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The sealing ability of IBM® with the addition of hydroxyapatite as a retrograde root filling
Author(s) -
Owadally I. D.,
Chong B. S.,
Ford T. R. Pitt,
Watson T. F.
Publication year - 1993
Publication title -
dental traumatology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.82
H-Index - 81
eISSN - 1600-9657
pISSN - 1600-4469
DOI - 10.1111/j.1600-9657.1993.tb00276.x
Subject(s) - dentistry , cement , amalgam (chemistry) , penetration (warfare) , materials science , chemistry , composite material , medicine , mathematics , electrode , operations research
The effect of adding 10% & 20% hydroxyapatite (HAP) on the sealing ability of IRM (Intermediate Restorative Material) when used as a retrograde root filling was assessed using a confocal optical microscope with a fluorescent dye. This was compared with another reinforced zinc‐oxide eugenol cement (Kalzinol), ethoxybenzoic acid (EBA) cement and amalgam. The root canals of 70 extracted human single‐rooted teeth were prepared and filled with gutta‐percha and sealer. All the teeth were apicected, retrograde cavities were prepared, and then divided into groups of 10 teeth each and filled with the test materials. A remaining group of 10 teeth were used as controls. The extent of dye penetration around IRM, IRM + 10% and IRM + 20% HAP was not significantly different. There was also no difference in the extent of dye penetration between EBA cement and IRM. However the sealing ability of both these materials was better than Kalzinol and amalgam. All the amalgam retro‐ grade root fillings leaked, exhibiting the poorest sealing ability. Dye penetrated into the root canals of all the positive controls whereas there was no dye penetration in the negative controls. The addition of 10% or 20% hydroxyapatite did not adversely affect the good sealing ability of IRM.