A biometric study of occlusion and dental arches in a series of medieval skulls from northern sweden

Lysell, L

doi:10.3109/00016355809058011

Cited by 29 publications

(11 citation statements)

References 1 publication

Supporting

Mentioning

Contrasting

Order By: Relevance

“…These changes indicate that human mandibles were still evolving, which agrees with many other studies [9][10][11]14,15,17]. Except for ramus height, the decrease of mandible dimensions with statistical significance occurred during the Bronze-Iron Ages to present day, such as bicondylar breadth, bicoronoid breadth, mandible body breadth, mandible length, bigonial breadth, and arc of mandibular bone.…”

Section: The Variations Traits Of Mandible Morphology In Holocene Chisupporting

confidence: 89%

“…The symptom of malocclusion includes dentition crowding, and discordance of teeth with alveolar bone. Considering the relatively small change in tooth dimensions in the past thousands years [9][10][11]48], the higher percentage of malocclusion may be caused by a decrease in mandibles.…”

Section: The Variations Traits Of Mandible Morphology In Holocene Chimentioning

confidence: 99%

“…Studies have shown that mandible morphology is related to food, mastication stress, cranium morphology, population history, middle cranial fossa size and weather [1][2][3][4][5]. Mandible morphology therefore may provide historical information about human food structure, evolution, migration and population relationships [6][7][8].Research has shown that human mandibles experienced morphological changes during the Holocene, and European mandibles have decreased in size in recent times [9][10][11]. A subrecent European population emerged as more different from a recent European population than other more diverse modern populations were from each other, suggesting big morphological plasticity in the mandible through time [12].…”

mentioning

confidence: 99%

“…Research has shown that human mandibles experienced morphological changes during the Holocene, and European mandibles have decreased in size in recent times [9][10][11]. A subrecent European population emerged as more different from a recent European population than other more diverse modern populations were from each other, suggesting big morphological plasticity in the mandible through time [12].…”

mentioning

confidence: 99%

See 3 more Smart Citations

The size variation and related implications of mandibles in northern China in the past 7000 years

Zhang

Zhu

2011

Chin. Sci. Bull.

View full text Add to dashboard Cite

To better understand variation of Holocene Chinese mandiblular morphology, a study was conducted on 23 metric traits of Neolithic (n=54), Bronze-Iron Ages (n=184) and modern (n=92) adult male mandibles from northern China. Results indicate that the linear characters of these Chinese mandibles evolved in the past 7000 years. From the Neolithic to Bronze-Iron Ages to present day, the overall size of mandibles decreased. The linear characters of the mandiblular features varied between different time periods. The decrease of thickness and height of the mandibular corpus primarily occurred during the Neolithic to Bronze-Iron Ages. The decrease in main size was during the Bronze-Iron Ages to present day. It is possible that mandibles became thinner before the overall size decreased. Comparisons also indicate that the bottom part of the face may have decreased more greatly in breadth than the upper portion. The decrease in mandible size may be associated with changes in climate and diet, and with changes in the craniums size. Holocene, Chinese mandibles, morphology microevolution Citation:Li H J, Zhang Q C, Zhu H. The size variation and related implications of mandibles in northern China in the past 7000 years. Chin Sci Bull, 2012, 57: 387394, doi: 10.1007/s11434-011-4808-1Mandibles play an important role in chewing. Studies have shown that mandible morphology is related to food, mastication stress, cranium morphology, population history, middle cranial fossa size and weather [1][2][3][4][5]. Mandible morphology therefore may provide historical information about human food structure, evolution, migration and population relationships [6][7][8].Research has shown that human mandibles experienced morphological changes during the Holocene, and European mandibles have decreased in size in recent times [9][10][11]. A subrecent European population emerged as more different from a recent European population than other more diverse modern populations were from each other, suggesting big morphological plasticity in the mandible through time [12]. Moore and colleagues [11] found that English mandibles decreased from the Neolithic to 20th century, especially in the ramus. Similar change was found by Lavelle [13], who showed that between Romano-British and 19th century periods, English mandibles experienced a reduction in many dimensions, without a corresponding change in teeth. However, it was not clear whether such changes took place mainly in the ramus or corpus part. Another study showed that the overall breadth of Japanese mandibles showed clear narrowing, and remarkable size reduction mainly occurred in the regions of the major masticatory muscle attachments, including coronoid process and the gonial angle [14]. The lateral corpus thickness of the Japanese mandibles also exhibited reduction, which may be the consequence of mandibular size decrease [15]. Other studies have documented similar temporal changes in Japanese mandibles [16,17].Chinese skulls also have evolved throughout the Holocene. From the Neolithic to present d...

show abstract

Section: The Variations Traits Of Mandible Morphology In Holocene Chisupporting

confidence: 89%

Section: The Variations Traits Of Mandible Morphology In Holocene Chimentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

See 2 more Smart Citations

The size variation and related implications of mandibles in northern China in the past 7000 years

Zhang

Zhu

2011

Chin. Sci. Bull.

View full text Add to dashboard Cite

show abstract

“…Evolutionary studies of the teeth and jaws show a mosaic pattern of reduction over the past 40,000 years, with jaw size reducing more than tooth size (Hyrdlieka, 1930;Lysell, 1958;Goose, 1962;Moore et al, 1968;Lavelle, 1962;Carlson, 1976;Carlson and Van Gerven, 1977;Wolpoff, 1975). This has been attributed to the fact that selective pressures involved primarily affect jaw size, and only secondarily tooth size (Sofaer, 1973).…”

mentioning

confidence: 99%

Post‐pleistocene changes in tooth root and jaw relationships

Smith

Wax

Adler

et al. 1986

American J Phys Anthropol

View full text Add to dashboard Cite

Mandibles of 126 sexed skeletal specimens, from Near Eastern sites dating over the past 12,000 years were radiographed. From the radiographs obtained, digitised tracings were made of crown length (mesiodistal), root height and width, and corpus height mesial to the premolars and first and second molars. The data obtained were analysed using rank transformation procedures. The significance of unidirectional trends in relation to periods sampled was examined graphically and analytically through linear regression analysis of the ranks on the chronological scale, and Spearman's rank correlation was used to compare relationships between different parameters of individual teeth in different periods. Significant reduction was found in crown length between 12,000 B.P. and 6,000 B.P., but no further reduction was found between 6,000 B.P. and 1,000 B.P. Little change was observed in root size, but corpus height showed significant reduction over the past 6,000 years. The differences observed in the timing and extent of reduction in crown, root, and corpus height are associated with a low intrapopulation correlation between them.

show abstract

Tooth wear and the ?design? of the human dentition: A perspective from evolutionary medicine

Kaifu

Kasai

Townsend

et al. 2003

Am. J. Phys. Anthropol.

159

124

View full text Add to dashboard Cite

Worn, flat occlusal surfaces and anterior edge-to-edge occlusion are ubiquitous among the dentitions of prehistoric humans. The concept of attritional occlusion was proposed in the 1950s as a hypothesis to explain these characteristics. The main aspects of this hypothesis are: 1) the dentitions of ancient populations in heavy-wear environments were continuously and dynamically changing owing to life-long attritional tooth reduction and compensatory tooth migration, 2) all contemporary humans inherit these compensatory mechanisms, and recent reduction in wear severity has resulted in failure to develop attritional occlusion, and 3) this failure leads to an increased frequency of various dental problems in modern societies. Because of the potential significance of this concept, we review and synthesize relevant works and discuss attritional occlusion in the light of current knowledge. Available evidence, on balance, supports the first and second points of the hypothesis. As noted by many workers, the human dentition is basically "designed" on the premise that extensive wear will occur, a conclusion that seems reasonable when one realizes that humans evolved in heavy-wear environments until relatively recently. Some dental problems in contemporary societies appear to reflect the disparity between the original design of our dentition and our present environment, in which extensive wear no longer occurs, but this possibility still needs further investigation.

show abstract

A biometric study of occlusion and dental arches in a series of medieval skulls from northern sweden

Cited by 29 publications

References 1 publication

The size variation and related implications of mandibles in northern China in the past 7000 years

The size variation and related implications of mandibles in northern China in the past 7000 years

Post‐pleistocene changes in tooth root and jaw relationships

Tooth wear and the ?design? of the human dentition: A perspective from evolutionary medicine

Contact Info

Product

Resources

About