fa بررسی اثر شوینده هیپوکلریت سدیم بر مقاومت چرخشی فایلهای روتاری نیکل-تیتانیومNeolix و X Pro Gold اندو Endo مطالعه اصیل original article <span style="font-size:12pt"><span style="line-height:115%"><span style="text-autospace:none"><span style="direction:rtl"><span style="unicode-bidi:embed"><span new="" roman="" style="font-family:" times=""><b><span b="" lang="AR-SA" nazanin="" style="font-family:"><span style="color:black">سابقه و هدف</span></span></b><span b="" lang="AR-SA" nazanin="" style="font-family:"><span style="color:black">: </span></span><span lang="FA" style="font-size:11.0pt"><span style="line-height:115%"><span b="" nazanin="" style="font-family:"><span style="color:black">فایل های</span></span></span></span><span dir="LTR" style="font-size:11.0pt"><span style="line-height:115%"><span style="color:black">NiTi</span></span></span><span lang="FA" style="font-size:11.0pt"><span style="line-height:115%"><span b="" nazanin="" style="font-family:"><span style="color:black"> به دلیل خستگی چرخشی(</span></span></span></span><span dir="LTR" style="font-size:11.0pt"><span style="line-height:115%"><span style="color:black">Cyclic fatigue</span></span></span><span lang="FA" style="font-size:11.0pt"><span style="line-height:115%"><span b="" nazanin="" style="font-family:"><span style="color:black">) یا خستگی خمشی(</span></span></span></span><span dir="LTR" style="font-size:11.0pt"><span style="line-height:115%"><span style="color:black">Torsional loading</span></span></span><span lang="FA" style="font-size:11.0pt"><span style="line-height:115%"><span b="" nazanin="" style="font-family:"><span style="color:black">)خطر شکست بالایی دارند.ضدعفونی و آماده سازی شیمی مکانیکی(</span></span></span></span><span dir="LTR" style="font-size:11.0pt"><span style="line-height:115%"><span style="color:black">chemomechanical</span></span></span><span lang="FA" style="font-size:11.0pt"><span style="line-height:115%"><span b="" nazanin="" style="font-family:"><span style="color:black">) می تواند باعث خوردگی ابزارهای اندودنتیک شود که ممکن است مقاومت در برابر شکسگی وسیله را تضعیف کند. این مطالعه با هدف بررسی اثر شوینده هیپوکلریت سدیم بر مقاومت چرخشی فایل های روتاری نیکل-تیتانیوم</span></span></span></span><span dir="LTR" style="font-size:11.0pt"><span style="line-height:115%"><span style="color:black">Neolix</span></span></span><span lang="FA" style="font-size:11.0pt"><span style="line-height:115%"><span b="" nazanin="" style="font-family:"><span style="color:black"> و </span></span></span></span><span dir="LTR" style="font-size:11.0pt"><span style="line-height:115%"><span style="color:black">X Pro Gold</span></span></span><span lang="FA" style="font-size:11.0pt"><span style="line-height:115%"><span b="" nazanin="" style="font-family:"><span style="color:black"> انجام گرفت.</span></span></span></span></span></span></span></span></span></span><br> <span style="font-size:12pt"><span style="line-height:115%"><span style="text-autospace:none"><span style="direction:rtl"><span style="unicode-bidi:embed"><span new="" roman="" style="font-family:" times=""><b><span b="" lang="FA" nazanin="" style="font-family:"><span style="color:black">مواد و روش ها:</span></span></b>&nbsp; <span lang="FA" style="font-size:11.0pt"><span style="line-height:115%"><span b="" nazanin="" style="font-family:"><span style="color:black">دراین تحقیق تجربی آزمایشگاهی 32فایل (16 عدد</span></span></span></span><span dir="LTR" style="font-size:11.0pt"><span style="line-height:115%"><span style="color:black">Neolix (Neolix,France</span></span></span><span lang="FA" style="font-size:11.0pt"><span style="line-height:115%"><span b="" nazanin="" style="font-family:"><span style="color:black">) و 16 عدد</span></span></span></span><span dir="LTR" style="font-size:11.0pt"><span style="line-height:115%"><span style="color:black">X Pro Gold (Easyinsmile,China) (25</span></span></span><span lang="FA" style="font-size:11.0pt"><span style="line-height:115%"><span b="" nazanin="" style="font-family:"><span style="color:black"> میلیمتری سایز 25روتاری به 2 گروه تقسیم شدند (</span></span></span></span><span dir="LTR" style="font-size:11.0pt"><span style="line-height:115%"><span style="color:black">n=16</span></span></span><span lang="FA" style="font-size:11.0pt"><span style="line-height:115%"><span b="" nazanin="" style="font-family:"><span style="color:black">)و سپس براساس نوع محلول شوینده به صورت تصادفی به 2 زیر گروه نرمال سالین و شوینده هیپوکلریت سدیم 2.5% تقسیم و به مدت 5 دقیقه در هرکدام غوطه ور شدند(8=</span></span></span></span><span dir="LTR" style="font-size:11.0pt"><span style="line-height:115%"><span style="color:black">n</span></span></span><span lang="FA" style="font-size:11.0pt"><span style="line-height:115%"><span b="" nazanin="" style="font-family:"><span style="color:black">).تست </span></span></span></span><span dir="LTR" style="font-size:11.0pt"><span style="line-height:115%"><span style="color:black">cyclic fatigue</span></span></span><span lang="FA" style="font-size:11.0pt"><span style="line-height:115%"><span b="" nazanin="" style="font-family:"><span style="color:black"> با کانال مصنوعی دربلوک‌ استنلس استیل باشعاع کرو 5 میلیمتر و زاویه انحنای 60 درجه&nbsp; انجام شد.فایل‌ها مطابق بادستورکارخانه سازنده براساس</span></span></span></span><span dir="LTR" style="font-size:11.0pt"><span style="line-height:115%"><span style="color:black">Torque(1.5Neolix</span></span></span><span lang="FA" style="font-size:11.0pt"><span style="line-height:115%"><span b="" nazanin="" style="font-family:"><span style="color:black">= و </span></span></span></span><span dir="LTR" style="font-size:11.0pt"><span style="line-height:115%"><span style="color:black">X Pro Gold=2.5</span></span></span><span lang="FA" style="font-size:11.0pt"><span style="line-height:115%"><span b="" nazanin="" style="font-family:"><span style="color:black">)وسرعت(350)توصیه.شده،درداخل(کانال‌مصنوعی)استفاده شدند تا زمانی که شکستند.زمان شکستگی به ثانیه&nbsp;&nbsp; وتعداد چرخش تا شکست(</span></span></span></span><span dir="LTR" style="font-size:11.0pt"><span style="line-height:115%"><span style="color:black">NCF</span></span></span><span lang="FA" style="font-size:11.0pt"><span style="line-height:115%"><span b="" nazanin="" style="font-family:"><span style="color:black">)،محاسبه شد.طول قطعه شکسته در هر دو فایل محاسبه شد.در انتها سطوح شکسته تعداد 2 نمونه از هر گروه به صورت تصادفی با میکروسکوپ الکترونی بررسی شدند. </span></span></span></span></span></span></span></span></span></span><br> <span style="font-size:12pt"><span style="line-height:115%"><span style="text-autospace:none"><span style="direction:rtl"><span style="unicode-bidi:embed"><span new="" roman="" style="font-family:" times=""><b><span b="" lang="AR-SA" nazanin="" style="font-family:"><span style="color:black">یافته ها</span></span></b><span b="" lang="AR-SA" nazanin="" style="font-family:"><span style="color:black">: </span></span>&nbsp;<span lang="FA" style="font-size:11.0pt"><span style="line-height:115%"><span b="" nazanin="" style="font-family:"><span style="color:black">محیط نگهداری بر تعداد چرخش فایل قبل از شکست فایلهای </span></span></span></span><span dir="LTR" style="font-size:11.0pt"><span style="line-height:115%"><span style="color:black">X Pro Gold</span></span></span><span lang="FA" style="font-size:11.0pt"><span style="line-height:115%"><span b="" nazanin="" style="font-family:"><span style="color:black"> و </span></span></span></span><span dir="LTR" style="font-size:11.0pt"><span style="line-height:115%"><span style="color:black">Neolix</span></span></span><span lang="FA" style="font-size:11.0pt"><span style="line-height:115%"><span b="" nazanin="" style="font-family:"><span style="color:black">تاثیرگذار نبود(0/654=</span></span></span></span><span dir="LTR" style="font-size:11.0pt"><span style="line-height:115%"><span style="color:black">p</span></span></span><span lang="FA" style="font-size:11.0pt"><span style="line-height:115%"><span b="" nazanin="" style="font-family:"><span style="color:black">) اما نوع فایل بر مقاومت چرخشی فایل های روتاری </span></span></span></span><span dir="LTR" style="font-size:11.0pt"><span style="line-height:115%"><span style="color:black">X Pro Gold</span></span></span><span lang="FA" style="font-size:11.0pt"><span style="line-height:115%"><span b="" nazanin="" style="font-family:"><span style="color:black">و </span></span></span></span><span dir="LTR" style="font-size:11.0pt"><span style="line-height:115%"><span style="color:black">Neolix</span></span></span><span lang="FA" style="font-size:11.0pt"><span style="line-height:115%"><span b="" nazanin="" style="font-family:"><span style="color:black"> تاثیر گذار بود.(0/001</span></span></span></span><span lang="FA" style="font-size:11.0pt"><span style="line-height:115%"><span style="color:black">></span></span></span><span dir="LTR" style="font-size:11.0pt"><span style="line-height:115%"><span style="color:black">P</span></span></span><span lang="FA" style="font-size:11.0pt"><span style="line-height:115%"><span style="color:black">)</span></span></span><span lang="FA" style="font-size:11.0pt"><span style="line-height:115%"><span b="" nazanin="" style="font-family:"><span style="color:black"></span></span></span></span></span></span></span></span></span></span><br> <span style="font-size:12pt"><span style="line-height:115%"><span style="text-autospace:none"><span style="direction:rtl"><span style="unicode-bidi:embed"><span new="" roman="" style="font-family:" times=""><b><span b="" lang="AR-SA" nazanin="" style="font-family:"><span style="color:black">ﻧﺘﻴﺠﻪ ﮔﻴﺮی</span></span></b><span b="" lang="AR-SA" nazanin="" style="font-family:"><span style="color:black">:</span></span>&nbsp; <span lang="AR-SA" style="font-size:11.0pt"><span style="line-height:115%"><span b="" nazanin="" style="font-family:"><span style="color:black">نتایج این مطالعه نشان داد که محیط نگهداری و تقابل نوع فایل و محیط نگهداری بر تعداد چرخش و مدت زمان قبل از شکستگی فایلهای</span></span></span></span><span dir="LTR" style="font-size:11.0pt"><span style="line-height:115%"><span bold="" new="" roman="" style="font-family:" times=""><span style="color:black">X Pro Gold</span></span></span></span><span lang="AR-SA" style="font-size:11.0pt"><span style="line-height:115%"><span b="" nazanin="" style="font-family:"><span style="color:black">و </span></span></span></span><span dir="LTR" style="font-size:11.0pt"><span style="line-height:115%"><span bold="" new="" roman="" style="font-family:" times=""><span style="color:black">Neolix</span></span></span></span><span lang="AR-SA" style="font-size:11.0pt"><span style="line-height:115%"><span b="" nazanin="" style="font-family:"><span style="color:black">تاثیرگذار نمی باشد &nbsp;ولی نوع فایل موثر بوده و فایل </span></span></span></span><span dir="LTR" style="font-size:11.0pt"><span style="line-height:115%"><span style="color:black">Neolix</span></span></span><span lang="AR-SA" style="font-size:11.0pt"><span style="line-height:115%"><span b="" nazanin="" style="font-family:"><span style="color:black">&nbsp; تاثیر گذار نمی باشد ولی نوع فایل موثر بوده و فایل </span></span></span></span><span dir="LTR" style="font-size:11.0pt"><span style="line-height:115%"><span calibri="" style="font-family:"><span style="color:black">Neolix </span></span></span></span><span lang="FA" style="font-size:11.0pt"><span style="line-height:115%"><span b="" nazanin="" style="font-family:"><span style="color:black">&nbsp;از فایل عملکرد بهتری دارد.</span></span></span></span></span></span></span></span></span></span><br> <br> <span style="font-size:12pt"><span style="line-height:115%"><span style="text-autospace:none"><span style="direction:rtl"><span style="unicode-bidi:embed"><span new="" roman="" style="font-family:" times=""><span lang="X-NONE" dir="LTR" style="color:black"></span></span></span></span></span></span></span><br> &nbsp; <span style="font-size:12pt"><span new="" roman="" style="font-family:" times=""><b><span style="font-size:10.0pt">Background and Aim:</span></b> &nbsp;<span style="font-size:10.0pt">NiTi instruments have a high risk of separation due to torsional or flexural fatigue (cyclic fatigue). Chemomechanical preparation and chemical disinfection causes the corrosion of endodontic instruments that may weaken the fracture resistance of the instruments. This study is to evaluate the two nickle-titanium systems&rsquo; (Neolix and X Pro Gold) resistance to fracture after immersion in sodium hypochlorite.</span></span></span><br> <span style="font-size:12pt"><span new="" roman="" style="font-family:" times=""><b><span style="font-size:10.0pt">Materials and methods:</span></b><span style="font-size:10.0pt"> In this in vitro study, 32rotary files of Neolix file(Neolix,France) and X Pro Gold file (Easyinsmile,China),in size of 25 and 25 mm long were examined. The samples were divided into 2 groups of Neolix and X Pro Gold files(n=16). Then each group was divided into 2 subgroups: 2/5% sodium hypochlorite and normal saline based on the type of irrigation solution (n = 8). Cyclic fatigue test was performed with artificial canals in stainless steel blocks with a 60 &deg; angle of curvature and a radius of 5 mm.&nbsp; The files used inside the artificial canals according to the manufacturer&#39;s instructions based on the torque (Neolix=1.5 N.cm and X Pro Gold=2.5 N.cm) and recommended speed (350 rpm), until they broke. Fracture time in seconds and number of cycles to failure (NCF) were calculated. The length of the broken piece was calculated in both files. Finally, the fractured surfaces of 2 samples from each group were randomly examined via scanning electron microscopy. SPSS software version 26 and two-way ANOVA test were used to analyze the data (p <0.05).</span></span></span><br> <span style="font-size:12pt"><span new="" roman="" style="font-family:" times=""><b><span style="font-size:10.0pt">Results:</span></b><span style="font-size:10.0pt"> The average length of the broken piece was 4/95 mm in X Pro Gold file and 2/75 mm in Neolix file. Storing environment</span><span lang="EN" style="font-size:10.0pt"> (p = 0.654) did not affect the number of cycles before fracture of the X Pro Gold and Neolix files,but file type (p<0.001) had an impact on it.</span></span></span><br> <span style="font-size:12pt"><span new="" roman="" style="font-family:" times=""><b><span style="font-size:10.0pt">Conclusion:</span></b><span style="font-size:10.0pt"> The results of this study showed that storing environment did not affect the number of cycles before fracture of X Pro Gold and Neolix files but file type affected them.Neolix file(NCF hypo=1098,NCF saline=1088) had a better performance than X Pro Gold file(NCF hypo=509 ,NCF saline=474).</span></span></span><br> &nbsp; مقاومت به شکست چرخشی, فایل روتاری,هیپوکلریت سدیم Sodium Hypochlorite, Cyclic Fatigue Resistance, Rotary File 17 26 http://jrds.ir/browse.php?a_code=A-10-1799-1&slc_lang=fa&sid=1 Solmaz Araghi سولماز عراقی solmaz8260@yahoo.com 100319475328460020536 100319475328460020536 No Endodontic department, dental material research center, dental school, islamic azad university of medical sciences, tehran, iran بخش اندودانتیکس دانشکده دندانپزشکی ، دانشگاه علوم پزشکی آزاد اسلامی تهران Abbas Delvarani عباس دلورانی pariskaghazloo@gmail.com> 100319475328460020537 100319475328460020537 No Endodontic department, dental material research center, dental school, islamic azad university of medical sciences, tehran, iran ارتودنتیست Faeze dehghan فایزه دهقان faeze.dh.963@gmail.com 100319475328460020538 0009-0001-7784-7360 No Dental Material Research Center, Tehran Medical Science, Islamic Azad University, Tehran,Iran دندانپزشک عمومی Parisa Kaghazloo پریسا کاغذلو pariskaghazloo@gmail.com> 100319475328460020539 100319475328460020539 Yes Dental Material Research Center, Tehran Medical Science, Islamic Azad University, Tehran,Iran دندانپزشک عمومی