畸

The sample comprised 25 patients with the first premolar removed during orthodontic treatment. Digital models and lateral cephalometric records were taken pre- and post- treatment. We chose two kinds of regional superimposition methods on the digital models (One was the mesial zone of the third primary ruga and regional palatal vault, the other was the palate) and Baumrind's best-fit for cephalometric superimposition. The amounts of incisor and molar movement were measured and a comparative study was performed.

三。选择25例拔除上颌第一双尖牙正畸患者治疗前、后的上颌模型进行三维重建，分别使用第三腭皱近心端局部腭穹隆和腭部对同一患者治疗前、后的数字化模型进行局域重叠，以治疗前后头颅侧位片的 best-fit重叠为评价标准，比较三种方法之间的差异，对应用三维数字化牙颌模型纵向重叠评价正畸治疗前、后的牙齿移动进行探索性研究。

Results: Malignant transformation of MCT amounted to 1.4% of all MCT. Of the 11 cases, 7(7/11) were squamous cell carcinoma, 3(3/11) adenocarcinoma, and 1 (1/11) malignant struma ovarii.

结果：卵巢成熟囊性畸胎瘤恶变占良性畸胎瘤的1.4％，其中鳞癌变7例（7／11），腺癌变3例（3／11），卵巢甲状腺肿恶变1例（1／11）。5年平均生存率80％，Ⅰ期为100％，Ⅱ～Ⅲ期为0。

Objective We provided the reference for diagnoses in Othodontics of total dental space analysis. Method This study randomly collected 140 Chinese students(60 male, 80 female) who were from eithteen to twenty five years old with third molars completely erupted.

正畸诊断和治疗应考虑全牙齿及其周围环境的影响，解除牙列中各个区域的牙量骨量不调，但目前国内正畸医师在错畸形的诊断、治疗中，比较注重牙弓前、中段的牙量骨量分析，却忽略了牙弓后段的分析[1] 。

The three-dimensional classifiable method of orthodontics and the database of similar cases are made,which provide a new idea to manage diagnostic class of orthodontics.

新型正畸三维分类法及相似病例库的建立，为利用计算机实现正畸诊断分类管理提供了新思路。

The aim of the current study was to examine the effect of the orthodontic extrusion movements on the periodontal parameters during a 6-month period of clinical observation and to find out whether orthodontic tooth extrusion makes the gingival margin move in a coronally direction.

的目的，目前的研究是研究的影响正畸挤压运动的牙周参数在6个月期间的临床观察和了解自己是否正畸牙齿挤压使牙龈缘朝冠方向。

Interceptive orthodontic can eliminate or reduce the severity of a developing malocclusion, the complexity of orthodontic treatment, overall treatment time and cost.

阻断正畸可以消除或减少严重的一个发展中国家错，复杂的正畸治疗，总治疗时间和成本。

Results: Immunohistochemical staining revealed that expression of RANKL protein was detected in periodontal ligament cells and osteoclasts which mostly located in resorption lacunae.

结果：正畸牙移动压力侧组化结果显示，RANKL阳性表达位于牙周膜细胞和位于骨陷窝内的破骨细胞中，在正畸牙移动第3、5和7天时呈强阳性表达。

The postoperative pathology confirmed that cortical carcinoma was found in 5 cases and pheochromocytoma in 20 cases, malignant pheochromocytoma in 4 cases, malignant fibrous histiocytoma in 1 case, neurocytoma in 1 case, myelolipoma in 1 case, dysembryoma in 1 case, dysembryo-sarcoma in 1 case, well-differentiated liposarcoma in 1 case respectively.

术后病理提示皮质癌5例；嗜铬细胞瘤20例；恶性pheo 4例；恶性纤维组织细胞瘤1例；节神经细胞瘤1例；髓样脂肪瘤1例；畸胎瘤1例；畸胎肉瘤1例；高分化脂肪肉瘤1例。

PURPOSE: To Introduce a combined orthodontic and orthognathic method for treatment of skeletal class Ⅱ division 1 malocclusion in adults.

目的 采用正畸－正颌手术联合治疗骨性安氏Ⅱ类Ⅰ分类错患者，介绍手术前后正畸及术前的准备工作。

Results At the dosage of 25 mg/kg,AN could induce higher incidence of fetal resorption and death,and decrease the average fetal body weight and le ngth with significant difference(P＜0.05)when compared with neg ative controls.At the dosage of 35 mg/kg,AN could decrease average vital fet us p er litter with significant difference(P＜0.05),and induce chang es of other indexes with highly significant difference(P＜0.0 1).At the dosage of 25 and 35 mg/kg,AN could induce higher teras rate,maternal t eras rate and malformation rate of vital fetus with significant and/or highly s ignificant difference(P＜0.05 or P＜0.01),resp ectively.There existed a dose-effect or dose-response relationship between abo ve indexes and doses.

结果 25 mg·kg-1组死胎率、吸收胎率升高，胎鼠平均体重、体长、尾长减小，与阴性对照组比较差异有显著性(P＜0.05)；35 mg·kg-1组除窝平均活胎数减少，差异有显著性( P＜0.05)，其余各指标与阴性对照组比较差异有非常显著性(P ＜0.01)；25，35 mg·kg-1组畸胎率、母体畸胎率、活胎畸形率升高，与对照组相比差异有显著性和/或非常显著性(P＜0.05或P ＜0.01)，且有明确的剂量效应或剂量反应关系。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。