PERIODONTAL CHANGES AFTER EXPERIMENTALLY INDUCED INTRUSION OF THE UPPER INCISORS IN MACACA FUSCATA MONKEYS
PERIODONTAL CHANGES AFTER EXPERIMENTALLY INDUCED INTRUSION OF THE UPPER INCISORS IN MACACA FUSCATA MONKEYS
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DOI：
10.1016/0889-5406(89)90390-9
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发表时间：
1989-02-01
影响因子：
3
通讯作者：
TAKAHAMA, Y
中科院分区：
文献类型：
--
作者：
MURAKAMI, T;YOKOTA, S;TAKAHAMA, Y
我们正在研究牙齿垂直移动的生物学方面，这通常用于涉及牙槽组织变化的正畸治疗。在本研究中，5只幼年恒河猴的4颗上切牙被垂直侵入1.1 ~ 5.5 mm。研究了以下影响：（1）牙龈的移动，（2）牙龈沟深度的变化，（3）对牙槽组织的微观影响。结果如下。(1)牙龈移动的方向与牙齿被侵入的方向相同，但只有大约60%的距离。(2)临床冠缩短，龈沟加深。牙冠缩短和龈沟加深均约为牙齿压低的40%。(3)在实验动物或对照动物的牙龈中，显微镜下均无炎症或肿胀。(4)即使在牙齿被侵入时，上皮也始终附着在牙骨质-釉质交界处。随着牙体压入量的增加，终止于牙骨质的牙骨膜纤维（DPF）和牙龈纤维（DGF）逐渐脱离牙骨质，当牙体压入量超过5.0mm时，终止于牙骨质的纤维减少。结论：水平牙嵌压引起的龈沟加深是由于良好的口腔卫生条件下牙龈组织的积累，而不是由于龈缘周围肿胀或龈袋顶端移动。随着牙体压入的增加，DPF和DGF逐渐脱离牙骨质。
We are studying the biologic aspects of vertical movement of teeth, which are often used in orthodontic treatment involving variations in alveolar tissue. In the present study, the four upper incisors of five infant Macaca fuscata monkeys were intruded vertically from 1.1 to 5.5 mm. The following effects were examined: (1) movement of the gingiva, (2) change in the depth of the gingival sulcus, and (3) microscopic effects on the alveolar tissue. The results were as follow. (1) The gingiva moved in the same direction that the teeth were intruded, but only about 60% as far. (2) The clinical crown shortened and the gingival sulcus deepended. The shortening of the crown and the deepening of the sulcus were both approximately 40% as much as the tooth intrusion. (3) There was no inflammation or swelling microscopically in the gingiva of either the experimental animals or the controls. (4) The epithelium was always attached in the cementoenamel junction, even when the tooth was intruded. As the tooth intrusion was increased, the dentoperiosteal fiber (DPF) and the dentogingival fiber (DGF) terminating in the cementum gradually parted from it; when the tooth was intruded more than 5.0 mm, few fibers terminated in the cementum. It was concluded that the gingival sulcus deepened with horizontal tooth intrusion because of an accumulation of gingival tissue applied with good oral hygiene.sbd.not because of swelling around the gingival margin or apical movement of the gingival pocket.sbd. and the DPF and the DGF were parted from the cementum gradually as the tooth intrusion increased.