fa مقایسه تاثیر دستگاههای LED با QHT بر میزان ریزنشت ترمیم کامپوزیتی مواد دندانی Dental materiall مطالعه اصیل original article <h5 style="TEXT-ALIGN: justify MARGIN: 0in 0in 0pt unicode-bidi: embed DIRECTION: rtl" dir="rtl"><font size="3"><b><span lang="FA" style="FONT-FAMILY: "B Nazanin" mso-ascii-font-family: 'Times New Roman Bold' mso-hansi-font-family: 'Times New Roman Bold' mso-bidi-language: FA">خلاصه:</span></b><span dir="ltr"></span><b><span lang="FA" style="FONT-FAMILY: "Times New Roman Bold","serif" mso-bidi-font-family: 'B Nazanin' mso-bidi-language: FA" dir="ltr"><span dir="ltr"></span> </span></b><b><span lang="FA" style="FONT-FAMILY: "B Nazanin" mso-ascii-font-family: 'Times New Roman Bold' mso-hansi-font-family: 'Times New Roman Bold' mso-bidi-language: FA"><p></p></span></b></font></h5><h5 style="TEXT-ALIGN: justify MARGIN: 0in 0in 0pt unicode-bidi: embed DIRECTION: rtl" dir="rtl"><font size="3"><b><span lang="FA" style="FONT-FAMILY: "B Nazanin" mso-ascii-font-family: 'Times New Roman Bold' mso-hansi-font-family: 'Times New Roman Bold' mso-bidi-language: FA">سابقه و هـدف:</span></b><span dir="ltr"></span><b><span lang="FA" style="FONT-FAMILY: "Times New Roman Bold","serif" mso-bidi-font-family: 'B Nazanin' mso-bidi-language: FA" dir="ltr"><span dir="ltr"></span> </span></b><b><span lang="FA" style="FONT-FAMILY: "B Nazanin" mso-ascii-font-family: 'Times New Roman Bold' mso-hansi-font-family: 'Times New Roman Bold' mso-bidi-language: FA"><p></p></span></b></font></h5><h5 style="TEXT-ALIGN: justify MARGIN: 0in 0in 0pt unicode-bidi: embed DIRECTION: rtl" dir="rtl"><font size="3"><span lang="FA" style="FONT-FAMILY: "B Nazanin" mso-ascii-font-family: 'Times New Roman Bold' mso-hansi-font-family: 'Times New Roman Bold' mso-bidi-language: FA">امروزه دستگاههای </span><span lang="X-NONE" style="FONT-FAMILY: "Times New Roman Bold","serif" mso-bidi-font-family: 'B Nazanin' mso-bidi-language: FA" dir="ltr">LED </span><span dir="rtl"></span><span lang="X-NONE" style="FONT-FAMILY: "B Nazanin" mso-ascii-font-family: 'Times New Roman Bold' mso-hansi-font-family: 'Times New Roman Bold' mso-bidi-language: FA"><span dir="rtl"></span><span style="mso-spacerun: yes"><font face="B Nazanin"> </font></span></span><span lang="FA" style="FONT-FAMILY: "B Nazanin" mso-ascii-font-family: 'Times New Roman Bold' mso-hansi-font-family: 'Times New Roman Bold' mso-bidi-language: FA">به دلیل مزایایشان در بین دندانپزشکان محبوبیت زیادی پیدا کرده‌اند، بنابراین ارزیابی ریزنشت ترمیمهای دندانی متعاقب کیور نمودن با این دستگاهها یک اولویت پژوهشی است. در این مطالعه ریزنشت حفرات کلاس</span><span lang="X-NONE" style="FONT-FAMILY: "Times New Roman Bold","serif" mso-bidi-font-family: 'B Nazanin' mso-bidi-language: FA" dir="ltr">V</span><span dir="rtl"></span><span lang="X-NONE" style="FONT-FAMILY: "B Nazanin" mso-ascii-font-family: 'Times New Roman Bold' mso-hansi-font-family: 'Times New Roman Bold' mso-bidi-language: FA"><span dir="rtl"></span> </span><span lang="FA" style="FONT-FAMILY: "B Nazanin" mso-ascii-font-family: 'Times New Roman Bold' mso-hansi-font-family: 'Times New Roman Bold' mso-bidi-language: FA">کامپوزیت پس از کیور نمودن آنها بوسیله </span><span lang="X-NONE" style="FONT-FAMILY: "Times New Roman Bold","serif" mso-bidi-font-family: 'B Nazanin' mso-bidi-language: FA" dir="ltr">LED</span><span dir="rtl"></span><span lang="FA" style="FONT-FAMILY: "B Nazanin" mso-ascii-font-family: 'Times New Roman Bold' mso-hansi-font-family: 'Times New Roman Bold' mso-bidi-language: FA"><span dir="rtl"></span> و </span><span lang="X-NONE" style="FONT-FAMILY: "Times New Roman Bold","serif" mso-bidi-font-family: 'B Nazanin' mso-bidi-language: FA" dir="ltr">QHT</span><span dir="rtl"></span><span><span dir="rtl"></span> با یکدیگر مقایسه شدند. <p></p></span></font></h5><h5 style="TEXT-ALIGN: justify MARGIN: 0in 0in 0pt unicode-bidi: embed DIRECTION: rtl" dir="rtl"><font size="3"><span>مواد و روش‌ها: در این تحقیق تجربی- آزمایشگاهی از کامپوزیت</span><font face="Times New Roman"><span lang="X-NONE" style="mso-bidi-font-family: 'B Nazanin' mso-bidi-language: FA" dir="ltr">Z100 (3M ESPE, USA )</span><span dir="rtl"></span></font><span lang="X-NONE" style="FONT-FAMILY: "B Nazanin" mso-bidi-language: FA"><span dir="rtl"></span> </span><span lang="FA" style="FONT-FAMILY: "B Nazanin" mso-bidi-language: FA">استفاده شد. حفرات کلاس</span><font face="Times New Roman"><span lang="X-NONE" style="mso-bidi-font-family: 'B Nazanin' mso-bidi-language: FA" dir="ltr">V </span><span dir="rtl"></span></font><span lang="X-NONE" style="FONT-FAMILY: "B Nazanin" mso-bidi-language: FA"><span dir="rtl"></span><span style="mso-spacerun: yes"><font face="B Nazanin"> </font></span></span><span lang="FA" style="FONT-FAMILY: "B Nazanin" mso-bidi-language: FA">با اندازه (3×2×2)میلیمتردر سطوح باکال30 دندان پره مولر سالم انسانی تعبیه شده و با کامپوزیت</span><font face="Times New Roman"><span lang="X-NONE" style="mso-bidi-font-family: 'B Nazanin' mso-bidi-language: FA" dir="ltr">Z100 </span><span dir="rtl"></span></font><span lang="X-NONE" style="FONT-FAMILY: "B Nazanin" mso-bidi-language: FA"><span dir="rtl"></span><span style="mso-spacerun: yes"><font face="B Nazanin"> </font></span></span><span lang="FA" style="FONT-FAMILY: "B Nazanin" mso-bidi-language: FA">ترمیم شدند. نمونه ها به دو گروه 15 تایی تقسیم شدند. گروه اول توسط دستگاه هالوژن 5/2</span><span dir="ltr"></span><span lang="X-NONE" style="mso-bidi-font-family: 'B Nazanin' mso-bidi-language: FA" dir="ltr"><span dir="ltr"></span><font face="Times New Roman"><span style="mso-spacerun: yes">  </span>coltolux </font></span><span lang="FA" style="FONT-FAMILY: "B Nazanin" mso-bidi-language: FA">و دومی با دستگاه</span><font face="Times New Roman"><span lang="X-NONE" style="mso-bidi-font-family: 'B Nazanin' mso-bidi-language: FA" dir="ltr">LED Apoza </span><span dir="rtl"></span></font><span lang="X-NONE" style="FONT-FAMILY: "B Nazanin" mso-bidi-language: FA"><span dir="rtl"></span><span style="mso-spacerun: yes"><font face="B Nazanin"> </font></span></span><span lang="FA" style="FONT-FAMILY: "B Nazanin" mso-bidi-language: FA">برای مدت 40 ثانیه کیور شدند و بعد تحت پروسه ترمو سایکلینگ</span><span dir="ltr"></span><span lang="FA" style="mso-bidi-font-family: 'B Nazanin' mso-bidi-language: FA" dir="ltr"><span dir="ltr"></span><font face="Times New Roman"> </font></span><span dir="rtl"></span><span lang="FA" style="FONT-FAMILY: "B Nazanin" mso-bidi-language: FA"><span dir="rtl"></span>5-55 (درجه سانتی گراد)</span><span dir="ltr"></span><span lang="FA" style="mso-bidi-font-family: 'B Nazanin' mso-bidi-language: FA" dir="ltr"><span dir="ltr"></span><font face="Times New Roman"> </font></span><span lang="FA" style="FONT-FAMILY: "B Nazanin" mso-bidi-language: FA">و 500 دور قرار گرفتند. سپس نمونه‌ها برا ی2 ساعت در محلول نیترات نقره قرار گرفتند و به دنبال آن برای مدت 6 ساعت در محلول ظهور رادیولوژی قرار داده شدند تا احیای نقره به یونهای فلزی تسهیل گردد. نمونه ها سپس برش داده شده و با استریو میکروسکوپ با بزرگنمایی 40 بررسی شدند. آنالیز آماری با آزمون</span><span dir="ltr"></span><span lang="X-NONE" style="mso-bidi-font-family: 'B Nazanin' mso-bidi-language: FA" dir="ltr"><span dir="ltr"></span><font face="Times New Roman"> Mann whitney</font></span><span dir="rtl"></span><span lang="FA" style="FONT-FAMILY: "B Nazanin" mso-bidi-language: FA"><span dir="rtl"></span><font face="B Nazanin"><span style="mso-spacerun: yes">  </span>و </font></span><font face="Times New Roman"><span lang="X-NONE" style="mso-bidi-font-family: 'B Nazanin' mso-bidi-language: FA" dir="ltr">Fisher</span><span dir="rtl"></span></font><span lang="FA" style="FONT-FAMILY: "B Nazanin" mso-bidi-language: FA"><span dir="rtl"></span> انجام گرفت.<p></p></span></font></h5><h5 style="TEXT-ALIGN: justify MARGIN: 0in 0in 0pt unicode-bidi: embed DIRECTION: rtl" dir="rtl"><font size="3"><span>یافته‌ها: میزان ریزنشت در نواحی ژنژیوال ترمیم</span><span dir="ltr"></span><span lang="AR-SA" style="mso-bidi-font-family: 'B Nazanin' mso-ansi-language: EN-US" dir="ltr"><span dir="ltr"></span><font face="Times New Roman"> </font></span><span lang="AR-SA" style="FONT-FAMILY: "B Nazanin"">ها در گروه <font face="B Nazanin"><span style="mso-spacerun: yes"> </span>دستگاه </font></span><font face="Times New Roman"><span style="mso-bidi-font-family: 'B Nazanin' mso-ansi-language: EN-US" dir="ltr">LED</span><span dir="rtl"></span></font><span style="FONT-FAMILY: "B Nazanin""><span dir="rtl"></span> </span><span lang="FA" style="FONT-FAMILY: "B Nazanin" mso-bidi-language: FA mso-ansi-language: EN-US">و هالوِژن به ترتیب35/0</span><span lang="FA" style="mso-bidi-language: FA mso-ansi-language: EN-US"><font face="Times New Roman">±</font></span><span lang="FA" style="FONT-FAMILY: "B Nazanin" mso-bidi-language: FA mso-ansi-language: EN-US">13/1و 05/1</span><span lang="FA" style="mso-bidi-language: FA mso-ansi-language: EN-US"><font face="Times New Roman">±</font></span><span lang="FA" style="FONT-FAMILY: "B Nazanin" mso-bidi-language: FA mso-ansi-language: EN-US">6/1و در نواحی اکلوزال 43/0</span><span lang="FA" style="mso-bidi-language: FA mso-ansi-language: EN-US"><font face="Times New Roman">±</font></span><span lang="FA" style="FONT-FAMILY: "B Nazanin" mso-bidi-language: FA mso-ansi-language: EN-US">2/0 و35/0</span><span lang="FA" style="mso-bidi-language: FA mso-ansi-language: EN-US"><font face="Times New Roman">±</font></span><span lang="FA" style="FONT-FAMILY: "B Nazanin" mso-bidi-language: FA mso-ansi-language: EN-US">13/0</span><span lang="AR-SA" style="FONT-FAMILY: "B Nazanin""> بود و تفاوت ریز نشت بین دو دستگاه از لحاظ آماری معنی دار نبود(2/0></span><font face="Times New Roman"><span style="mso-bidi-font-family: 'B Nazanin' mso-ansi-language: EN-US" dir="ltr">P</span><span dir="rtl"></span></font><span lang="AR-SA" style="FONT-FAMILY: "B Nazanin""><span dir="rtl"></span>) و(4/0></span><font face="Times New Roman"><span style="mso-bidi-font-family: 'B Nazanin' mso-ansi-language: EN-US" dir="ltr">P</span><span dir="rtl"></span></font><span><span dir="rtl"></span>).<p></p></span></font></h5><h5 style="TEXT-ALIGN: justify MARGIN: 0in 0in 0pt unicode-bidi: embed DIRECTION: rtl" dir="rtl"><font size="3"><span>نتیجه گیری: استفاده از دستگاه</span><font face="Times New Roman"><span lang="X-NONE" style="mso-bidi-font-family: 'B Nazanin' mso-bidi-language: FA" dir="ltr">LED</span><span dir="rtl"></span></font><span lang="FA" style="FONT-FAMILY: "B Nazanin" mso-bidi-language: FA"><span dir="rtl"></span> یا </span><font face="Times New Roman"><span lang="X-NONE" style="mso-bidi-font-family: 'B Nazanin' mso-bidi-language: FA" dir="ltr">QTH</span><span dir="rtl"></span></font><span lang="FA" style="FONT-FAMILY: "B Nazanin" mso-bidi-language: FA"><span dir="rtl"></span> برای کیور کردن کامپوزیت </span><font face="Times New Roman"><span lang="X-NONE" style="mso-bidi-font-family: 'B Nazanin' mso-bidi-language: FA" dir="ltr">Z100</span><span dir="rtl"></span></font><span lang="FA" style="FONT-FAMILY: "B Nazanin" mso-bidi-language: FA"><span dir="rtl"></span> منجربه ریز نشت مشابهی در لبه های مینایی و عاجی می شود. <p></p></span></font></h5> <p align="left"> <strong> </strong></p><p align="left">Abstract: </p><p align="left"> <strong> </strong></p><p align="left"> <strong> Background and Aim: </strong>In recent years, LED curing units have become more popular among the dentists due to their overall superior attributes. Therefore, assessment of the leakage levels in resin restorations after curing with these nearly new devices is a priority. This study was conducted with the aim to compare the microleakage in class V restorations after being cured with LED and QTH light units. </p><p align="left"> <strong> Materials and Methods: </strong>Microfilled composite Z100 ( 3M ESPE,USA)was used on 30 samples in this experimental study. Separate class V cavities (3mm× 2mm×2mm) were prepared on buccal surfaces of 30 sound freshly extracted premolars and then filled with Z100 composite resin. Samples were divided into two groups of 15 each. The first group was cured with a halogen light curing unit (Coltolux 2.5,USA) and the second with a LED unit (Apoza,Japan) for 40 seconds. Then, the specimens were subjected to thermo cycling (5-55º for 500 cycles). Afterwards, they were covered with a nail polish 1 mm away from cervical margin and they were kept in 50% aqueous silver nitrate solution by weight for 2 hours. The samples were then placed in developing solution for 6 hours, after which, the specimens were sectioned and observed under stereomicroscope at x40 magnification. The data was analyzed with Mann Whitney and Fisher tests. </p><p align="left"> <strong> Results: </strong>Microleakage levels in gingival and occlusal margins of resins restoration, in LED and QHT units were 1.13±0.35 and 1.6±1.05 and 0.2±0.43 , 0.13±0.35 respectively. There was no significant difference between the efficacy of LED and QHT units in terms of microleakage levels found in the composite resin restorations (p<0.2), (p<0.4). </p><p align="left"> <strong> </strong></p><p align="left"> <strong> Conclusion: </strong>Application of QTH or LED curing unit to cure Z100 composite leads to similar microleakage levels in enamel/dentin margins. </p><p align="left">  </p> ریزنشت، دندانی، عوامل باندینگ عاجی، دستگاه لایت کیور Leakage, Dental, Dentin bonding, Agents, Curing light 192 198 http://jrds.ir/browse.php?a_code=A-10-596-2&slc_lang=fa&sid=1 Saeed Nemati anaraki سعید نعمتی انارکی 10031947532846003555 10031947532846003555 No Hoda Safaie هدی صفایی hoda.safaie@gmail.com 10031947532846003556 10031947532846003556 Yes Operative Dept Dental School of Tehran University of Medical Sciences, Tehran, Iran. تخصصی گروه آموزشی ترمیمی و زیبایی، دانشگاه علوم پزشکی و خدمات درمانی تهران Farinaz Askarpour فریناز عسگرپور 10031947532846003557 10031947532846003557 No Ali Saffar hajhosseini علی صفار حاج حسینی 10031947532846003558 10031947532846003558 No