中国组织工程研究

中国组织工程研究 ›› 2012, Vol. 16 ›› Issue (50): 9349-9356.doi: 10.3969/j.issn.2095-4344.2012.50.008

• 口腔组织构建 oral tissue construction • 上一篇    下一篇

健康人第一磨牙牙合面磨耗面的分布

白兰军1，刘 浩2，罗 云3，王 敏3   

  • 出版日期:2012-12-09 发布日期:2012-12-09

Distribution of first molar occlusal wear facets in healthy people   

Bai Lan-jun1, Liu Hao2, Luo Yun3, Wang Min3   

  • Online:2012-12-09 Published:2012-12-09

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摘要：

背景：人类天然牙的牙面的磨耗痕迹具有丰富的个体生活、食物、咀嚼和习惯信息，对齿科治疗和修复具有很重要的意义，至今国内外对牙磨耗面宏观和微观方面的研究主要还是集中在对古人类饮食结构变化的研究和通过对磨耗面的研究来区别不同的物种等方面。
目的：实验旨在观察不同年龄健康人群第一磨牙牙合面磨耗面的分布及显微结构。
方法：选取健康志愿者作为研究对象，按年龄段20-29岁，30-39岁, 40-49岁分为3组，以此制备每个志愿者牙列的石膏模型。按照磨耗面数字标记系统辨别各个磨耗面并进行编号。分别对每个模型上第一磨牙出现的磨耗面进行记录。对有年龄记录的离体下颌第一磨牙牙合面磨耗面进行电镜扫描观察，对扫描图像上磨耗面显微结构上的凹面和刮痕进行观察分析。
结果与结论：各年龄组上颌磨耗面10与下颌磨耗面7，10 出现的频率随年龄增加而增加(P < 0.05)，电镜观察结果显示，每个年龄组的磨耗面的显微磨耗情况凹面和刮痕具有各自特异磨耗情况。说明不同年龄健康人群第一磨牙牙合面磨耗面的显微磨耗具有特异性。

Abstract:

BACKGROUND: Information about life, food, and mastication behavior during the lifespan of an individual is encoded in the dental occlusal wear pattern. It has a profound significance in tooth treatment and restoration. Studies on tooth macrowear and microwear are rare, and mainly emphasize the field of palaeoanthropology and discrimination of different species. Few studies are focused on the application of the wear facet to the dental clinical and individual identification.
OBJECTIVE: To investigate the distribution and microwear pattern of first molar wear facet, and to explore the potential value in first molar wear facet for dental clinic and individual identification.
METHODS: We chose 45 health volunteers as research subjects, and divided them into three groups, age 20-29 years, age 30-39 years, age 40-49 year. Each group had 15 persons. Then plaster modes were prepared in all the volunteers. The wear facets appearing on the first molar were recorded. The microwear patterns of the first molar were analyzed.
RESULTS AND CONCLUSION: As age increased, the appearance frequency of wear facet 10 in the maxillary first molar and wear facets 7, 10 in the mandibular first molar was increased (P < 0.05). The microwear pattern was different in different age groups.