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Article
Evaluation of macrohardness of recast-ed Cobalt–chromium alloy

Author: Ahmed A Al–Ali
Journal: Al-Rafidain Dental Journal مجلة الرافدين لطب الأسنان ISSN: 18121217 Year: 2007 Volume: 7 Issue: 1 Pages: 111-117
Publisher: Mosul University جامعة الموصل

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Abstract

Aims: To study the effect of recasting on the macrohardness of cobalt chromium (Co–Cr)alloy, and to evaluate the effect of finishing and polishing on it. Materials and methods: Two brand of Co–Cr alloys were used, divided into three groups, the specimens of the first group were casted from new materials, the second were casted from previously casted material without the addition of any new material (100% recast), the third were casted by combination 50% new material and 50% used material. Half of the specimens just finished and the other half were finished and polished , hardness for all of them were measured. Results: Showed that recasting, both 100% and 50%, significantly increase the macrohardness of Co–Cr alloys and no significant effect of finishing and polishing on it. Conclusion: Recasting may affect properties of Co–Cr alloy and new material should be used rather than recasted material.


Article
Evaluation of serum level of Chromium trace element and complement C3 & C4 in complicated diabetic foot
مستوى الكرم والكومبليت C4, C3 في مضاعفات سكري القدم

Authors: Hameed Mageed Alnaser د. حميد مجيد الناصر --- Estabraq Al-Wasiti
Journal: IRAQI JOURNALOF COMMUNITY MEDICINE المجلة العراقية لطب المجتمع ISSN: 16845382 Year: 2007 Volume: 20 Issue: 1 Pages: 77-84
Publisher: Al-Mustansyriah University الجامعة المستنصرية

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Abstract

Abstract Objective: To confirm the importance of Chromium trace element in complicated diabetic foot in addition to complement C3 & C4.Patients & Methods: This study was done in Al-Yarmouk Teaching Hospital “Diabetic Center” and Al-Karama Teaching Hospital throughout a period from November 2002 – July 2003. It included 60 diabetic patients who were divided into two groups, depending on the presence of complications. In addition the study included 20 healthy subjects matched for age and sex as control group. Measurement of F.B.S. was done for each patients. Measurement of serum level of Chromium, by using shimadzu atomic absorption flame emission spectrophotometer and measurement of C3 & C4 complement by using immune diffusion assay kite was also done for each subject.Results: Study reveal that there is lowered Chromium trace element and a lowered level of C3 complement than C4 among complicated diabetic foot more than other groups. Conclusion: We concluded that there is a deficiency of Chromium among a complicated diabetic patient in addition to that this study show deficiency of complement C3 more than C4. Key ward: Diabetes mellitus, chromium trace element, complement C3 and C4.

الملخص:أجريت الدراسة في م. الكرامة التعليمي والمركز الوطني للسكر في م. اليرموك التعليمي للفترة من تشرين الثاني 2002 إلى شهر تموز 2003 حيث تم دراسة عنصر الكروميوم في الدم مع قياس احد الأجزاء المهمة في الجهاز المناعي سي 3 وسي 4 عند المرضى المصابين بالسكر واجريت الدراسة على ثمانون مريض قسموا إلى ثلاثة مجاميع المجموعة الاولى تحتوي على (40) مريض مصابين بالسكر والمجوعة الثانية تحتوي على (20) مريض مصابين بالسكر مع مضاعفاته والتي تشمل التهاب الانسجة الرخوة في القدم مع كانكرين والمجموعة الثالثة تحتوي على 20 شخص غير مصاب وقد تبين ان المرضى المصابين بالسكر مع مضاعفاته هنالك انخفاض في عنصر الكروميوم في الدم بالمقارنة بالمرضى الغير مصابين بالسكر مع انخفاض في احد عناصر الجهاز المناعي سي 3 اكثر من سي 4 وهذا يدل على ان عنصر الكروميوم يعتبر من العناصر المهمة لعمل الأنسولين في الدم.

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