The effect of blood contamination on compressive strength of two materials used in treatment of furcation perforation (A comparative study)


Background: blood contamination of the materials used for treatment of furcation perforation can affect on theirphysical properties (such as compressive strength). The aim of this study was to compare the effect of bloodcontamination on compressive strength for Mineral Trioxide Aggregate MTA and Resin Modified Glass IonomerCement RMGIC during furcation perforation management.Materials and methods: Forty plastic molds (4 mm diameter and 2mm thickness) were constructed to form samples.Ten samples were made for each group: MTA-without blood contamination GI, MTA- with blood contamination GII,RMGI- without blood contamination GIII and RMGI- with blood contamination GIV, and kept in plastic tubes withmoist cotton pellet at 37 oC for 4 days then all samples were subjected to compressive strength test by Instron testingmachine. Data were subjected to statistical analysis using descriptive analysis, ANOVA and t- test.Results: statistical analysis of the results showed that there was a highly significant differences in compressive strengthbetween GI and GII ( P< 0.01)and significant differences between GIII and GIV, GIII and GI, GIV and GII (P < 0.05),With lowest mean of compressive strength value was recorded to MTA- with blood contamination GII (31.32 ± 0.022Mpa) and highest mean for RMGI- without blood contamination GIII ( 168.725± 0.063Mpa).Conclusion: compressive strength value for both MTA and RMGI cement reduced when exposed to blood duringtreatment of furcation perforation, RMGI cement has higher value of compressive strength than MTA and it could besuitable choice in treatment of Furcal perforation in presence of bleeding and placing of coronal restoration after 4days.