journal of research in dental sciences

fa بررسی اثر استرس بر میزان آزاد سازی یون های فلزی در بزاق بیماران تحت درمان ارتودنسی ثابت Effect of Stress on Metal ion Release in Saliva of Patients Treated with Fixed Orthodontic - A pilot study جراحی- oral surgery مطالعه اصیل original article   <h5 dir="rtl" style="margin: 0cm 0cm 0pt text-align: justify unicode-bidi: embed direction: rtl"><span b="" dir="rtl" face="Times New Roman" font="" h5="" lang="AR-SA" mso-ascii-font-family:="" mso-bidi-font-family:="" mso-hansi-font-family:="" new="" roman="" size="3" span="" style="font-family: " times="">سابقه و هدف:<span .="" 9pt="" b="" dir="ltr" face="Times New Roman" font="" font-size:="" lang="AR-SA" mso-ascii-font-family:="" mso-bidi-language:="" mso-hansi-font-family:="" new="" roman="" size="3" span="" style="font-family: " times="">) (Cr در بزاق بیماران تحت درمان دستگاه های ثابت ارتودنسی ترتیب داده شد.</h5>   <h5 dir="rtl" style="margin: 0cm 0cm 0pt text-align: justify unicode-bidi: embed direction: rtl"><span .="" 10="" 10pt="" :="" absorption="" atomic="" b="" calibri="" dir="rtl" fa="" face="Times New Roman" font="" font-size:="" h5="" hoc="" lang="AR-SA" mso-ansi-language:="" mso-ascii-font-family:="" mso-bidi-font-family:="" mso-bidi-language:="" mso-hansi-font-family:="" new="" post="" quasi-clinical="" roman="" size="3" social="" span="" stress="" style="font-family: " times="" trier="">مقدار یون نیکل12/78 در T114/9 در T3 در مقایسه با T1<span .="" b="" dir="ltr" face="Times New Roman" font="" lang="AR-SA" mso-ansi-language:="" mso-ascii-font-family:="" mso-hansi-font-family:="" new="" roman="" size="3" span="" style="font-family: " times="">مقدار یون کروم بزاق از 3/38± به 2/68± تغییر یافت که این تغییرات در مورد کروم معنادار نبود. (0/05<P)</h5>   <h5 dir="rtl" style="margin: 0cm 0cm 0pt text-align: justify unicode-bidi: embed direction: rtl">: به نظر میرسد ایجاد استرس باعث افزایش معنادارآزادسازی نیکل از اپلانیس های ارتودنسی در بزاق میگردد این در حالی است که محتوای کروم اگر چه با گذشت زمان به تدریج افزایش مییابد اما این تغییرات از نظر آماری معنادار نمی باشد.</h5>     Background and Aim: Corrosion of orthodontic appliances is influenced by changes in the saliva composition resulting from physiologic stress. This study was conducted to assess the effect of stress on the level of nickel (Ni) and chromium (Cr) ions in the saliva of patients treated with fixed orthodontic appliances.       Materials and Methods: Ten patients participated in this study. Saliva samples were collected at three different stages: T1: before placement of orthodontic appliances, T2: Three months after placement of fixed orthodontic appliances before stress, T3: 15 minutes after induction of stress (Trier Social Stress Test). Ion levels were measured by Atomic Absorption Spectophotometry. Data were analyzed by ANOVA and post hoc Bonferroni statistical tests.       Results: Ni levels increased from 12.78 ± 5.26 in T1 to 14.9 ± 5.75 in T3 and this increase was statistically significant. (P<0.05) Chromium (Cr) levels changed from 5.21 ± 3.38 to 6.27 ± 2.68, and the changes were not significant.(P<0.05)       Conclusion: Stress significantly increases the release of Ni ions from orthodontic appliances into the saliva. Chromium levels of the saliva elevate gradually with time, however the change is not statistically significant.   آلیاژهای ارتودنسی , نیکل , کروم , بزاق , استرس , Trier Social Stress Test Orthodontic alloys, nickel, chromium, saliva, stress, Trier Social Stress Test. 65 70 http://jrds.ir/browse.php?a_code=A-10-791-5&slc_lang=fa&sid=1 F Amini فریبرز امینی 10031947532846009739 10031947532846009739 No H Rahimi هژیر رحیمی Hajirrahimi@gmail.com 10031947532846009740 10031947532846009740 Yes S Harandi ساغر هرندی 10031947532846009741 10031947532846009741 No R Hajrezaee ریحانه حاج رضایی 10031947532846009742 10031947532846009742 No S Ayramlou سارا آیرملو 10031947532846009743 10031947532846009743 No F Baladi فاطمه بلدی 10031947532846009744 10031947532846009744 No