Aftab Ahmed Khan, Asaad Javaid Mirza.
Preparation Of A Radiopaque Fissure Sealant By Incorporating Higher Fractions Of Tin-methacrylate And Measuring Their Radiopacity Using X-ray Microtomography.
J Pak Dent Assoc Jan ;22(2):113-8.

OBJECTIVE: Fissure sealants are generally radiolucent and are not clearly visible radiographically. Many attempts have been made to make them radiopaque in accordance with ISO standard – 4049. The inclusion of heavy metals and glasses make the sealants radiopaque but these heavy metals are used for radiopacity to some weight percent. This study was performed to develop fissure sealants with higher fractions up to 9.5gm of tin-methacrylat in which tin was chemically incorporated into methacrylate polymer and measuring their Linear attenuation coefficient (LAC) with the help of X-ray micro-tomography. METHODOLOGY: The control material was made by mixing 10.0 gm Ethylene Glycol Dimethacrylate (EGDMA), 0.05 gm Camphorquinone (CQ) and 0.05 ml N, N-Dimethyl-P-Toluidine (DMPT) into an amber-colored bottle. Four types of experimental sealants were produced by increasing the weight of Tin-Methacrylate (SnM) and reducing the weight of EDGMA. Mixtures of the same ingredients were prepared in the same manner with increasing weight % of SnM as 5.0, 7.5, 8.5, and 9.5 gm and decreasing quantity of EGDMA as 5.0, 2.5, 1.5 and 0.5 gm respectively. RESULTS: Results show that the increasing weight of SnM increased radiopacity up to 8.5gm. The experimental sealant containing 9.5 gm of SnM caused unworkable consistency of the mix. CONCLUSION: Under the conditions of this study, best combination of workable mix and radiopacity was obtained when the weight of SnM was increased to 8.5 gm.

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