title: [Retrograde obturation with MTA Cement and Super-EBA after apicoectomy. Sealing ability of MTA and Super-EBA in dye penetration tests].
abstract: The present in vitro study investigated the sealing of retrograde fillings compounded of two different cements in consideration of cracking after root-end preparation of resected dental roots using diamond-coated ultrasonic retrotips. Root-end cavities were prepared in 32 resected roots using diamond-coated ultrasonic retrotips. The samples were divided into two groups. The first group was filled using zinc-oxide cement (Super-EBA-Cement), the second with mineral-trioxide-aggregate (Pro Root MTA). After resection, root-end preparation and retrograde filling, the samples were analysed using macro-zoom photography and scanning electron microscopy. The sealing quality of the filling materials was detected through dye penetration test. The average degree of penetration of the samples filled with Super-EBA-Cement was 2.19 and of the samples filled with Pro Root MTA 0.44 respectively. Accordingly the sealing of Pro Root MTA in vitro is superior to the sealing of Super-EBA-Cement. Retrograde conditioning of resected roots with ultrasonic retrotips represents an efficient and sparing alternative to conventional root-end preparation techniques.
authors.affiliation: Klinik für Zahn-, Mund- und Kieferkrankheiten und Kieferchirurgie, Universität Zürich.
authors.forename: Christoph B
authors.initials: CB
authors.lastname: Schultz
authors.forename: Patrick
authors.initials: P
authors.lastname: Westhauser
authors.forename: Beatrice
authors.initials: B
authors.lastname: Nideröst
authors.forename: W Grätz
authors.initials: WG
authors.lastname: Klaus
mesh_terms: D000328:Adult; D017607:Aluminum Compounds; D001047:Apicoectomy / Q000295:instrumentation; D017610:Calcium Compounds; D004396:Coloring Agents; D003763:Dental Leakage; D017220:Dentin-Bonding Agents; D004338:Drug Combinations; D005260:Female; D006801:Humans; D008297:Male; D008855:Microscopy, Electron, Scanning; D010087:Oxides; D012184:Retrograde Obturation / Q000295:instrumentation / Q000379:methods*; D012387:Root Canal Filling Materials; D017640:Silicates
chemical_list: D017607:Aluminum Compounds; D017610:Calcium Compounds; D004396:Coloring Agents; D017220:Dentin-Bonding Agents; D004338:Drug Combinations; D010087:Oxides; D012387:Root Canal Filling Materials; D017640:Silicates; C086631:mineral trioxide aggregate; C084074:Super EBA