Evaluation of Inflammatory Bone Tissue Reaction to White MTA, Porthland Cement in Rabbits

White MTA، and Portland cement have similar chemical structures. The aim of this study was to evaluate the inflammatory reaction of rabbit bone tissues to implanted white MTA، and Portland cement. Subjects and In this in vivo study، twenty 1-year old male Iranian rabbits (experiment white Specie)، were divided into 5 groups (4 in each group). After preparation of 3 holes (distance 2 cm- depth and diameter 2 mm) in tibia، the allocated groups received an intra-bony implant of the test materials (White MTA، or Portland cement) and the third hole، with no implant، was created to evaluate inflammatory reaction related to surgical trauma. Samples were processed for histological study after 7، 15، 30، 60، and 90 days. Furthermore، blood samples were taken for evaluation of systemic inflammation for ESR test. The results were analyzed using Kruskal-Wallis and Mann–Whitney tests. At similar time points، statistical analysis revealed significant difference between implanted material (white MTA، Portland cement) in the first and second holes with control hole due to bone tissue reaction but pair-wise evaluation Between all of implanted material found no significant differences. In different times bone tissue reaction showed significant differences. The finding of this study demonstrated a similar tissue compatibility between both implantable materials and improvement of tissue healing occur with similar time profile after material implanting.