{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,21]],"date-time":"2025-10-21T14:34:53Z","timestamp":1761057293708},"reference-count":28,"publisher":"Wiley","issue":"4","license":[{"start":{"date-parts":[[2001,12,24]],"date-time":"2001-12-24T00:00:00Z","timestamp":1009152000000},"content-version":"vor","delay-in-days":541,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Int Endodontic J"],"published-print":{"date-parts":[[2000,7]]},"abstract":"<jats:sec><jats:title>Abstract<\/jats:title><\/jats:sec><jats:sec><jats:title>Aim<\/jats:title><jats:p>This study compared the radiopacity of tetracalcium phosphate (TTCP) and 11 root\u2010end filling materials relative to human dentine.<\/jats:p><\/jats:sec><jats:sec><jats:title>Methodology<\/jats:title><jats:p>Specimens of 2\u00a0mm thickness and a graduated aluminium stepwedge were placed on dental X\u2010ray films and exposed to an X\u2010ray beam. The optical densities of the specimens and aluminium steps were measured. The optical densities of the specimens were correlated to the equivalent thickness of aluminium with a regression analysis equation. The equation was used to calculate the equivalent aluminium thickness of each of the specimens.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>Nine of the materials were found to be of acceptable radiopacity (at least 2\u00a0mm Al more radiopaque than dentine). TCCP and two of the glass\u2010ionomer compounds were found to have insufficient radiopacity to be radiographically distinguishable from human dentine.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusions<\/jats:title><jats:p>All the materials were found to be distinguishable radiographically from dentine, except for Vitrebond, TTCP and Ketac\u2010Fil. Amalgam was the most radiopaque material and Ketac\u2010Fil was the least radiopaque material tested.<\/jats:p><\/jats:sec>","DOI":"10.1046\/j.1365-2591.2000.00281.x","type":"journal-article","created":{"date-parts":[[2003,3,12]],"date-time":"2003-03-12T00:49:30Z","timestamp":1047430170000},"page":"311-315","update-policy":"http:\/\/dx.doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":31,"title":["Comparative radiopacity of tetracalcium phosphate and other root\u2010end filling materials"],"prefix":"10.1111","volume":"33","author":[{"given":"C. D.","family":"Laghios","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"B. W.","family":"Benson","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"J. L.","family":"Gutmann","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"C. 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