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1.
目的研究引起安氏Ⅲ类错牙合畸形的病因。方法对50例安氏Ⅲ类错牙合患者和50例正常牙合人作病因问卷调查,将结果用logistic法分析,提取有效病因。结果共有慢性扁桃体炎、遗传因素、咬上唇3项病因进入方程。结论按贡献大小,长期慢性扁桃体炎、经常咬上唇和遗传因素是导致安氏Ⅲ类错牙合畸形的危险因素。  相似文献   
2.
目的 :观察联合运用功能矫治器和方丝弓矫治器治疗安氏 类错牙合患者的临床效果。方法 :以近 5年来收治的 30例安氏 类错牙合临床患者 ,平均治疗时间 1 8个月 ,治疗前后均拍摄头影测量片 ,将测量结果进行分析比较 ,评价治疗效果。结果 :儿童的上颌磨牙远中移动 ,下颌磨牙近中移动明显 ,儿童颌骨前后垂直关系显著增加。结论 :联合功能矫治器及方丝弓矫治器治疗的安氏 类错牙合有满意的疗效 ,可以相互促进改善患者的软硬组织关系  相似文献   
3.
The human brain cortex is a highly convoluted sheet. Mapping of the cortical surface into a canonical coordinate space is an important tool for the study of the structure and function of the brain. Here, we present a technique based on least-square conformal mapping with spring energy for the mapping of the cortical surface. This method aims to reduce the metric and area distortion while maintaining the conformal map and computation efficiency. We demonstrate through numerical results that this method effectively controls metric and area distortion, and is computational efficient. This technique is particularly useful for fast visualization of the brain cortex.  相似文献   
4.
目的 比较胎儿和成人的眼神经与上颌神经的夹角 ,为婴幼儿上睑手术局部麻醉的进针提供解剖学依据。方法通过对 1 5例胎儿和 1 5例成人颅骨的眶上孔 (切迹 )、三叉神经压迹、眶下孔之间的连线的长度的测量 ,根据公式计算出眼神经与上颌神经的夹角。结果胎儿左右侧、成人左右侧的夹角分别为 33 .2± 4 .0°、34 .1± 3 .0°、32 .9± 2 .6°、32 .6± 1 .7°。结论成人左右侧无显著差异 ,胎儿左右侧无显著差异 ,成人与胎儿比较左右侧无显著差异 ,因此 ,婴幼儿眶上切迹麻醉可参照成人的操作  相似文献   
5.
目的:探讨闭角型青光眼患者凝血指标变化与临床的关系。方法:对50例闭角型青光眼患者及43例正常对照组进行了凝血指标(PT、TT、Fbg、APTT)检测。结果:闭角型青光眼患者与对照组比较PT、TT无显著变化(P<0.05),Fbg含量升高有极显著性差异(P<0.01),APTT时间缩短有极显著性差异(P<0.01)。结论:闭角型青年眼患者体内血液是高凝状态,而这种高凝状态在闭角青光眼病的发生、发展中起着重要的作用。  相似文献   
6.
We describe a case of pilocytic astrocytoma of the cerebellum mimicking an acoustic schwannoma. The tumour protruded into the porus acusticus and enlarged the internal auditory meatus, which is a quite unusual characteristic of glial tumours. Received: 2 February 1999 Accepted: 21 April 1999  相似文献   
7.
BackgroundHallux valgus orthoses are available in a wide range of designs and materials, but the effects of their design on functional performance have not been fully investigated.Research questionThis present study aims to comprehensively analyze the immediate effects of soft and semi-rigid hallux valgus orthoses on balance, plantar pressure, hallux valgus angle, and subjective sensations.MethodsSixteen female subjects have participated in the study, including 10 subjects with healthy feet and 6 with hallux valgus. Three conditions are tested, including in the barefoot and using two types of commercially available hallux valgus orthoses. The subjects participate in static and dynamic (walking) tests with the use of the Novel Pedar® system. The peak pressure values in the hallux, lateral toes, first metatarsophalangeal joint, 2-4th metatarsal heads, 5th metatarsal head, medial midfoot, lateral midfoot and rearfoot in the various foot conditions are examined and compared. The hallux valgus angle of each subject is measured based on their footprint. Their subjective feelings towards the orthoses are also evaluated. A repeated-measures analysis of variance, and independent-sample t-test are performed.ResultsThe correction of the hallux valgus angle is statistically significant when the subjects with hallux valgus use the orthoses. In comparing the two types of orthoses, the use of the orthosis made of soft materials results in correction in the hallux valgus angle and higher wear comfort, and lower plantar pressure in hallux area.SignificanceThe results provide insights into the design of hallux valgus orthoses, thus offering practical reference for the selection of hallux valgus orthosis with compromise between functional performance and wear comfort.  相似文献   
8.
??Objective??To measure and compare the discrepancy of Collum angle of incisors among different types of Angle malocclusion using CBCT??and to provide guidance for the prevention of alveolar bone fenestration and dehiscence in anterior region. Methods??The cases of malocclusion were chosen in the Xi'an Jiao Tong University Hospital of Stomatology from 2014 to 2016??and four types of malocclusion were obtained class ??30 cases????class ??1 ??29 cases????class ??2??27 cases????class ??30 cases????according to the clinical occlusion. Sagittal sections of right upper and lower incisors were obtained by three-dimensional CBCT images using Invivo 5 software?? and Auto CAD 2007 software was used to measure the angle formed by the long axis of crown and root??Collum angle????and then analyzing the differences among groups were analyzed by single factor variance and compared by Scheffe method. Results??There were significant differences in the size of Collum angle among different types of malocclusion??P??0.05??. The Collum angle of upper incisor in class ??2 was ??7.02 ± 1.83??°??which was significantly larger than that of other groups. The Collum angle of lower incisor in Class ??1 was??-2.25 ± 4.76??°??which meaned that the crown could be lip side compared to the root??and there was significant difference compared with the other groups. The Collum angle of the lower incisor in class ?? was??8.15 ± 2.50??°??which was also significantly larger than other groups. Conclusion??There are significant differences in the Collum angle of the upper and lower incisors among different types of malocclusion. The crown of upper incisor in Class ?? 2 and lower incisor in Class ?? can be lingual side to the root??and the crown of lower incisor in Class II1 can be lip side compared to the root??which should be taken into consideration when the incisor is pulled backward or inclined to lip to avoid the root cutting through bone cortex.  相似文献   
9.
目的针对目前医院病床基本无配备床头抬高角度测量工具的现状,调查护士目测法评估床头抬高角度的测量误差,探讨使用精确测量工具的必要性。方法随机选择我院各护理单元主管护师、护师和护士各2名,共96名。采用目测法评估床头抬高15°、30°、45°三种角度,与角度尺精确测量法比较床头抬高角度的差异。结果目测评估床头抬高15°、30°、45°所产生的实际角度分别为(10.56±3.67)°、(19.54±6.58)°、(38.18±9.69)°,测量误差发生率96.2%,其中实际测量角度小于目标角度,占93.8%,实际测量角度大于目标角度,占2.4%,与角度尺测量方法比较,差异有统计学意义(P〈0.01)。结论目测法评估会影响有特殊卧位要求患者的治疗效果,并发症发生几率增加,应使用精确的测量工具。  相似文献   
10.
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