检索结果-南通市图书馆

Titanium allergy or not? “Impurity” of titanium implant materials

Health 2010年第4期2卷 306-310页

作者： Thomas Harloff Wolfgang Honle Ulrich Holzwarth Rainer Bader Peter Thomas Alexander Schuh Research Unit Neumarkt Clinical CenterNeumarktGermany Orthopedic clinic Neumarkt NeumarktGermany MedTitan ErlangenGermany Orthopedic clinic and polyclinic University of RostockRostockGermany clinic and polyclinic for dermatology and allergology of the ludwig-maximilians-university of munich MunichGermany

For patients suffering from allergies to nickel, chrome and cobalt, titanium implants are the implants of choice. Nevertheless, titanium implant sensitivity has been reported in the form of “allergies” and an increasing number of patients are confused. This paper aims to use spectral analysis as a diagnostic tool for analyzing different titanium implant alloys in order to determine the percentage of the alloy components and additions that are known to cause allergies. Different materials, such as sponge titanium, TiAl6Nb7, Ti21SRx, TiAl6V4 [forged alloy], TiAl6V4 [cast alloy], TMZF, pure titanium [c. p. 1] and iodide titanium were analyzed for the presence of the elements that have been associated with allergic reactions using spectral analysis. All the implant material samples contained traceable amounts of Be, Cd, Co, up to a maximum of 0.001 percent by weight [wt.%], Cr up to 0.033 wt.%, Cu up to 0.007 wt.%, Hf up to 0.035 wt.%, Mn up to 0.007 wt.%, Ni up to 0.031 wt.%, and Pd up to 0.001 wt.%. This paper demonstrates that all the investigated implant material samples contained a low but consistent percentage of components that have been associated with allergies. For example, low nickel contents are related to the manufacturing pro- cess and are completely dissolved in the titanium grid. Therefore, they can virtually be classified as “impurities”. Under certain circumstances, these small amounts may be sufficient to trigger allergic reactions in patients suffering from the corresponding allergies, such as a nickel, palladium or chrome allergy.

关键词： Allergy Implant Nickel Spectral Analysis Titanium

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

3个家系环纹发的脆性、形态学和检测研究最新进展

引用

世界核心医学期刊文摘（皮肤病学分册） 2005年第3期1卷 27-28页

作者： Giehl K.A. Ferguson D.J.P. Dawber R.P.R. 马慧群 Department of dermatology Ludwig-Maximilian University Munich Frauenlobstr. 9- 11 80337 Mu nich Germany

Background. Pili annulati is an inherited hair shaft abnormality with a wide range of clinical expression. Objective. We have examined closely three kindreds to reveal levels and character of expression of the phenotype and supplement cu rrent literature on the threshold for detection and aspects of hair shaft fragil ity. Patients and methods. Eleven cases of pili annulati from three families wer e included in a clinical and morphological study. All cases were assessed clinic ally and by light and scanning electron microscopy (SEM) of hair shafts. In addi tion, transmission electron microscopy (TEM) (four patients) and amino acid anal ysis (three patients) were undertaken on clinically overt cases. Results. Examination by light microscopy with a fluid mountant w as more sensitive than clinical examination, increasing the detection rate by 12 0% . Microscopic examination revealed that the characteristic periodic bands be come less frequent distally in the hair shaft. Microscopic features of weatherin g were found in two cases, adding pili annulati to the list of structural hair s haft dystrophies that may weaken hair and dispose to weathering. Amino acid anal ysis of the hair of three patients with pili annulati showed elevated lysine and decreased cystine content compared to 12 normal controls, consistent with the r educed threshold for weathering. Conclusion. Careful light microscopy with fluid -mounted hair is needed to detect subjects mildly affected by pili annulati. E xpression of the phenotype varieswidely between individuals, between hairs andwi thin hairs of the same individual,where ageing of the hair diminishes detectable features.

关键词：环纹发毛干光学显微镜检查临床体格检查封固电镜扫描营养不良性发现率显性表达透射电镜检查

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：