Morphological and clinical considerations of first and second permanent molar eruption disorders
Morphological and clinical considerations of first and second permanent molar eruption disorders
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DOI：
10.1016/j.aanat.2006.02.003
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发表时间：
2006-07-01
影响因子：
2.2
通讯作者：
Gedrange, Tomas
中科院分区：
文献类型：
--
作者：
Proff, Peter;Bayerlein, Thomas;Gedrange, Tomas
牙齿萌出是一个复杂的生物学过程，从颌骨的发育部位开始，直到牙齿在咀嚼平面上达到其最终功能位置。各种因素可能会干扰这一过程。除了萌出路径上的机械障碍、牙胚的病理位置或轴向定向、牙齿的形态畸变或牙周组织的病理改变、萌出机制的原发性疾病外，这些形态特征都可能导致牙齿完全或部分保留在颌骨中，这些形态特征影响正畸矫正的预后，而正畸矫正的预后取决于潜在的原因。第一和第二磨牙很少受到萌出障碍的影响，患病率为0.01%至0.08%，然而，可能会导致明显的功能后果，如后牙开咬或拮抗物伸长。在概述了牙齿萌出障碍的发病因素后，选择了第一和第二恒磨牙阻生的病例，介绍了其形态学原因。(c)2006年Elsevier GmbH。All rights reserved.
Tooth eruption is a complex biotogical process which starts from the site of development in the jaw bone until the teeth reach their final functional position in the chewing plane. Various factors can disturb this process. Besides mechanical obstacles on the eruption path, a pathological position or axial orientation of the tooth germ, morphological aberrations of the tooth or pathological alterations of the periodontium, primary disorders of the eruption mechanism may lead to complete-or partial retention of the tooth in the jaw bone.These morphological features bear upon the prognosis of orthodontic correction which is dependent upon the underlying cause. First and second molars are rarely affected by eruption disorders, with a prevalence of 0.01 to 0.08 per cent, however, marked consequences for function such as posterior open bite or elongation of the antagonists may result. Following an overview of pathogenetic factors of tooth eruption disorders, selected cases of impacted first and second permanent molars are presented with respect to their morphological causes. (c) 2006 Elsevier GmbH. All rights reserved.