بررسی استحکام باند برشی گلاس آیونومر بایواکتیو حاوی ذرات تیتانیوم و گلاس آیونومر معمولی به عاج دندانی درمان شده با دو روش لیزر er-yag و کانونشنال

زمینه و هدف: اخیراً، اضافه کردن نانو ذرات‌ به مواد ترمیمی و روش آماده سازی دندان با لیزر در مطالعات مختلفی جهت بررسی بهبود استحکام باند مورد توجه محققین قرار گرفته است. هدف از انجام این مطالعه بررسی استحکام باند برشی گلاس آیونومر بایواکتیو حاوی ذرات تیتانیوم و گلاس آیونومر معمولی با دو روش آماده سازی سطح با لیزر er-yag و کانونشنال بود.روش ﺑﺮر ﺳﯽ: در اﯾﻦ ﻣﻄﺎﻟﻌﻪ آزﻣﺎﯾ ﺸﮕﺎﻫﯽ، 64 دﻧﺪان ﭘﺮﻣﻮﻟﺮ ﺳﺎﻟﻢ ﮐ ﺸﯿﺪه ﺷﺪه ﺟﻤﻊ آوری ﺷﺪ. در روش ﮐﺎﻧﻮﻧ ﺸﻨﺎل، آﻣﺎده ﺳﺎزی ﻧﻤﻮﻧﻪﻫﺎ ﺑﻪ ﺻﻮرﺗﯽ اﻧﺠﺎم ﮔﺮدﯾﺪ ﮐﻪ ﺳﻄﻮﺣﯽ از ﻋﺎج ﺑﺎ ﻋﻤﻖ 0/5 ﻣﯿﻠﯽ ﻣﺘﺮ ﺑﺎ ﻓﺎ ﺻﻠﻪ 2 ﻣﯿﻠﯽ ﻣﺘﺮ از ﻣﺤﻞ اﺗﺼﺎل cej در رﯾ ﺸﻪ ﯾﺎ ﺗﺎج اﯾﺠﺎد ﺷﻮد. در ﮔﺮوه ﻟﯿﺰر، ﺑﻌﺪ از ﺗﺮاش دﻧﺪانﻫﺎ ﺳﻄﺢ ﻧﺎﺣﯿﻪ ﺑﺎ ﻟﯿﺰر er-yag ﻣﻮرد آﻣﺎده ﺳﺎزی ﻗﺮار ﮔﺮﻓﺖ. ﺳﭙﺲ در ﻗ ﺴﻤﺖ ﻣﯿﺎﻧﯽ ﺳﻄﺢ ﺑﺎﮐﺎل ﻣﻮﻟﺪ ا ﺳﺘﻮاﻧﻪای ﺑﺎ اﺑﻌﺎد 3/5 ﻣﯿﻠﯽ ﻣﺘﺮ ﻗﻄﺮ و ارﺗﻔﺎع 4 ﻣﯿﻠﯽ ﻣﺘﺮ ﮔﺬاﺷﺘﻪ و ﻫﺮ ﮔﺮوه ﺑﺎ ﮔﻼس آﯾﻨﻮﻣﺮﻫﺎی ﺧﺎص ﺧﻮد ﺳﺎﺧﺘﻪ ﺷﺪﻧﺪ. ﻧﻤﻮﻧﻪﻫﺎ ﺑﻪ روش ﺗﺼﺎدﻓﯽ ﺳﺎده در 8 ﮔﺮوه ﺗﻘﺴﯿﻢ ﺑﻨﺪی ﺷﺪﻧﺪ 8=a: n ﻟﯿﺰر، ﮔﻼس آﯾﻮﻧﻮﻣﺮ ﻣﻌﻤﻮﻟﯽ، ﻋﺎج ﺗﺎج / b ﻟﯿﺰر، ﮔﻼس آﯾﻮﻧﻮﻣﺮ ﺣﺎوی ﻧﺎﻧﻮ ذرات ﺗﯿﺘﺎﻧﯿﻮم، ﻋﺎج ﺗﺎج / c ﮐﺎﻧﻮﻧﺸﻨﺎل، ﮔﻼس آﯾﻮﻧﻮﻣﺮ ﻣﻌﻤﻮﻟﯽ، ﻋﺎج ﺗﺎج / d ﮐﺎﻧﻮﻧﺸﻨﺎل، ﮔﻼس آﯾﻮﻧﻮﻣﺮ ﺣﺎوی ﻧﺎﻧﻮ ذرات ﺗﯿﺘﺎﻧﯿﻮم، ﻋﺎج ﺗﺎج / e ﻟﯿﺰر، ﮔﻼس آﯾﻮﻧﻮﻣﺮ ﻣﻌﻤﻮﻟﯽ، ﻋﺎج رﯾﺸﻪ / f ﻟﯿﺰر، ﮔﻼس آﯾﻮﻧﻮﻣﺮ ﺣﺎوی ﻧﺎﻧﻮ ذرات ﺗﯿﺘﺎﻧﯿﻮم، ﻋﺎج رﯾﺸﻪ / g ﮐﺎﻧﻮﻧﺸﻨﺎل، ﮔﻼس آﯾﻮﻧﻮﻣﺮ ﻣﻌﻤﻮﻟﯽ، ﻋﺎج رﯾﺸﻪ / h ﮐﺎﻧﻮﺷﻨﺎل، ﮔﻼس آﯾﻮﻧﻮﻣﺮ ﺣﺎوی ﻧﺎﻧﻮ ذرات ﺗﯿﺘﺎﻧﯿﻮم، ﻋﺎج رﯾﺸﻪ و در ﻧﻬﺎﯾﺖ اﺳﺘﺤﮑﺎم ﺑﺎﻧﺪ ﺑﺮﺷﯽ در universal testing machine ﺑﺎ ﺳﺮﻋﺖ 1 ﻣﯿﻠﯽ ﻣﺘﺮ در دﻗﯿﻘﻪ اﻧﺪازه ﮔﯿﺮی ﺷﺪ. ﺟﻬﺖ آﻧﺎﻟﯿﺰ دادهﻫﺎ، ﺑﻪ ﻣﻨﻈﻮر ﺑﺮرﺳﯽ اﺛﺮ ﻫﺮ ﻣﺘﻐﯿﺮ و اﺛﺮ ﻣﺘﻘﺎﺑﻞ آنﻫﺎ روی اﺳﺘﺤﮑﺎم ﺑﺎﻧﺪ ﺑﺮﺷﯽ از آزﻣﻮن two-way anova اﺳﺘﻔﺎده ﺷﺪ، و ﺟﻬﺖ ﻣﻘﺎﯾﺴﻪ دو ﺑﻪ دو ﮔﺮوهﻫﺎ از آزﻣﻮن tukey اﺳﺘﻔﺎده ﺷﺪ.ﯾﺎﻓﺘﻪﻫﺎ: ﺗﻔﺎوت آﻣﺎری ﻣﻌﻨﯽدار ﺗﻨﻬﺎ ﺑﯿﻦ ﮔﺮوهﻫﺎی b ﺑﺎ p=0/002 c و p=0/007 e و p=0/001 g و p=0/01 h وﺟﻮد داﺷﺖ. ﺑﯿﺸﺘﺮﯾﻦ اﺳﺘﺤﮑﺎم ﺑﺎﻧﺪ ﻣﺮﺑﻮط ﺑﻪ ﮔﺮوه b ﻟﯿﺰر، ﮔﻼس آﯾﻮﻧﻮﻣﺮ ﺣﺎوی ﻧﺎﻧﻮ ذرات ﺗﯿﺘﺎﻧﯿﻮم، ﻋﺎج ﺗﺎج و ﮐﻤﺘﺮﯾﻦ ﻣﻘﺪار ﻣﺮﺑﻮط ﺑﻪ ﮔﺮوه g ﮐﺎﻧﻮﻧﺸﻨﺎل، ﮔﻼس آﯾﻮﻧﻮﻣﺮ ﻣﻌﻤﻮﻟﯽ، ﻋﺎج رﯾﺸﻪ ﺑﻮد. ﻧﺘﯿﺠﻪ ﮔﯿﺮی: ﻫﺮ ﺳﻪ ﻋﺎﻣﻞ ﻟﯿﺰر er-yag، ﮔﻼس آﯾﻮﻧﻮﻣﺮ ﺣﺎوی ﻧﺎﻧﻮ ذرات ﺗﯿﺘﺎﻧﯿﻮم و ﻋﺎج ﺗﺎج در اﻓﺰاﯾﺶ اﺳﺘﺤﮑﺎم ﺑﺎﻧﺪ ﺗﺄﺛﯿﺮ ﻣﺜﺒﺘﯽ داﺷﺘﻪاﻧﺪ.

evaluation of shear bond strength of bioactive glass ionomer containing titanium and conventional glass ionomer particles to dentin treated with er-yag laser and conventional methods

background and aims: recently, the addition of nanoparticles into the restorative materials and tooth preparation by laser for improving the bond strength have been concidered by researchers. the aim of this study was to investigate the shear bond strength of the bioactive glass ionomer containing titanium particles and a conventional glass ionomer with two surface treatments by er-yag laser and conventional methods.materials and methods: in this in-vitro study, 64 sound extracted premolars were collected. for conventional method, the specimens were prepared in such a way that dentin surfaces with a depth of 0.5 millimeter created at distance of 2 mm from the joint of cej at the root or crown.  in the laser group, after preparing the teeth, the surface area was prepared by er-yag laser. then, in the middle part of the buccal surface, a cylindrical mold with dimensions of 3.5 mm in diameter and 4 mm in height was placed and for each group was filled with its own glass ionomers. the  specimens  were divided into 8 groups by simple random sampling n=8 : a laser, conventional glass ionomer, coronal dentin / b laser, glass ionomer containing titanium nanoparticle, coronal dentin /c conventional, conventional glass ionomer, coronal dentin / d conventional, glass ionomer containing titanium nanoparticle, coronal dentin / e laser, conventional glass ionomer, root dentin / f laser, glass ionomer containing titanium nanoparticle, root dentin / g conventional, conventional glass ionomer, root dentin / h conventional, glass ionomer containing titanium nanoparticle, coronal dentin . finally, the shear bong strength by a universal testing machine was measured at a cross-head speed of 1 mm/min. for data analysis, two-way anova test was used to evaluate the effect of each variable and their interaction on the shear bond strength and tukey test was used to compare the two groups.results: there was significant difference only between groups b with c p=0.002 , e p=0.007 , g p=0.001 and h p=0.01 . the highest bond strength was found for group b laser, glass ionomer containing titanium nanoparticle, coronal dentin and the lowest bond strength for group g conventional, conventional glass ionomer, root dentin .conclusion: all three factors of er-yag laser, glass ionomer containing titanium nanoparticle and coronal dentin had a positive effect on the improvement of the bond strength.