Osteoblastic cytokine response to gray and white mineral trioxide aggregate.
BACKGROUND
The materials used for root-end filling and perforation repair are in direct contact with live tissues e.g. bone and connective tissue; their effects however, are uncertain. The aim of this ex vivostudy was to evaluate the osteoblastic secretory activity adjacent to gray and white mineral trioxide aggregate (MTA) and Intermediate Restorative Material (IRM).


METHODS
The studied materials were prepared and placed in 24-wells plate. Human MG-63 osteoblasts were introduced to materials after their initial set. The supernatant fluid was collected after 1, 3, and 7 days and the level of interleukin-1β was measured by ELISA test. A microscopic exam was also performed to assess proliferation and viability of the cells. Kruskal-Wallis and Tukey tests were used for analysis.


RESULTS
T here were significant higher levels of interleukin-1β in the gray and white MTA groups compared to IRM group (P<0.05). The difference in interleukin-1β secretion level between two mineral trioxide aggregate groups was not significant (P>0.05).Morphologic appearance of osteoblasts adjacent to gray and white MTA was similar to normal osteoblasts in all observation periods, however cells adjacent to IRM were round, signifying cytotoxicity of the adjacent material.


CONCLUSIONS
Human osteoblasts' has a favorable biologic response to white and gray MTA compared to IRM.
Department of Endodontics, Dental Research Center/Mashad University of Medical Sciences, Mashad, Iran.
Maryam
M
Bidar
Department of Endodontics, Dental Research Center/Mashad University of Medical Sciences, Mashad, Iran.
Mohammad Hasan
MH
Zarrabi
Department of Immunology, Dental School, Mashad University of Medical Sciences, Mashad, Iran.
Jalil
J
Tavakol Afshari
Endodontis, Mashad, Iran.
Navid
N
Aghasizadeh
Department of Endodontics, Dental Research Center/Mashad University of Medical Sciences, Mashad, Iran.
Neda
N
Naghavi
Endodontis, Mashad, Iran.
Maryam
M
Forghanirad
Dental Student, Gilan University of Medical Sciences, Rasht, Iran.
Niloufar
N
Attaran
Biocompatibility; Human; IRMCement; Interleukin-1β; Mineral Trioxide Aggregate; Osteoblast