Schroeder H E
Abteilung für Orale Strukturbiologie, Zahnärztliches Institut der Universität Zürich.
Schweiz Monatsschr Zahnmed. 1991;101(3):279-84.
The speed that a tooth bud or growing tooth attains on its way to the level of occlusion merits biological and clinical interest. In this work, all data available in the literature related to the eruptive movement of the various permanent teeth in man, both prior and after their clinical emergence in the oral cavity, have been gathered and recalculated in rates of movement per day. For comparative purposes, the rates of migration of nonerupted teeth, of bone resorption and bone apposition, as well as the rate of elongation of growing tooth roots were also collected from the literature. The standardized data (rates in micron/day) revealed the intraosseous movements of tooth buds and growing teeth are dependent and limited in speed by the rates of bone resorption and bone apposition. The extra-alveolar movement of clinically visible tooth crowns on their course of prefunctional eruption occurs at a much higher speed which probably results from a combination of the rate of bone apposition in the apical region and the rate of root elongation. These findings are discussed in connection with our present knowledge on the mechanisms of tooth eruption.
牙胚或正在生长的牙齿在萌出至咬合平面过程中所达到的速度，在生物学和临床上都值得关注。在这项研究中，我们收集了文献中所有与人类各种恒牙萌出运动相关的数据，包括它们在口腔中临床萌出之前和之后的数据，并重新计算为每天的移动速率。为了进行比较，我们还从文献中收集了未萌出牙齿的移动速率、骨吸收和骨沉积速率，以及正在生长的牙根的伸长速率。标准化数据（以微米/天为单位的速率）显示，牙胚和正在生长的牙齿在骨内的移动速度取决于骨吸收和骨沉积的速率，并受到其限制。临床上可见的牙冠在功能前萌出过程中的牙槽外移动速度要高得多，这可能是由根尖区域的骨沉积速率和牙根伸长速率共同作用的结果。我们结合目前对牙齿萌出机制的认识对这些发现进行了讨论。
