撒哈拉以南非洲人永久牙的形成:流行,模式,解释
1Research Centre in Evolutionary Anthropology and Palaeoecology, School of Biological and Environmental Sciences, Liverpool John Moores University, Liverpool L3 3AF, UK.
Archives of oral biology
|March 28, 2024
概括
牙发育,牙的先天性缺失,在撒哈拉以南非洲人中相对不常见. 这项研究发现UI2-LP2和M3发生率在不同地区和性别之间很低.
科学领域:
- 古人类学古人类学.
- 物理人类学 物理人类学
- 牙科人类学 牙科人类学
背景情况:
- 牙发育,牙的先天性缺失,是人类常见的发育异常.
- 在全球人口中,患病率有很大差异.
- 关于撒哈拉以南非洲人口的数据,特别是来自前现代样本的数据,很少.
研究的目的:
- 呈现关于现代和前现代撒哈拉以南非洲人的牙发育的区域和性别特定数据.
- 将这些发现与全球流行率进行比较.
- 为牙科临床医生和人类学家提供见解.
主要方法:
- 分析了52个撒哈拉以南非洲样本的骨牙 (n=2162).
- 分类为现代和前现代群体,区域聚合.
- 统计分析包括95%的置信区间和UI2,LI1,UP2,LP2,UM3和LM3的生成的千平方测试.
主要成果:
- 现代个体显示2.3%的UI2-LP2生成和7.0%的M3生成;前现代个体显示0.6%的UI2-LP2生成和8.5%的M3生成.
- 区域和性别差异通常不显著,尽管女性患病率较高.
- 在现代样本中,M3发生率在中部和东部/南部地区之间存在显著差异.
结论:
- 撒哈拉以南非洲人中牙衰老的流行率处于全球范围的底部.
- 微不足道的区域间差异表明撒哈拉以南地区人民的总体代表性.
- 这些发现可以为人类学研究提供信息,并帮助临床医生根据人口祖先量身定制患者治疗.
相关概念视频
01:15Teeth
406
The formation of teeth, also known as odontogenesis, is a complex process that begins in utero, around the sixth week of embryonic development. There are three stages to this process: the bud stage, the cap stage, and the bell stage.
In the bud stage, the tooth germ (an aggregation of cells) starts to form in the developing jawbone. During the cap stage, the tooth germ differentiates into enamel organ, dental papilla, and dental sac, which will later develop into the tooth's enamel, dentin...
In the bud stage, the tooth germ (an aggregation of cells) starts to form in the developing jawbone. During the cap stage, the tooth germ differentiates into enamel organ, dental papilla, and dental sac, which will later develop into the tooth's enamel, dentin...
406
01:21Tooth Anatomy
461
The human tooth enables us to eat a variety of foods, speak clearly, and even aid in shaping our faces. Teeth are composed of various elements that work together. Here's a detailed look at the anatomy of a human tooth.
The Crown, Neck, and Root
The visible part of the tooth is referred to as the crown. It's covered by enamel, the hardest substance in the human body. The crown is uniquely shaped for each type of tooth, allowing for different functions such as cutting, tearing, or...
The Crown, Neck, and Root
The visible part of the tooth is referred to as the crown. It's covered by enamel, the hardest substance in the human body. The crown is uniquely shaped for each type of tooth, allowing for different functions such as cutting, tearing, or...
461
01:22Sutures of the Skull
6.7K
The human skull is composed of several bones that come together to protect the brain and support the structures of the face. The junctions where these bones meet are called sutures.
Sutures are immobile joints between adjacent bones of the skull. The narrow gap between the bones is filled with dense, fibrous connective tissue that unites the bones. The long sutures located between the skull bones are not straight but instead follow irregular, tightly twisting paths. These twisting lines tightly...
Sutures are immobile joints between adjacent bones of the skull. The narrow gap between the bones is filled with dense, fibrous connective tissue that unites the bones. The long sutures located between the skull bones are not straight but instead follow irregular, tightly twisting paths. These twisting lines tightly...
6.7K
01:16Psychosexual Stages of Personality: Oral
718
The oral stage is the initial phase of Sigmund Freud's theory of psychosexual development, occurring from birth to approximately 12 to 18 months. During this period, the infant's mouth serves as the primary source of pleasure, with actions such as sucking, chewing, biting, and drinking playing a crucial role in reducing tension. These activities are essential not only for nourishment but also for the infant's psychological and emotional satisfaction.
Weaning, typically occurring...
Weaning, typically occurring...
718
02:31Synteny and Evolution
3.3K
John H. Renwick first coined the term “synteny” in 1971, which refers to the genes present on the same chromosomes, even if they are not genetically linked. The species with common ancestry tend to show conserved syntenic regions. Therefore, the concept of synteny is nowadays used to describe the evolutionary relationship between species.
Around 80 million years ago, the human and mice lineages diverged from the common ancestor. During the course of evolution, the ancestral...
Around 80 million years ago, the human and mice lineages diverged from the common ancestor. During the course of evolution, the ancestral...
3.3K