مروري ﺑﺮ ﮐﺎﻣﭙﻮزﯾﺖ ﻫﺎي ﻣﺘﺎﮐﺮﯾﻼت و ﺳﯿﻠﻮران ﺑﯿﺲ و ﻋﻮاﻣﻞ ﻣﻮﺛﺮ ﺑﺮ رﯾﺰ ﻧﺸﺖ آن ها

A Review of Silorane and Methacrylate Based Composites and Effective Factors on Microleakage of them

يكي از معايب كامپوزيت رزين هاي امروزي، انقباض ناشي از پليمريزاسيون و ايجاد ريزنشت مي باشد. اين انقباض مي تواند باعث حساسيت دندان، رنگ گرفتگي حاشيه مارجين ها و پوسيدگي ثانويه شود. هدف از اين مطالعه، مرور عوامل موثر بر ميزان ريزنشت كامپوزيت هاي بيس متاكريلات و سيلوران و مقايسه آن ها با يكديگر مي باشد. در اين راستا تاثير تكنيك پركردن حفره (روش لايت كيورينگ) و اثر شيارهاي گيردار ارزيابي مي گردد.اين مطالعه مروري، با جستجو در منابع كتابخانه اي و پايگاهPub Med ، ,ISI of Science Google Scholar و با استفاده ازكليد واژه هايMicroleakage, Siloran-Based Composite, Methacrylate-Based Composite, Retentive Groove , Light Curing Technique از سال 1984 به بعد جمع آوري و تدوين گرديد. با وجود اين كه هنوز به طور قاطع مشخص نشده است كه كداميك از روش هاي قرار دهي در تكنيك لايه اي (Oblique ,vertical, split) مناسب تر است، به نظر مي رسد روش لايه اي نسبت به روش توده اي مزايايي دارد كه مي تواند در كاهش انقباض ناشي از پليمريزاسيون و ريزنشت ناشي از آن موثر باشد. هم چنين مي توان نتيجه گرفت كامپوزيت هاي با بيس سيلوران، ريزنشت كمتري دارند، اما عواملي چون نوع حفره، وسعت حفره، فاصله از CEJ، و نوع سيستم باندينگ سيلوران، نيز در ميران ريزنشت آن ها دخيل هستند. وجود شيارهاي گيردار در حفرات مفيد به نظر مي رسند زيرا كه باعث افزايش ناحيه اتصال و گير مكانيكي و هم چنين كاهش انقباض مارجينال ناشي از پليمريزاسيون و ريزنشت ناشي از آن مي شود.

Introduction: An important disadvantage of current dental resin composites is their polymerization shrinkage and production of microleakage. This shrinkage can cause tooth sensitivity, marginal discoloration, and secondary caries. The objective of this study was to review the effective factors on microleakage of methacrylate and silorane composites and compare them with each other. This reviewed article was compiled and searched on library sources and Google scholar, Pubmed, ISI of science database, using the key words “Microleakage, Siloran-Based Composite, Methacrylate-Based Composite, Retentive Groove, Light Curing Technique,” from 1984 -2019. Although it is not yet definitely clear, which methods of layering techniques (oblique, vertical, split) are more suitable, it seems that the layering technique has advantage over the bulkythat can effective in decreasing the shrinkage caused by polymerization and the resulting microlaekage. It can also be concluded that silorane base composites have less shrinkage, but some factors such as cavity type, cavity extent, cavity margin distance to CEJ, type of silorane base bonding system are also involves in their microleakage. It seems the presence of retention grooves in the cavities seems useful, because it increases the bonding area and mechanical retention as well as decreases the marginal shrinkage due to polymerization and the resulting microleakage. Conclusion: Finally, it can be said that microleakage cannot be stopped completely, and more studies, especially clinical studies, should be conducted to show the effects of these cases clinically.