IADR Abstract Archives
Void and Gap Evaluation of Different Types of fiberposts Cementations Using Micro-computed Tomography
Objectives: The present study aims to evaluate and quantify void and gap-area formation of different types of fiberposts cementation using micro-computed tomography (microCT) scans.
Methods: 24 Standardized typodont endodontically treated prepared roots were divided into four groups according to different cementation procedures (n=6) using a self-curing resin cement (Multilink Automix Universal Adhesive Cement, Ivoclar Vivadent) and fiberglass posts (White Post DC 3, FGM) being either relined or not with a resin composite (Empress Direct Trans 30, Ivoclar Vivadent): (1) Fiberposts cemented with the self-curing resin cement; (2) Fiberpost relined with resin composite followed by cementation; (3) Fiberpost cemented using an ultrasonic device (Smartsonic, FGM); and (4) Fiberpost relined with resin composite and cemented using ultrasonic device. Each sample was scanned using microCT, and DICOM files were transferred to a 3D reconstruction software (Amira, FEI Visualization Group) for analysis. Void volume in cementation system and gap area formation were quantified, and qualitative analysis was performed. Data were analyzed using one-way ANOVA and Tukey post-hoc test (p<0.05).
Results: Groups 1, 3 and 4 did not show a significant difference of void formation among each other. Group 2 showed the smallest percentages of voids, not being statistically different from groups 3 and 4. No significant difference was found in gap area formation between groups.
Conclusions: The use of a resin composite to reline the fiberpost significantly decreased the bubble formation in the cementation procedure. The use of an ultrasonic device did not decrease the percentage of void formation during cementation procedure. Although no significant difference was found in gap area formation between cementation procedures, qualitative analysis suggests that larger bubbles formed inside the cementation will tend to produce larger areas of gap formation in the root/cement interface.
Methods: 24 Standardized typodont endodontically treated prepared roots were divided into four groups according to different cementation procedures (n=6) using a self-curing resin cement (Multilink Automix Universal Adhesive Cement, Ivoclar Vivadent) and fiberglass posts (White Post DC 3, FGM) being either relined or not with a resin composite (Empress Direct Trans 30, Ivoclar Vivadent): (1) Fiberposts cemented with the self-curing resin cement; (2) Fiberpost relined with resin composite followed by cementation; (3) Fiberpost cemented using an ultrasonic device (Smartsonic, FGM); and (4) Fiberpost relined with resin composite and cemented using ultrasonic device. Each sample was scanned using microCT, and DICOM files were transferred to a 3D reconstruction software (Amira, FEI Visualization Group) for analysis. Void volume in cementation system and gap area formation were quantified, and qualitative analysis was performed. Data were analyzed using one-way ANOVA and Tukey post-hoc test (p<0.05).
Results: Groups 1, 3 and 4 did not show a significant difference of void formation among each other. Group 2 showed the smallest percentages of voids, not being statistically different from groups 3 and 4. No significant difference was found in gap area formation between groups.
Conclusions: The use of a resin composite to reline the fiberpost significantly decreased the bubble formation in the cementation procedure. The use of an ultrasonic device did not decrease the percentage of void formation during cementation procedure. Although no significant difference was found in gap area formation between cementation procedures, qualitative analysis suggests that larger bubbles formed inside the cementation will tend to produce larger areas of gap formation in the root/cement interface.