Micro-CT evaluation of the effectiveness of the combined use of rotary and hand instrumentation in removal of Resilon.
This study compares the effectiveness of ProTaper rotary files with ProTaper retreatment and K-files in the removal of Resilon or gutta percha (GP) from canals filled either by cold lateral condensation or thermal obturation using micro-CT. Ninety-six teeth were prepared using ProTaper files and allocated into four groups (n=24): Group-1 was filled with GP/AH-Plus and Group-2 with Resilon/RealSeal using cold lateral condensation. Group-3 was filled with GP/AH-Plus and Group-4 with Resilon/RealSeal using System B and Obtura II. The roots were scanned by micro-CT. Each group was divided into two subgroups (n=12): A, retreated using ProTaper files and B, using ProTaper retreatment and K-files. The roots were scanned to calculate the volume of the remaining material. With thermal obturation, roots filled with Resilon had significantly more remaining material than GP. Obturation using thermal technique resulted in significantly less remaining material than cold condensation except Resilon retreated using ProTaper retreatment and K-files.
School of Dentistry, University of Manchester.
Fatma
F
Asheibi
Alison J E
AJ
Qualtrough
Anthony
A
Mellor
Philip J
PJ
Withers
Tristan
T
Lowe
D003188:Composite Resins / Q000737:chemistry; D003481:Cuspid; D003762:Dental Instruments; D006171:Gutta-Percha; D006801:Humans; D066298:In Vitro Techniques; D007180:Incisor; D008422:Materials Testing; D012387:Root Canal Filling Materials / Q000737:chemistry*; D012389:Root Canal Obturation / Q000295:instrumentation*; D013499:Surface Properties; D014092:Tooth Root / Q000000981:diagnostic imaging*; D055114:X-Ray Microtomography
D003188:Composite Resins; C511498:Real Seal composite resin; D012387:Root Canal Filling Materials; C113130:obtura II; C486892:resilon sealer; D006171:Gutta-Percha