直丝弓矫治器结合小平导矫治前牙深覆He

目的：总结直丝弓矫治器结合小平导矫治前牙深覆He的临床效果。方法：选择安氏Ⅱ类错He30例，男12例，女18例，年龄11—14岁。均采用直丝弓固定矫治器，结合上颌小平导打开咬合。矫治前拍摄头颅定位侧位片，待咬合打开，后牙有接触时拍阶段头颅定位侧位片。选择头影测量指标22项，对测量结果进行t检验。结果：MP-SN、PP-MP、S-Ar-Go三项指标在戴小平导前后均有显著性差异，说明下颌平面角增大，并且主要是下颌骨后旋的结果。S-Go、N-Me、ANS-Me在戴用后也有显著增大。这均有利于改善低角病例的面形。L1-MP(mm)、Overbite(mm)戴小平导后显著减小，而U6-PP(mm)、L6-MP(mm)显著增大，说明下前牙明显压低，上下后牙明显升高。结论：直丝弓矫治器结合上颌小平导矫治前牙深覆He是一种快速有效解除前牙深覆He的方法。     

下颌尖牙高[牙合]型[牙合]板配合直丝弓矫治器治疗前牙深覆[牙合]深覆盖临床观察

目的：总结下颌尖牙高[牙合]型[牙合]板配合直丝弓矫治器治疗前牙深覆[牙合]深覆盖的临床疗效。方法：选择Angle Ⅰ类错[牙合]上颌前牙有散在间隙伴深覆[牙合]深覆盖病例15例,男7例,女8例。年龄18～22岁。均采用国产直丝弓托槽,先行上颌牙固定矫治。同时下颌配戴尖牙高[牙合]型[牙合]板打开咬合,矫治前拍摄头颅侧位定位片,待咬合打开,后牙有接触时再拍摄头颅侧位定位片,选择头影测量指标22项,对测量结果进行T检验。结果：MP—SN,S-Ar—Go,Y—axis在戴尖牙高[牙合]型[牙合]板治疗前后均有显著性差异,N—Me,ANS—Me也有显著性差异,下颌平面角增大,下颌有后旋趋势,有利于改善低角型面形。U6-PP,L6-PP增大,有显著性差异,上下后牙均有升高,有利于打开咬合,解除深覆[牙合]。U1-PP增大有显著性差异,提示上前牙伸长,L1-Mp有减小的趋势,没有显著性差异,下前牙有压低的可能。U1-SN,UI—NA,U1-PP有非常显著差异,上颌前牙明显内收,深覆盖明显改善。结论：下颌尖牙高[牙合]型[牙合]板配合直丝弓矫治器是-种治疗前牙深覆[牙合]深覆盖的有效方法。     

应用多曲方丝弓技术打开咬合20例临床观察

目的 :通过对深覆牙合患者采用多曲方丝弓 (MEAW )技术矫治 ,探讨MEAW打开咬合的临床效果。方法 :前牙深覆牙合Ⅱ° -Ⅲ°错牙合患者 2 0例 ,平均年龄 16.5岁 ,弯制多曲方丝弓矫治深覆牙合。治疗前后拍摄X线头颅侧位定位片 ,并进行X线头影测量分析。结果 :U 1A -PP平均减小了 1.70mm ,L1A -MP平均减小了 1.60mm ,U6-PP平均增加了 1.5 2mm ,L6-MP平均增加了 1.5 1mm ,说明咬合打开的机制是前牙压低 ,后牙升高。结论 :应用MEAW技术 ,能压低前牙 ,升高后牙 ,是一种快速、有效打开咬合的好方法。     

平面导板辅助方丝弓矫治器打开咬合的临床体会

在方丝弓矫治技术中，对于深覆牙合患者，打开咬合是至关重要的一步，通常临床中应用各种矫治弓丝上的弯曲或辅助弓丝打开咬合，但有时疗程较长且辅助弓丝易刺激软组织。笔者在临床工作中，利用上颌平面导板辅助方丝弓矫治器，打开前牙咬合，收到较满意的效果，报告如下。...     

Begg技术原理应用于直丝弓矫治器打开前牙咬合阶段的疗效评价

目的 评价Begg技术原理应用于直丝弓矫治器上用于打开前牙咬合,改善覆盖的疗效。方法 30例安氏Ⅱ类1分类错牙合患者在治疗前,第2期打开咬合后拍摄头颅侧位片,并对牙、齿槽、颌间的测量结果配对t检验。结果 前牙覆盖明显减小,其中上切牙显著舌向移动。上中切牙角明显减小,上下中切牙角显著增大。前牙覆牙合平均减小了3.68 mm,上下磨牙被伸长,而上下切牙被压低,下磨牙出现了明显的近中移动。结论 在直丝弓矫治器中应用Begg技术原理可以较快速、有效打开前牙咬合,改善前牙覆盖。     

方丝弓技术结合小导板矫治深覆(牙合)

前牙深覆牙合是牙牙合畸形中较常见的上下颌牙弓垂直向距离关系异常,矫治的成功与否,在很大程度上取决于咬合打开的效果.本文采用上颌前牙小导板结合方丝弓固定矫治器矫治前牙深覆牙合收到满意的临床效果.     

压低辅弓有效改正成人前牙深覆(牙合)的正畸治疗

目的 探讨自制压低辅弓对成人前牙深覆(牙合)的临床疗效及其作用机制。方法选择16例前牙深覆(牙合)的成年患者,采用直丝固定矫治器结合自制压低辅弓打开其咬合,通过X线头影测量分析患者矫治前、后前牙深覆(牙合)的变化,再结合治疗前后的临床检查和X线检查评价治疗效果。结果患者治疗后上前牙垂直向平均压入2mm,矢状向无明显唇倾...     

单侧后牙正锁[牙合]正畸矫治的临床研究

目的：评价单侧后牙正锁[牙合]的矫治效果,进一步探讨单侧后牙正锁[牙合]的矫治方法。方法：单侧后牙正锁[牙合]患者11例（男4例,女7例）,年龄13-26岁,采用直丝弓矫治技术矫治,治疗中上颌使用前牙平面导板和健侧后牙[牙合]垫,患侧上下颌后牙交互牵引。治疗前后常规拍摄头颅定位侧位片,并进行X线头影测量分析。结果：治疗结束后,后牙正锁[牙合]得到了矫治,牙弓形态正常,前牙覆[牙合]超[牙合]正常,后牙咬合关系良好,面下1/3高度增加。结论：直丝弓矫治器配合适当的后牙交互牵引能够有效的矫治单侧后牙正锁[牙合]。     

直丝弓技术矫治安氏Ⅱ类错(牙合)临床应用6例

目的观察直丝弓技术矫治安氏Ⅱ类错牙合的临床效果。方法选择6例安氏Ⅱ类错牙合患儿,前牙深覆盖,伴上、下牙列拥挤,拔除后采用直丝弓矫治器进行矫治。结果矫治后是前牙突度轴倾度得到明显改善,前牙覆牙合覆盖正常,上、下牙齿排齐,咬合关系恢复正常。结论直丝弓矫治技术托槽设计简单,舒适,可简化矫治程序。     

安氏Ⅱ类2分类青少年不拔牙矫治前后的硬组织变化

目的评价安氏Ⅱ类2分类青少年不拔牙矫治前后硬组织的变化。方法15例安氏Ⅱ类2分类青少年病例，使用直丝弓矫治技术配合上颌平面导板完成不拔牙矫治。对所有病例治疗前后头颅定位侧位片进行描图和手工测量，比较治疗前后硬组织的改变。结果上前牙舌倾得以纠正，Spee曲线整平，前牙覆[牙合]达到正常，SNB角增大，下前牙压低，下后牙升高，下颌骨长度增加。结论安氏Ⅱ类2分类青少年病例，在上颌前牙舌倾纠正后，下颌骨有一定程度的生长，使上下颌骨矢状向的位置关系得以改善。配合使用平导打开咬合，可以有效地纠正前牙深覆[牙合]，整平Spee曲线，取得良好的治疗效果。     

Inflammation associated with implants with different surface types

OBJECTIVES: The aim of this study was to determine the nature of the inflammatory infiltrate associated with different transmucosal implant surfaces in dogs. METHODS: Three experimental and one control single-stage implants were randomly placed on each side of the jaw in eight dogs. The transmucosal portion of the test implants consisted of an acid-etched surface (type A), a machined surface with a circumferential groove (type C) and a surface prepared by mild anodic oxidation (type D). The control was a standard machined surface (type B). In order to determine the response to the different surfaces, plaque control was carried out twice weekly following placement of the implants for the entire period of the experiment. At 6 months, gingival biopsies and plaque samples were obtained. The area of inflammatory infiltrate and the nature of the infiltrating cell types were determined using immunohistology. Real-time polymerase chain reaction was used to identify putative periodontal pathogens. RESULTS: Inflammatory infiltrates were associated with all implant surfaces and were commonly found subepithelially and perivascularly. T cells were the predominant infiltrating cell type in all lesions, associated with the different surfaces. In all lesions the CD4 : CD8 ratio was approximately 2 : 1. Statistical analysis showed that the type C surface (machined surface with a groove) had significantly larger inflammatory infiltrates than the type B surface (machined surface without a groove; P<0.05). No statistically significant differences were found with respect to the size of the inflammatory infiltrates or in terms of the nature of infiltrating cells. However, despite the intensive plaque control regime, plaque was present on all implant surfaces at the time of biopsy 6 months after placement. All implants had similar numbers of Tannerella forsythia, Fusobacterium nucleatum and Porphyromonas gingivalis. Actinobacillus actinomycetemcomitans, was not detected in any sample. CONCLUSIONS: These results suggest that the development of inflammation associated with implants is independent of surface type, but is nevertheless associated with the presence of plaque. The different surfaces had no influence on the nature of the infiltrate, with T cells being the predominant cell type in all lesions. Finally, the different implant surface types seemed not to influence the peri-implant microbiota. However, the presence of the circumferential groove tended to be associated with larger infiltrates. Whether this is due to increased plaque accumulation remains to be determined.     

Clinical experiences with patients with facial bone deformities associated with hemifacial microsomia.

Eighteen adult patients with hemifacial microsomia were treated with a combination of skeletal and augmentation surgery. Three typical cases are presented. In principle, skeletal and augmentation surgery have recently been performed in combination in a single stage. Groin flaps and scapular or scapular ostocutaneous flaps have mainly been employed for augmentation surgery.     

Vasovagal syncope with asystole associated with intravenous access

Two cases of vasovagal syncope (VVS) during venous access are reported. Both patients had a history of fainting episodes and experienced bradycardia with asystole, hypotension, and fainting. Pain and phobic stress during venous access triggered an increase in parasympathetic tone, resulting in bradycardia with asystole and hypotension in both cases. Hypotension and bradycardia likely caused cerebral hypoperfusion, leading to fainting. The intense parasympathetic tone triggered by somatic or emotional stress was likely responsible for directly depressing the sinus node, leading to asystole and bradycardia. Bradycardia with asystole progressing to syncope is a potentially fatal dysrhythmia in patients with cardiovascular disease or older patients with decreased cardiac function. Appropriate treatment for VVS includes the administration of intravenous fluids, vagolytics, ephedrine, and the rapid use of the Trendelenburg position. Intravenous fluids and atropine were used to treat the present patients.     

Oral tuberculosis associated with a treatment with anti-rheumatic drugs

BACKGROUND: The use of immunosuppressive medication is a dominant risk factor for infection in patients with rheumatoid arthritis (RA). Methotrexate (MTX) is one of the traditional disease-modifying antirheumatic drugs. Adalimumab [a human anti-tumor necrosis factor-alpha (anti-TNF-alpha) monoclonal antibody] represent an important advance in the treatment of RA and has been recently come in use. TNF-alpha plays a role in the host defense against Mycobacterium tuberculosis and notably in granuloma formation. Infections occur at a high rate among those who use one or the combination of the two medications. METHOD: We examined a female patient that was referred to our department for evaluation and treatment of a granular lesion on the soft palate and uvula, complaining of mild dysphagia. The patient was treated for 4 months with MTX and adalimumab for RA before the oral lesion appeared. RESULTS: The histopathological examination of a specimen of the oral lesion, taken by biopsy, showed a chronic inflammation characterized by tuberculous granulomas. Polymerase chain reaction test and culture of a new specimen was positive for M. tuberculosis. CONCLUSIONS: The therapeutic use of MTX or/and adalimumab for the treatment of RA or few others diseases, can cause oral tuberculosis.     

Recurrent intraoral pyogenic granuloma with satellitosis treated with corticosteroids

The development of recurrent pyogenic granulomas as multiple satellite lesions has not been reported in the oral cavity. This report describes an unusual case of intraoral pyogenic granuloma recurring multiple times after surgical excisions with the formation of satellite lesions. Due to failure of surgical management, an alternative approach was taken. We illustrate how the lesions were successfully treated with a series of intralesional corticosteroid injections.     

Evaluation of relapse with thermoplastic retainers equipped with microsensors

ObjectivesTo examine relapse with thermoplastic retainers equipped with microsensors 1 year after treatment.Materials and MethodsA total of 42 patients (29 females, 13 males) treated with four premolar extractions were included in this study. Thermoplastic appliances equipped with TheraMon microsensors (Handelsagentur Gschladt, Hargelsberg, Austria) were used to assess daily wear time (DWT), and the patients were monitored at 2-month intervals for a period of 12 months. At the end of the follow-up, the following two groups were formed based on the mean DWT: short wear time (SWT; <9 h/d) and long wear time (LWT; ≥9 h/d). Digital models were constructed before treatment (T0), at debonding (T1), and 6 months (T2) and 12 months (T3) after debonding. Little''s Irregularity Index (LII) and the intercanine and intermolar widths, arch lengths, overjet, and overbite were calculated based on the digital models. Data were analyzed statistically.ResultsIrregularity and overjet increased, whereas transverse measurements and arch lengths decreased with time in both groups. During the retention period, overbite decreased in the SWT group but increased in the LWT group. There were significant differences between groups only in mandibular irregularity. The LII values of the SWT group were significantly higher than those of the LWT group for the T1–T2 and T1–T3 time intervals (P < .05).ConclusionsA mean DWT less than 9 hours/day was inadequate for controlling irregularity within clinically acceptable limits. A wear time of at least 9 h/d is recommended for the maintenance of mandibular anterior alignment.