Tooth to denture base discrepancy in human evolution
Tooth to denture base discrepancy in human evolution
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人类进化中牙齿与义齿基托的差异
DOI：
10.1537/ase1911.88.69
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发表时间：
1980
期刊：
影响因子：
--
通讯作者：
N. Inoue
中科院分区：
文献类型：
--
作者：
N. Inoue
牙齿与义齿基托的差异是正畸医生提出的一种诊断方法，用于决定是否拔除恒牙进行正畸治疗。它不仅是错(牙合)畸形的主要病因之一，也是龋齿、牙周病、冠周炎、阻生牙、含牙囊肿等的主要病因之一。本文列举了这些例子(图1-3)，并从人类进化和文明的角度讨论了这种不利现象的性质和起源。作者的结论可概括为：在文明的密切影响下，特别是饮食行为的密切影响下，面骨和牙齿的减少在人类进化过程中一直在发生。然而，骨骼的减少速度更快，对周向功能刺激更不稳定，而牙齿则更稳定，因为牙冠在形成完成后没有任何重塑过程。考虑到当代错(牙合)、龋齿等相关疾病的快速增长，如果这种差异的进一步发展出现灾难性的急速发展，那么在相对较近的将来，人类咬合甚至可能会崩溃。目前对差异问题的研究使作者深刻地认识到，人类学和牙科之间的跨学科交流是非常值得的，甚至是必要的。
Tooth to denture base discrepancy is a concept which has been developed by orthodontists as their diagnostic measure for the decision of permanent tooth extraction for orthodontic treatment. It is now coming to be considered as one of the major etiologic factors, not only in malocclusion, but in dental caries, periodontal disease, pericoronitis, tooth impaction, dentigerous cyst, and so on.In the present paper, these instances were shown (Figures 1-3), and the nature and origin of this unfavorable phenomenon were discussed from the stand point of human evolution and civilization.The author's conclusive opinion may be summarized as follows: Under the close effect of civilization, especially of the eating behavior, diminution of the facial bones and the tooth has consistently taken place through the course of human evolution. However, the rate of reduction was higher in bones which is more labile to the circumferential functional stimuli, while the tooth has been more stable because the tooth crown does not have any remodeling process after the completion of its formation. Thus the disharmonious diminution of these two components of occlusion, being accompanied with the acceleration through the selection by favorable facial esthetics directed to the orthognathism, has resulted in the discrepancy.Considering the rather rapid increase of malocclusion, dental caries, and other related disorders in the present era, even collapse of human occlusion might be expected in relatively near future, if a catastrophic rush occured in further development of the discrepancy.The present study on the discrepancy problem has brought to the author the poignant realization that the interdisciplinal communication between anthropology and dentistry is really worthwhile, and even requisite for further advance in both of these fields.