The Journal of Shahid Sadoughi University of Medical Sciences
مجله علمي پژوهشي دانشگاه علوم پزشكي شهید صدوقی يزد
JSSU
Medical Sciences
http://jssu.ssu.ac.ir
20
journal20
2228-5741
2228-5733
fa
jalali
1403
7
1
gregorian
2024
10
1
32
7
online
1
fulltext
fa
ارزیابی اثر زمان اچینگ بر استحکام باند برشی براکتهای ارتودنسی باند شده با کامپوزیت خود باند شونده: یک مطالعه آزمایشگاهی
Evaluation of Etching Time Effect on Shear Bond Strength of Orthodontic Brackets Bonded with Self-Adhesive Composite: An in-Vitro Study
دندانپزشکی
Dental
پژوهشي
Original article
<div style="text-align: justify;"><span style="font-size:11pt"><span style="line-height:18.0pt"><span style="direction:rtl"><span style="unicode-bidi:embed"><span calibri="" style="font-family:"><b><span lang="AR-SA" style="font-size:12.0pt"><span b="" nazanin="" style="font-family:">مقدمه:</span></span></b> <span lang="FA" style="font-size:12.0pt"><span b="" nazanin="" style="font-family:">اچ دقیق سطح دندان عامل مهمی در استحکام باند براکت</span></span><span dir="LTR" lang="FA" style="font-size:12.0pt"><span b="" nazanin="" style="font-family:">‎</span></span><span lang="FA" style="font-size:12.0pt"><span b="" nazanin="" style="font-family:">های ارتودنسی میباشد. تحقیق حاضر با هدف تعیین اثر زمان</span></span><span dir="LTR" lang="FA" style="font-size:12.0pt"><span b="" nazanin="" style="font-family:">‎</span></span><span lang="FA" style="font-size:12.0pt"><span b="" nazanin="" style="font-family:">های مختلف کاربرد اسید اچ بر استحکام باند برشی براکتهای فلزی در شرایط آزمایشگاهی انجام شد</span></span><span dir="LTR" style="font-size:10.0pt"><span new="" roman="" style="font-family:" times="">.</span></span><span lang="FA" style="font-size:12.0pt"><span style="font-family:"B Nazanin""></span></span></span></span></span></span></span><br>
<span style="font-size:11pt"><span style="line-height:18.0pt"><span style="direction:rtl"><span style="unicode-bidi:embed"><span calibri="" style="font-family:"><b><span lang="AR-SA" style="font-size:12.0pt"><span b="" nazanin="" style="font-family:">روش بررسی:</span></span></b> <span lang="FA" style="font-size:12.0pt"><span b="" nazanin="" style="font-family:">در این مطالعه ۶۰ دندان پرمولر سالم انتخاب شد. نمونه</span></span><span dir="LTR" lang="FA" style="font-size:12.0pt"><span b="" nazanin="" style="font-family:">‎</span></span><span lang="FA" style="font-size:12.0pt"><span b="" nazanin="" style="font-family:">ها براساس زمان</span></span><span dir="LTR" lang="FA" style="font-size:12.0pt"><span b="" nazanin="" style="font-family:">‎</span></span><span lang="FA" style="font-size:12.0pt"><span b="" nazanin="" style="font-family:">های اچ ۲۰، ۲۵، ۳۰ و ۳۵ ثانیه به چهار گروه تقسیم شدند. سطح دندان</span></span><span dir="LTR" lang="FA" style="font-size:12.0pt"><span b="" nazanin="" style="font-family:">‎</span></span><span lang="FA" style="font-size:12.0pt"><span b="" nazanin="" style="font-family:">ها بر اساس زمان</span></span><span dir="LTR" lang="FA" style="font-size:12.0pt"><span b="" nazanin="" style="font-family:">‎</span></span><span lang="FA" style="font-size:12.0pt"><span b="" nazanin="" style="font-family:">های مشخص شده، اچ (اسید فسفریک ۳۷%) شده و براکتها توسط کامپوزیت</span></span><span dir="LTR" new="" roman="" style="font-family:" times=""> Gc ortho connect </span><span style="font-size:12.0pt"><span b="" nazanin="" style="font-family:"> به سطح مینا باند شدند. میزان استحکام باند برشی براکتها با دستگاه</span></span><span dir="LTR" new="" roman="" style="font-family:" times=""> UTM </span><span lang="FA" style="font-size:12.0pt"><span b="" nazanin="" style="font-family:">اندازهگیری شد. میزان چسب (</span></span><span dir="LTR" new="" roman="" style="font-family:" times="">Adhesive</span><span lang="FA" style="font-size:12.0pt"><span b="" nazanin="" style="font-family:">) باقیمانده توسط استریومیکروسکوپ مشاهده گردید. تغییرات سطحی مینای دندان نیز بعد از دباندینگ توسط</span></span><span dir="LTR" new="" roman="" style="font-family:" times=""> SEM </span><span lang="FA" style="font-size:12.0pt"><span b="" nazanin="" style="font-family:">مشاهده شد. نتایج مرتبط با استحکام باند برشی با آزمون آماری</span></span><span dir="LTR" new="" roman="" style="font-family:" times="">ANOVA </span><span lang="FA" style="font-size:12.0pt"><span b="" nazanin="" style="font-family:"> یکطرفه و با استفاده از نرم</span></span><span dir="LTR" lang="FA" style="font-size:12.0pt"><span b="" nazanin="" style="font-family:">‎</span></span><span lang="FA" style="font-size:12.0pt"><span b="" nazanin="" style="font-family:">افزار </span></span><span dir="LTR" new="" roman="" style="font-family:" times="">SPSS version 16</span><span style="font-size:12.0pt"><span b="" nazanin="" style="font-family:"> مورد تجزیه و تحلیل قرار گرفت. برای بررسی فراوانی شاخص </span></span><span dir="LTR" new="" roman="" style="font-family:" times="">ARI</span><span style="font-size:12.0pt"><span b="" nazanin="" style="font-family:"> نیز از آزمون ناپارامتریک کروسکال والیس(</span></span><span dir="LTR" new="" roman="" style="font-family:" times="">Wallis-Kruskal</span><span lang="FA" style="font-size:12.0pt"><span b="" nazanin="" style="font-family:">) استفاده شد.</span></span><span lang="FA" style="font-size:12.0pt"><span style="font-family:"B Nazanin""></span></span></span></span></span></span></span><br>
<span style="font-size:11pt"><span style="line-height:18.0pt"><span style="direction:rtl"><span style="unicode-bidi:embed"><span calibri="" style="font-family:"><b><span lang="AR-SA" style="font-size:12.0pt"><span b="" nazanin="" style="font-family:">نتایج:</span></span></b><span lang="FA" style="font-size:12.0pt"><span b="" nazanin="" style="font-family:"> بیشترین میانگین استحکام باند در زمان اچ ۲۵ ثانیه و کمترین آن در زمان اچ ۳۰ ثانیه مشاهده شد. با اینحال، تفاوت معنیداری در استحکام باند برشی در بین گروهها مشاهده نشد (</span></span><span dir="LTR" style="font-size:10.0pt"><span new="" roman="" style="font-family:" times="">p=0.186</span></span><span lang="FA" style="font-size:12.0pt"><span b="" nazanin="" style="font-family:">). بیشترین میزان </span></span><span dir="LTR" style="font-size:10.0pt"><span new="" roman="" style="font-family:" times="">ARI</span></span><span style="font-size:12.0pt"><span b="" nazanin="" style="font-family:"> در زمان اچ ۳۵ ثانیه و کمترین آن در زمان اچ ۲۰ ثانیه مشاهده شد. در میزان </span></span><span dir="LTR" style="font-size:10.0pt"><span new="" roman="" style="font-family:" times="">ARI</span></span><span style="font-size:12.0pt"><span b="" nazanin="" style="font-family:"> نیز در گروه</span></span><span dir="LTR" lang="FA" style="font-size:12.0pt"><span b="" nazanin="" style="font-family:">‎</span></span><span lang="FA" style="font-size:12.0pt"><span b="" nazanin="" style="font-family:">های مختلف تفاوت آماری معنیداری مشاهده نشد. در تصاویر بهدست آمده از </span></span><span dir="LTR" style="font-size:10.0pt"><span new="" roman="" style="font-family:" times="">SEM</span></span><span lang="FA" style="font-size:12.0pt"><span b="" nazanin="" style="font-family:">، خشونت سطح مینا در زمان ۲۰ ثانیه بیشتر از سایر گروه</span></span><span dir="LTR" lang="FA" style="font-size:12.0pt"><span b="" nazanin="" style="font-family:">‎</span></span><span lang="FA" style="font-size:12.0pt"><span b="" nazanin="" style="font-family:">ها بود.</span></span> <span lang="FA" style="font-size:12.0pt"><span style="font-family:"B Nazanin""></span></span></span></span></span></span></span><br>
<span style="font-size:11pt"><span style="line-height:18.0pt"><span style="direction:rtl"><span style="unicode-bidi:embed"><span calibri="" style="font-family:"><b><span lang="AR-SA" style="font-size:12.0pt"><span b="" nazanin="" style="font-family:">نتیجهگیری:</span></span></b> <span lang="FA" style="font-size:12.0pt"><span b="" nazanin="" style="font-family:">نتایج نشان داد میزان استحکام باند برشی در زمان</span></span><span dir="LTR" lang="FA" style="font-size:12.0pt"><span b="" nazanin="" style="font-family:">‎</span></span><span lang="FA" style="font-size:12.0pt"><span b="" nazanin="" style="font-family:">های مختلف اسید اچ تفاوت معنیداری ندارد. بنابراین باند براکت ارتودنسی می</span></span><span dir="LTR" lang="FA" style="font-size:12.0pt"><span b="" nazanin="" style="font-family:">‎</span></span><span lang="FA" style="font-size:12.0pt"><span b="" nazanin="" style="font-family:">تواند در زمانهای کمتر اسید اچ صورت پذیرد.</span></span></span></span></span></span></span><br>
</div>
<div style="text-align: justify;"><span style="font-size:11pt"><span style="line-height:17.0pt"><span calibri="" style="font-family:"><b><span new="" roman="" style="font-family:" times="">Introduction:</span></b> <span new="" roman="" style="font-family:" times="">Precise acid etching of the tooth surface is a significant factor in the strength of the bracket bond. The current study aimed to determine the effect of different application times of acid etching on the shear bond strength of metallic orthodontic brackets under controlled laboratory conditions.</span><span style="font-family:"Times New Roman",serif"></span></span></span></span><br>
<span style="font-size:11pt"><span style="line-height:17.0pt"><span calibri="" style="font-family:"><b><span new="" roman="" style="font-family:" times="">Methods:</span></b> <span new="" roman="" style="font-family:" times="">Sixty intact premolar teeth were selected for this in-vitro study. The samples were divided into four groups based on the different acid etching times: 20, 25, 30, and 35 seconds. The teeth surfaces were etched with 37% phosphoric acid according to the specified times, and brackets were bonded </span><span new="" roman="" style="font-family:" times="">to the enamel surface </span><span new="" roman="" style="font-family:" times="">using GC Ortho connect composite. Shear bond strength values of the brackets was measured using a Universal Testing Machine. The amount of Adhesive Remnant Index was also observed using a stereomicroscope. Additionally, the surface roughness of the tooth enamel after bracket bonding was examined using SEM.</span><span new="" roman="" style="font-family:" times=""> The results related to shear bond strength were analyzed with one-way ANOVA statistical test and using SPSS version 16 software. The non-parametric Kruskal Wallis (Wallis-Kruskal) test was also used to check the frequency of ARI index.</span></span></span></span><br>
<span style="font-size:11pt"><span style="line-height:17.0pt"><span calibri="" style="font-family:"><b><span new="" roman="" style="font-family:" times="">Results:</span></b><b> </b><span new="" roman="" style="font-family:" times="">The highest shear bond strength was observed at 25 seconds, and the lowest at 30 seconds. However, there was no significant difference in the shear bond strength of brackets was observed among the four groups (p=0.186). The highest ARI score was observed at 35 seconds, and the lowest at 20 seconds. No statistically significant difference </span><span new="" roman="" style="font-family:" times="">was observed</span><span new="" roman="" style="font-family:" times=""> in the ARI scores in different groups. SEM images revealed that the enamel surface porosity was highest at 20 seconds.</span><span style="font-family:"Times New Roman",serif"></span></span></span></span><br>
<span style="font-size:11pt"><span style="line-height:17.0pt"><span calibri="" style="font-family:"><b><span new="" roman="" style="font-family:" times="">Conclusion:</span></b><b> </b><span new="" roman="" style="font-family:" times="">The results indicate that the shear bond strength and ARI at different acid etching times do not significantly differ. Therefore, orthodontic bracket bonding can be performed with less acid etching time.</span></span></span></span><br>
</div>
اسید اچ, براکت, استحکام برشی
Acid Etching, Orthodontic Brackets, Shear Strength.
8008
8018
http://jssu.ssu.ac.ir/browse.php?a_code=A-10-5355-1&slc_lang=fa&sid=1
Masomeh
Esmaily
معصومه
اسمعیلی
M.esmaily@abzums.ac.ir