畸

Objective To evaluate the effect of fluoried protector on preventing enamel demineralization and promote enamel remineralization during orthodontic treatment, so as to provide evidence for the application of DIAGNOdent in clinic.

目的 评价氟漆在正畸治疗中防止牙釉质脱矿及促进牙釉质再矿化的效果，并为激光荧光诊断仪的临床应用提供依据。

Results: 4 cases were geminoma, 3 cases were teratoma, 1 case was choriocarcinoma, 4 cases were glioma, 2 cases were meningiomas, pineoblstoma, neuroblastoma, dermoid cyst and arachnoid cyst each had one case. It maybe very difficult if we diagnosed only through MR signals. Due to the multitude origin of histology, we can diagnose through some special signals, such as adipose, cystic degeneration, hemorrhage and implant dissemination. We can also combined with clinical examination which is help to differential diagnosis.

结果：生殖细胞瘤4例，畸胎瘤3例，1例绒毛膜癌，胶质瘤4例，脑膜瘤2例，松果体母细胞瘤、神经母细胞瘤、皮样囊肿及蛛网膜囊肿各1例，仅通过MR信号较难诊断，由于肿瘤组织学来源多，可通过一些特殊信号如脂肪、囊变、出血、种植播散等，并结合临床检查来进行鉴别诊断。

There were 36 males and 40 females,with the average age of 47.7 years.36 patients presented with sciatica and perineal numbness,11 patients had painless mass and the other 20 were identified due to other causes.Among 67 benign neurogenic tumors,54 were originated from S1-S3 nerves,3 from S4-S5 nerves and 11 from the presacral space without caudal involvement.Giant cell tumor was found in 60 patients,which included 24 males and 36 females,with an average age of 32 years.Upper sacrum（S1-S2） was involved firstly.There were 56 patients（average,37.7 years） diagnosed as other primary benign bone tumors,which included 24 cases of teratomas,epidermoid cyst or dermoid cyst.Other malignant tumors,including chondrosarcoma （17）,Ewing′s sarcoma/PNET（14）,multiple myeloma（12）,lymphoma（6） and osteosarcoma（6） were found in 64 patients.

其中脊索瘤95例，男62例，女33例，平均年龄55.7岁，骶尾区疼痛是主要症状（82例），半数以上患者伴有坐骨神经痛，肿瘤多先累及低位骶骨（S3~S5）；神经源性肿瘤76例，男36例，女40例，平均年龄47.7岁，神经纤维瘤43例，神经鞘瘤24例，恶性神经鞘瘤9例，主诉多为坐骨神经痛、会阴部麻木（36例）和无痛性包块（11例），20例患者为查体或其他原因检查时发现，67例骶骨良性神经源性肿瘤起源于S3以上神经者54例，起源于S3以下神经者3例，发生于骶前未累及骶管者10例；骨巨细胞瘤60例，男24例，女36例，平均年龄32岁，腰骶尾部不适（37例）、坐骨神经痛（21例）是主要的临床表现，肿瘤多先累及上位骶骨（S1~S2）；骶骨其他原发良性肿瘤及瘤样病变56例，包括畸胎瘤、皮样囊肿、表皮样囊肿共24例；其他原发恶性肿瘤64例，包括软骨肉瘤17例，尤文肉瘤14例，多发性骨髓瘤12例，成骨肉瘤6例等。

Methods Used the dental desensitizer (Gluma, Single Bond 2, Bisblock) individually on the prepared human bicuspid teeth which were extracted for orthopaedics. Observed the microscopic characteristic of the dentinal surface and cross section with SEM.

常规牙体预备离体正畸牙，涂用脱敏剂（Gluma、Single Bond 2、Bisblock），用扫描电镜观察牙本质表面和剖面的微观特征，与对照组比较。

This way is effective and feasible in regain artistic of diastem of anterior teeth extraction of adult orthodontic.

该方法对成人正畸时前牙区拔牙间隙的临时性修复不失为一种有效而可行的方法。

Objective To explore how to regain artistic of diastem of anterior teeth extraction of adult orthodontic .

该方法对成人正畸时前牙区拔牙间隙的临时性修复不失为一种有效而可行的方法。

For this American novelist Sherwood Andersons representative work, there have been divergency wherever in China or his native country. In this thesis, I will focus on the text to analyze its modernist art.

全文以现代叙述学"故事"和"话语"的二分法作为框架，分别从"性主题"和"话语"形式的分析入手，从文化、作者、美学等方面对《小城畸人》的现代主义艺术进行多角度观照。

Under appropriate conditions, EG cells formed embryoid bodies in suspension culture and multiple types of differentiated cells in monolayer culture.

EG细胞在裸鼠体内形成畸胎瘤，包含来自三个胚层的分化细胞。

Ma and his team of specialists (periodontist, endodontist, oral surgeon, orthodontist) will gather to discuss and devise the proper treatment plan and choose from a variety of procedures to deliver the best and most beautiful results for you.

之后，根据检查数据和结果，马博士和他的专家组(牙周专家，牙髓专家，口腔外科专家，正畸专家)将讨论和制订出最适合您的牙科美容治疗方案，打造您最美丽的笑容。

This study was designed to show whether extrusive orthodontic movements have negative effects on the gingival tissues, and to detect the relationship between tooth extrusion and the width of the keratinized gingiva.

这项研究的目的是要表明是否喷出正畸运动产生不利影响的牙龈组织，并检测之间的关系牙齿挤压和宽度的角化牙龈。

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。