应用"摇椅形"弓丝矫治前牙开牙合的临床研究

目的　研究“摇椅形”弓丝对前牙开牙合畸形的矫治效果。方法　对 14例前牙开牙合的患者应用“摇椅形”弓丝同时配合前牙区垂直牵引进行矫治 ,通过分析矫治前后X线头颅定位侧位片 ,评价其矫治效果。结果　矫治后上下颌切牙伸长、内收 ,下颌磨牙直立 ,牙合平面改建 ;同时控制了开牙合患者垂直方向的生长。结论　应用“摇椅形”弓丝同时配合前牙区垂直牵引矫治开牙合畸形符合利用固定矫治器治疗开牙合的机理 ,能获得良好的矫治效果。     

Metal ion release from new and recycled stainless steel brackets

As orthodontic appliances can corrode with time in the oral environment, the aim of this study was to compare the release of metal ions from new and recycled brackets immersed in buffers of different pH values over a 48 week period. To simulate commercial recycling, the stainless steel brackets were divided into two groups: new and recycled. The bases of the latter were coated with adhesive and the brackets were heat treated before being immersed in the test solution for 48 weeks. The release of nickel, chromium, iron, copper, cobalt and manganese ions was analysed by atomic absorption spectrophotometry. Differences were compared using one-way analysis of variance. The results showed that recycled brackets released more ions than new brackets (P < 0.05). Brackets immersed in solutions of pH 4 released more ions than those immersed in solutions of pH 7, and the total amount of ions released increased with time over the 48 week period (P < 0.05). This study demonstrates that both new and recycled brackets will corrode in the oral environment. To avoid clinical side-effects, metal brackets should be made more resistant to corrosion, and recycled brackets should not be used.     

钟状晚期牙胚和牙及牙周组织的特殊染色应用探讨

目的:探讨钟状晚期牙胚和成熟牙及牙周组织的特殊染色应用.方法:钟状晚期的人牙胚和成年大鼠的牙及牙周组织石蜡切片,用改良的Gomori和Mallory染色法染色,镜检染色结果.结果:改良Gomori染色,可将钟状晚期牙胚中的釉质基质与牙本质基质、牙及牙周组织中的硬组织与软组织、骨与软骨、染成2 种不同的颜色,便于识别和区分.各种组织结构和细胞形态清晰.结论:牙发育和牙及牙周组织教学科研切片,用改良的Gomori染色,利于观察研究,取得满意结果.     

颞下颌关节外科

颞下颌关节 (temporomandibularjoint,TMJ)外科广义讲包括所有需要应用外科手段治疗的TMJ疾病以及关节周围疾病。解剖学、病理形态学、生物化学、免疫学、影像诊断学、生物力学以及医学工程学等方面的进步都为TMJ外科的发展奠定了基础 ,新知识、新理论和新手术方法改变了TMJ外科的面貌和方向。 2 0世纪 70年代以前主要涉及处理TMJ结构 ,解决关节强直 ,80年代以后逐步转向关节镜外科 ,90年代至今关节镜应用的范围在扩大 ,关节重建的方法已更新 ,人工关节的设计、制作和临床使用的报道也在增多。一、TMJ外科的内容1.TMJ损伤 :包括关…     

CAD/CAM全瓷高嵌体修复磨牙大面积牙体缺损的临床疗效评价

目的探讨CEREC 3D椅旁计算机辅助设计和制作(computer-aided design/computer-aided manufacture,CAD/CAM)系统制作全瓷高嵌体修复后牙牙体缺损的临床效果。方法对50例后牙牙体缺损患者,使用CEREC 3D椅旁CAD/CAM系统制作全瓷高嵌体,术后即刻和修复后6个月采用改良美国牙科协会评价标准对修复体进行评价,对患者进行满意度调查。结果修复后即刻检查边缘密合度、解剖外形、表面光滑度、色彩匹配度、牙龈健康和固位等6个方面达到满意比率分别为96%、98%、98%、94%、94%和100%,6个月后满意比率分别达到96%、98%、98%、94%、98%和100%。修复后6个月患者对全瓷高嵌体修复在形态、色彩和舒适性方面的满意度分别为88%、90%和92%。结论CEREC 3D椅旁CAD/CAM系统制作全瓷高嵌体修复后牙牙体缺损取得了较满意的初期临床效果,但是长期临床应用尚需进一步研究。     

肺梭形细胞癌1例报告及文献复习

探讨肺梭形细胞癌（SpCC）患者的临床特征、诊断过程和治疗方法,旨在提高临床医生对该病的认识。     

Acupuncture Anesthesia for Radiofrequency Catheter Ablation in Treatment of Persistent Atrial Fibrillation: A Case Report

Atrial fibrillation(AF)is a clinically common arrhythmia,which is prone to cerebral infarction and heart failure.Radiofrequency catheter ablation(RFCA)is currently considered the standard first-line treatment.During RFCA,cells are dehydrated and necrotized through heat,thereby achieving pulmonary electrical isolation;patients may experience pain and discomfort in the process.     

Cupping Therapy for Diseases: An Overview of Scientific Evidence from 2009 to 2019

Cupping therapy has been accepted worldwide, and many studies have been conducted to reveal its curative effects and mechanisms. To comprehensively evaluate the effect of cupping therapy, database including China Network Knowledge Infrastructure (CNKI), Chinese Scientific Journal Database VIP, Wan Fang Database, Chinese Biomedicine (CBM), PubMed and Web of Science were searched from 2009–2019. We summarized all the meta-analyses, randomized controlled trials, clinical trials and the mechanisms studies of cupping therapy in the previous 10 years, hoping to provide a reference for the clinical applications and studies.