{"title":"Radiopaque acrylic adhesive resin with bismuth subcarbonate-poly(methyl methacrylate) composite","authors":"N. Hisamatsu, Masayuki Sueyoshi, Mitsuo Nakamura","doi":"10.47416/apjod.22-0289","DOIUrl":"https://doi.org/10.47416/apjod.22-0289","url":null,"abstract":"Purpose: A radiopaque self-polymerizing adhesive resin was prepared by incorporating bismuth subcarbonate-poly(methyl methacrylate) prepolymerized composite (BS-PMMA) into an acrylic resin. The purpose of this study was to evaluate the radiopacity of prepared resins. Methods: As a radiopaque component, a composite containing 50% bismuth subcarbonate was used, and other metal compounds were adopted as controls. They were added to finely pulverized PMMA. Specimens were prepared from the powders, methyl methacrylate (MMA) monomer with 5% 4-methacryloyloxyethyl trimellitate anhydride (4-META) and tri- n -butylborane derivative (TBB) by mixing. Radiographs of the specimens were taken together with tooth slices and aluminum step wedges. The density of the specimens was determined with a densitometer and was expressed in terms of the equivalent thickness of aluminum per 2.0 mm unit thickness of specimen. Results: The radiopacity value of BS-PMMA-based specimen was 3.7 mm Al / 2.0 mm specimen, which was nearly the same value as enamel (3.7) and exceeded the values of dentin (2.0). Conclusion: BS-PMMA composite and bismuth compounds are useful as a radiopaque additive for the acrylic resin. (Asian","PeriodicalId":433454,"journal":{"name":"Asian Pacific Journal of Dentistry","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126934035","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}