. Modified triangular plots bootstrap samples to provide 95% confidence ellipses, allowing for statistical comparisons between samples. When possible, samples should be examined using multiple methods to increase confidence in the results. Copyright © 2005 John Wiley & Sons, Ltd.     

Dental health at the transition from the Late Antique to the early Medieval period on Croatia's eastern Adriatic coast

Dento‐alveolar pathologies: caries, ante mortem tooth loss, abscesses, calculus, alveolar resorption and tooth wear were analysed in two composite skeletal series from Croatia's eastern Adriatic coast (Dalmatia). The first consists of 103 skeletons from seven Late Antique (3rd–6th century AD) sites, the second of 151 skeletons from three Early Medieval (7th–11th centuries AD) sites. As recent bioarhaeological studies (Šlaus, 2008 ) showed a significant increase of disease loads and trauma frequencies in Dalmatia during the Early Medieval period, the aim of this study was to investigate whether dental health was equally adversely affected by the Late Antique/Early Medieval transition. The results of our analyses show that the frequencies of carious lesions, ante mortem tooth loss, abscesses and alveolar resorption increased significantly during the Early Medieval period, as did the degree of heavy occlusal wear on posterior teeth. These data suggest a change in alimentary habits, with a significantly higher dependence on carbohydrates and a greater reliance on hard, fibrous foods requiring vigorous mastication in the Early Medieval diet. The combination of higher calculus and lower caries rates in the Late Antique series similarly suggests more protein in the Late Antique diet and is, therefore, also consistent with the hypothesised change in alimentary habits. In general (the two exceptions are male caries and female alveolar resorption frequencies) lesion frequencies increased uniformly in both sexes suggesting that the deterioration of dental health during the Early Medieval period equally affected males and females. Cumulatively, the collected data suggest that the political, social, economic and religious changes that characterised the Late Antique/Early Medieval transition in Dalmatia resulted in a clear discontinuity, not only from the cultural, but also from the biological point of view with an evident deterioration of oral health during the Early Medieval period. Copyright © 2010 John Wiley & Sons, Ltd.     

Dental Health of Free Blacks in New York State during the Mid‐19th Century

The current research will examine the frequency of carious teeth, periapical abscesses and ante‐mortem tooth loss in the Newburgh Colored Burial Ground (1830–1870), a free black cemetery in Newburgh, New York. The Newburgh material is compared with skeletal samples from the New York African Burial Ground, New York State almshouses, a free black cemetery from Philadelphia and middle‐class/upper‐class European cemeteries. Although previous research suggests that dental health became worse throughout the 19th century, there is no consistent pattern between the 17th‐century and 18th‐century skeletal sample of enslaved blacks from New York City and 19th‐century free blacks from Newburgh and Philadelphia. The frequency of dental caries does increase through time but the other indicators change little (equal or fewer ante‐mortem tooth loss) or suggest an improvement in dental health (fewer periapical abscesses) through time. Relative to contemporaneous populations, the individuals from Newburgh appear much more similar in terms of dental health to upper‐class and middle‐class European groups than to the other marginalised groups considered in this research. The impact of the economic, political and social changes that accompanied the Industrial Revolution and their potential impact on dental health are considered. Copyright © 2011 John Wiley & Sons, Ltd.