搜索结果: 136-150 共查到“口腔影像诊断学”相关记录189条 . 查询时间(0.421 秒)
不同投照角度X线片诊断下颌第一前磨牙多根管的临床分析
下颌第一前磨牙 多根管 X线诊断
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2010/9/8
目的探讨不同投照角度X线片在诊断下颌第一前磨牙多根管中的作用。方法选取需行根管治疗的88颗下颌第一前磨牙为研究对象。每颗患牙均拍摄术前X线正位、偏位投照片判断是否为多根管牙；K型锉探查和定位根管口，冠下法预备根管，冷侧压法充填根管，充填时记录根管形态及数量，并拍摄根管充填术后X线正位和偏位投照片，对根管进行分型。结果88颗下颌第一前磨牙中，术前X线片诊断多根管31颗，临床发现多根管30颗。术前X线...
Cone-beam CT (CB Throne®) Applied to Dentomaxillofacial Region
Cone-beam CT Anatomical depiction Clinical cases Dental implant planning Maxillofacial region
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2010/1/20
Cone-beam CT (CBCT) systems specifically designed for hard-tissue imaging of the maxillofacial region have recently become commercially available. The newly-developed CBCT system, CB Throne® (Hita...
Reliability of Linear Distance Measurement for Dental Implant Length with Standardized Periapical Radiographs
Dental implant length Radiography Measurement accuracy Mandible
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2010/1/20
The purpose of this study was to investigate the accuracy of distance measurements of implant length based on periapical radiographs compared with that of other modalities. We carried out an experimen...
Digital Subtraction Technique for Evaluation of Peri-Implant Bone Change in Digital Dental Imaging
Digital subtraction Digital dental imaging Bone change Dental implant
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2010/1/20
The purpose of this study was to investigate digital subtraction technique in digital dental imaging for implant performance, used to quantitatively evaluate bone change around dental implants. For lo...
Digital Subtraction Technique for Evaluation of Peri-Implant Bone Change in Digital Dental Imaging
Digital subtraction Digital dental imaging Bone change
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2010/12/1
The purpose of this study was to investigate digital subtraction technique in digital dental imaging for implant performance, used to quantitatively evaluate bone change around dental implants. For lo...
Identification of Unknown Body Using DNA Analysis and Dental Characteristics in Chest X-ray Photograph
Personal identification Skeletonized body DNA analysis Mitochondrial DNA Dental identification
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2010/1/21
An unknown skeletonized body was identified by DNA analysis and dental information. The body had already been cremated when a candidate for the unknown body was proposed. Therefore, for DNA analysis w...
The Effect of Bite Registration on the Reproducibility of Parallel Periapical Radiographs Obtained with Two Month Intervals
Geometric standardization Standard intraoral radiography Repro-ducibility
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2010/4/6
Statement of Problem: Digital Subtraction Radiography (DSR) needs reproducible alignment between the x-ray source, the object, and the film for obtaining identical projections of the same anatomic reg...
表达人CD40配体的重组腺病毒载体的构建
hCD40L基因 腺病毒载体 DNA同源重组 基因治疗
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2010/9/14
目的 构建含有hCD40L 基因的重组腺病毒载体,为其在动物模型体内表达和肿瘤基因治疗提供基础。方法 用Xho Ⅰ、Swa Ⅰ双酶切质粒pORF- hCD40L ,回收1 900 bp 基因片段并定向克隆插入穿梭质粒pShuttle 中Xho Ⅰ、EcoR Ⅴ双酶切位点,得到重组质粒pShuttle- hCD40L。经PmeI 酶切与腺病毒骨架质粒pAdEasy-1 共转化BJ5183 细菌,同源...
Comparison of clinical and radiographic success rates of pulpotomy in primary molars using Formocresol,Ferric Sulfate and Mineral Trioxide Aggregate (MTA)
Ferric Sulfate Mineral Trioxide Aggregate (MTA)
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2010/4/7
Statement of Problem: Pulpotomy is the most common pulp treatment of primary molars. Formocresol pulpotomy has enjoyed long-term clinical use and success, but concerns over its toxicity and mutagenici...
目的 应用功能性磁共振成像技术探讨戴软 垫紧咬运动时人脑功能活动区域定位,试图从中枢机制探讨 垫的治疗作用机理。方法 选取10 名健康成人受试者,采用时段设计,任务状态与休息状态交替。任务状态分2 组设计,实验组为戴软 垫紧咬运动,对照组为不戴软 垫紧咬运动。采用ElscintPGE 2. 0T磁共振系统成像,应用SPM99 软件进行数据后处理及组分析。结果 实验组10 名受试者在单侧或双侧的运动...
颞下颌关节MR冠状影像测量与分析
颞下颌关节 磁共振 解剖学 颞下颌关节紊乱综合征
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2010/8/25
目的 探讨颞下颌关节冠状面形态结构的关系。方法 将福尔马林液浸泡1 年以上的,能将下颌固定在牙尖交错位的15 具尸头的28 侧TMJ ,斜冠状位磁共振质子加权扫描,以下颌升支中线为基准,作相应测量。结果 ①横径由大到小排序为:关节窝内外径、髁突内外径、关节窝内径、髁突内径、髁突外径、关节窝外径。②髁突外径与关节窝外径间,髁突内径与关节窝内径间,髁突内外径和关节窝的内外径间均存在正相关关系。③变异系...
X线片质量对手工定点可重复性的影响
头影测量
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2010/9/17
X线头影测量分析是口腔正畸和正颌外科常用的技术手段1 ,其发展经历了手工定点手工测量、手工定点计算机辅助测量两个阶段。在进行X线头影测量时X线片的质量对手工定点可重复性以及有关参数的影响,国内未见报道。本研究对图像处理前后的X 线片在计算机屏幕上用鼠标定位,分析X线片处理前后对手工定点可重复性以及相关测量参数的影响,提高医生对计算机测量分析之前处理X 线片必要性的认识。