The lateral leeway in the habitual intercuspation: experimental studies and literature review

The habitual intercuspation is used ubiquitous for manufacturing small dental restorations. However, a little is known on its precision. The aim of the present study was therefore to investigate the unambiguity and accuracy of the habitual occlusion in mounted plaster casts from fully dentate persons. Eighty-one fully dentate volunteers, 36 women and 45 men aged 26.8 +/- 6.2 years (18-55 years), with minor fillings and no signs or symptoms of TMD took part in the experiments. Silicone impressions were taken, poured with stone plaster and the obtained casts mounted into Dentatus ARL(R)- articulators using an individual face bow transfer. Subsequently, the models were transferred to a custom-made measuring articulator where the lateral leeway and the accuracy of the hand-held habitual intercuspation were quantified in the condylar area. Measurements were repeated seven times with the upper cast pushed either to the maximum right or the maximum left intercuspation. The hand-held habitual intercuspation of upper and lower cast proved ambiguous in 57% of pairs of casts. The average lateral leeway of the habitual intercuspation in the condylar area was 0.10 +/- 0.05 mm (0-0.51 mm; median 0.07 mm) between the maximum right and left occlusal positions. The average accuracy of three repeated measurements was 0.22 +/- 0.09 mm (0.02-1.17 mm; median 0.16 mm). Natural occlusal surfaces in a full dentition do not guarantee an unambiguous habitual intercuspation of the plaster casts. The described leeway and technical limits might be possible causes for occlusal adjustments that are sometimes necessary when inserting restorations manufactured in habitual intercuspation.     

3D digital breast cancer models with multimodal fusion algorithms

Breast cancer image fusion consists of registering and visualizing different sets of a patient synchronized torso and radiological images into a 3D model. Breast spatial interpretation and visualization by the treating physician can be augmented with a patient-specific digital breast model that integrates radiological images. But the absence of a ground truth for a good correlation between surface and radiological information has impaired the development of potential clinical applications.A new image acquisition protocol was designed to acquire breast Magnetic Resonance Imaging (MRI) and 3D surface scan data with surface markers on the patient’s breasts and torso. A patient-specific digital breast model integrating the real breast torso and the tumor location was created and validated with a MRI/3D surface scan fusion algorithm in 16 breast cancer patients.This protocol was used to quantify breast shape differences between different modalities, and to measure the target registration error of several variants of the MRI/3D scan fusion algorithm. The fusion of single breasts without the biomechanical model of pose transformation had acceptable registration errors and accurate tumor locations. The performance of the fusion algorithm was not affected by breast volume. Further research and virtual clinical interfaces could lead to fast integration of this fusion technology into clinical practice.     

2010～2012年北京市延庆县死亡漏报调查

目的了解北京市延庆县居民死因登记工作的漏报情况及主要原因。方法采用多阶段按比例整群抽样的方法,确定分层原则,采用分层随机抽样方法抽取7个镇乡/街道共36个行政村/居委会作为调查点,以2010~2012年延庆县人口抽样死因回顾性调查数据作为实际死亡数据,将常规报告数据与之进行匹配,未匹配上的记录为漏报数据。计算漏报率并分析其在人群中的分布。结果 2010~2012年延庆县调查点实际死亡人数为456人,漏报人数为42人,总漏报率为9.21%;不同乡镇比较,珍珠泉乡漏报率最高,为22.08%,旧县镇无漏报;不同地区分类比较,非火化区漏报率最高;因脑血管病死亡漏报率最高为10.22%;2012年度漏报率最高为12.66%。结论延庆县居民死亡漏报现象仍较为严重,应进一步采取相应的措施,提高死因报告的质量。     

The fantastic future of food – celebrating 50 years of food science and technology

The Institute of Food Science and Technology is this year celebrating 50 years since its formation. But we are not planning a year of retrospection – far from it. The main focus for the Institute's celebrations is very much on the future, hence the main theme for our 50th Jubilee year; ‘The Fantastic Future of Food’. Food science and technology can provide solutions to many of the current big challenges such as food safety, sustainability, waste reduction and, of course, some aspects of nutritional health. The Institute is therefore using its 50th Jubilee to raise the profile of its activities and also launch a number of key projects which it believes will have a significant impact on some of the key issues facing the food sector. The first of these will be its Register of Food Safety Professionals which will provide independent professional accreditation at all levels for those engaged in food safety roles.     

综合医院自助挂号机用户界面设计

目的：探讨综合性医院自助挂号设备的用户界面的设计方法。方法：通过对医院自助挂号设备的用户界面的现状进行分析,综合计算机科学、心理学和人机工程学的知识,以用户为导向,对自助挂号设备的用户界面进行合理设计。结果：设计了交互性强的自助挂号界面,降低了用户的操作难度,提高了挂号速度,适应不同年龄段和文化层次的人群。结论：以用户为导向的自助挂号界面的设计能够满足患者自助挂号的操作需求。     

2012年南通市居民恶性肿瘤发病和死亡情况

目的探讨南通市恶性肿瘤的流行特征,并对该地区肿瘤登记工作质量作以简要评估。方法收集南通市恶性肿瘤的发病和死亡数据,采用Canreg4软件录人,通过Excel和SPSS软件进行整理,分析该地区恶性肿瘤的发病率、死亡率,标化发病（死亡）率、年龄别发病率（死亡率）等指标。对死亡／发病比（M／I）、病理组织学诊断所占比例（MV％）、只有死亡医学证明书比例（DCO％）、未指明部位和原发部位不明的恶性肿瘤新发病例所占的百分比（O＆U％）进行评估。结果2012年南通市恶性肿瘤发病为23736人,死亡为17464人,恶性肿瘤发病率为312．84／10万,恶性肿瘤死亡率为234．00／10万,经年龄构成调整后,发病的中标率为167．03／10万,死亡的中标率为113．38／10万。前6位高发恶性肿瘤分别为肺癌、肝癌、胃癌、食管癌、结／直肠癌、乳腺癌。肺癌在男性和女性中均居发病率的首位,全人口发病率为60．66／10万。前6位高死亡率的恶性肿瘤分别为肺癌、肝癌、食管癌、胃癌、结直肠癌、胰腺癌。肿瘤登记工作质量指标,M／I为0．74、MV％为54．86％、DCO％为0．41％、0＆u％为3．70％。结论恶性肿瘤是南通市居民的第1位死因,肺癌居恶性肿瘤发病率和死亡率之首,消化系统肿瘤占比例最高。南通市肿瘤登记数据基本反映了全市恶性肿瘤的发病和死亡情况,但仍需完善。     

探讨建立国产医疗设备认证制度的必要性与可行性

发展振兴国产医疗设备对于实施强国战略具有十分重要的意义。要发展国产医疗设备首先要对什么是国产设备有一个明确的定义。我们以核心技术为标准,定义什么是国产医疗设备。根据这个定义,提出了实施国产医疗设备注册制度的建议和具体实施方案。这一制度的实施必将对发展振兴国产医疗设备起到十分重要的作用。