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| 1 | 萌出诱导矫治器治疗儿童上颌中切牙间隙的临床初探及三维数字化技术分析显示文摘目的 探讨萌出诱导矫治器治疗儿童上颌中切牙间隙的效果,并借助三维数字化技术进行分析.方法 对13例存在上颌中切牙间隙的病例应用萌出诱导矫治器进行矫治,应用SmartOptics Activity 880牙颌模型扫描仪,获取患儿治疗前后三维牙颌数字模型,应用三维逆向工程软件测量上、下中切牙在三维方向上的移动变化.对矫治前后覆(牙合)覆盖的测量值,应用配对t检验进行比较,以双侧P<0.05为差异有统计学意义.结果 11例病例上中切牙间隙完全关闭,左右上中切牙平均近中位移量分别为1.17±0.20 mm和1.23±0.22 mm,平均覆(牙合)由治疗前的4.97±1.49 mm减小为治疗后的2.61±0.79 mm(t=8.083,P<0.05),平均覆盖由治疗前的4.95±1.86 mm减小为治疗后的2.66±0.58 mm(t=5.723,P<0.05),差异均有显著性.结论 萌出诱导矫治器可以治疗儿童上颌中切牙间隙,在关闭牙间隙的同时有改善覆(牙合)覆盖的作用. | 王郁 赵一姣 李成皓 王宇光 王勇 Juha Eerik Varrela 岳江 葛立宏 | 2015 | 中华口腔正畸学杂志2015，22，2： | 7 |
| 2 | 萌出诱导矫治器治疗儿童个别前牙反的三维数字化分析显示文摘目的:探讨萌出诱导矫治器治疗混合牙列期儿童个别前牙反的临床效果。方法:选择10例存在个别前牙反的混合牙列期患儿,共计12颗前牙,用藻酸盐采取上、下颌印模并灌制硬石膏模型,送做萌出诱导矫治器,应用该矫治器进行治疗。通过Smart Optics Activity 880牙颌模型扫描仪,获取患儿治疗前、后的三维牙颌数字模型,应用逆向工程软件Geomagic Studio 2012构建三维重叠模型,利用Imageware 13.2软件测量反的上、下切牙在三维方向上的移动变化,对矫治前、后的覆、覆盖进行测量。应用铜丝测量法直接测量上、下颌牙弓弧长,相应的牙冠宽度(未萌出的恒牙按照X线片法预测牙冠宽度)减去牙弓弧长计算上、下颌牙弓的拥挤程度。使用SPSS17.0软件对同一患儿的术前、术后测量值进行统计学分析,首先对测量指标的术后改变量进行正态性检验,发现符合正态分布,然后采用配对样本t检验,双侧检验,显著性水平为0.05。结果:疗程为(5.6±2.7)个月,矫治过程中,上、下切牙在三维位移上均主要表现为唇倾(P<0.001、P=0.025)。经过萌出诱导矫治器的治疗,覆减少了(1.01±0.9)mm(t=-3.531,P=0.006),差异具有统计学意义,而术前、术后覆盖的差异不具有统计学意义(t=0.771,P=0.460)。上颌拥挤度减少了(1.9±0.99)mm(t=-6.042,P<0.001),下颌拥挤度减少了(1.9±0.74)mm(t=-8.143,P<0.001),差异均具有统计学意义。结论:萌出诱导矫治器可以治疗混合牙列期个别前牙反,同时有建立正常覆、覆盖,排齐牙齿的作用。 | 王旭 章晶晶 原福松 王郁 李成皓 Juha Eerik Varrela 岳江 葛立宏 | 2018 | 北京大学学报(医学版)2018，50，3： | 6 |
| 3 | New Immunochromatographic Rapid Test for Diagnosis of Acute Puumala Virus Infection 显示文摘 | Helena Hujakka Vesa Koistinen Pekka Eerik inen | 2001 | J Clin Microbiology2001，39，6： | 1 |
| 4 | A site dependent simultaneous growth projection model for Pinus kesiya plantations in Zambia and Zimbabwe 显示文摘 | EERIK~INEN K | 2002 | Forest Science2002，48，3： | 1 |
| 5 | Expressio nal changes in the intracellular melanogen esis pathw ays and their possible role the patho genesis of v itiligo显示文摘 | Külli Kingo Eerik Aunin Maire Karelson | | 0，，： | 1 |
| 6 | Fatigue Crack Propagation Model Based on a Local Strain Approach显示文摘 | Eerik Peeker Erkki Niemi | 1999 | Journal of Constructional Steel Research1999，49，： | 1 |
| 7 | Denaturing HPLC for identifying bacteria显示文摘 | William H Dadid S Eerik H | 2002 | BioTeehniques2002，33，8： | 1 |
| 8 | Identifying and quantifying structural characteristicsof heterogeneous boreal forests using laser scanner data显示文摘 | Maltamo M Packalén P Yu X Eerik?inen K Hyypp? J Pitk?nen J | 2005 | Forest Ecology and Management2005，216，： | 1 |
| 9 | Denaturing HPLC for identifying bacteria显示文摘 | William H Dadid S Eerik H | 2002 | BioTechniques2002，33，8： | 1 |
| 10 | Models for the regeneration establishment and the development of established seedlings in uneven-aged,Norway spruce dominated forest stands of southern Finland显示文摘 | Eerik(a)inen K Miina J Valkonen S | | 0，，： | 1 |
| 11 | Denaturing HPLC for identifying bacteria显示文摘 | William H Dadid S Eerik H | 2002 | Bio Techniques2002，33，8： | 1 |
| 12 | Total ankle replacement: a population-based study of 515 cases from the Finnish Arthroplasty Register显示文摘 | Eerik T Skytt? Helka Koivu Antti Eskelinen Mikko Ik?valko Pekka Paavolainen Ville Remes | 2010 | Acta Orthopaedica2010，，1： | 1 |
| 13 | Inventory of aspen trees in spruce dominated stands in conserva-tion area显示文摘Background: The occurrence of aspen trees increases the conservation value of mature conifer dominated forests.Aspens typically occur as scattered individuals among major tree species, and therefore the inventory of aspens is challenging.Methods: We characterized aspen populations in a boreal nature reserve using diameter distribution, spatial pattern, and forest attributes: volume, number of aspens, number of large aspen stems and basal area median diameter. The data were collected from three separate forest stands in Koli National Park, eastern Finland. At each site, we measured breast height diameter and coordinates of each aspen. The comparison of inventory methods of aspens within the three stands was based on simulations with mapped field data. We mimicked stand level inventory by locating varying numbers of fixed area circular plots both systematically and randomly within the stands. Additionally, we also tested if the use of airborne laser scanning(ALS) data as auxiliary information would improve the accuracy of the stand level inventory by applying the probability proportional to size sampling to assist the selection of field plot locations.Results: The results showed that aspens were always clustered, and the diameter distributions indicated different stand structures in the three investigated forest stands. The reliability of the volume and number of large aspen trees varied from relative root mean square error figures above 50% with fewer sample plots(5–10) to values of25%–50% with 10 or more sample plots. Stand level inventory estimates were also able to detect spatial pattern and the shape of the diameter distribution. In addition, ALS-based auxiliary information could be useful in guiding the inventories, but caution should be used when applying the ALS-supported inventory technique.Conclusions: This study characterized European aspen populations for the purposes of monitoring and management of boreal conservation areas. Our results suggest that if the number of sample plots is adequate,i.e. 10 or more stand level inventory will provide accurate enough forest attributes estimates in conservation areas(minimum accuracy requirement of RMSE% is 20%–50%). Even for the more ecologically valuable attributes, such as diameter distribution, spatial pattern and large aspens, the estimates are acceptable for conservation purposes. | Matti Maltamo Annukka Pesonen Lauri Korhonen Jari Kouki Mikko Vehmas Kalle Eerik?inen | 2015 | Forest Ecosystems2015，2，2： | 0 |
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