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Effect of blood contamination on retention characteristics of MTA when mixed with different liquids
Richard A Vanderweele1, Scott A Schwartz, Thomas J Beeson
1Department of Endodontics, Lakenheath Air Base, UK.
Abstract:
Simulated furcation perforations were repaired with and without blood contamination utilizing tooth-colored mineral trioxide aggregrate (MTA) mixed with either MTA liquid (sterile water), lidocaine, or saline. Samples underwent Instron testing at either 24 or 72 hours and at 7 days. Data were analyzed using a 3-way ANOVA and post-hoc testing using Turkey's true test for significance. All of the 72-hour samples displayed significantly greater resistance to displacement than the 24-hour samples. All of the 7-day samples displayed significantly greater resistance to displacement than the 24-hour and 72-hour samples. Non-contaminated samples displayed significantly greater resistance to displacement than their blood-contaminated counterparts at 7 days. Non-contaminated samples mixed with sterile water, lidocaine, or saline performed similarly at all time periods. Allowing tooth-colored MTA to set undisturbed for 72 hours or longer prior to placement of a coronal restoration may decrease the chance of MTA displacement in furcation perforation repairs.
Insights
Tooth-colored mineral trioxide aggregate (MTA) repairs in furcation perforations showed increased resistance to displacement over time. Non-contaminated MTA exhibited superior strength compared to contaminated samples, suggesting longer setting times improve repair stability.
Area of Science:
- Dental materials science
- Restorative dentistry
- Biomaterials engineering
Background:
- Furcation perforations are challenging endodontic complications.
- Mineral trioxide aggregate (MTA) is a common repair material.
- Understanding MTA's mechanical properties under various conditions is crucial.
Purpose of the Study:
- To evaluate the displacement resistance of tooth-colored MTA in simulated furcation perforations.
- To assess the influence of blood contamination and mixing solutions on MTA's mechanical integrity.
- To determine the effect of setting time on MTA displacement resistance.
Main Methods:
- Simulated furcation perforations were repaired with tooth-colored MTA.
- MTA was mixed with sterile water, lidocaine, or saline, with and without blood contamination.
- Samples were tested for displacement resistance using Instron testing at 24 hours, 72 hours, and 7 days.
- Data were analyzed using a 3-way ANOVA and Turkey's post-hoc test.
Main Results:
- All samples showed significantly greater resistance to displacement at 72 hours and 7 days compared to 24 hours.
- Samples tested at 7 days exhibited significantly higher resistance than those at 24 and 72 hours.
- Non-contaminated MTA demonstrated significantly greater resistance than blood-contaminated MTA at 7 days.
- Different mixing solutions (sterile water, lidocaine, saline) did not significantly affect performance at similar time points.
Conclusions:
- Allowing tooth-colored MTA a minimum of 72 hours to set undisturbed enhances its resistance to displacement in furcation repairs.
- Minimizing blood contamination during MTA placement is advisable for improved long-term stability.
- Adequate setting time is a critical factor for the success of MTA in furcation perforation repairs.
