Summary:
Purpose: to evaluate the resistance to displacement of tooth-colored MTA when subjected to blood contamination and the use of different mixing liquids in a furcation perforation
N= 125 extracted mandibular and maxillary molars
Materials/Methods:
•Furcation perforations were created in 120 prepared tooth sections using a #2 round bur and two complete passes of a #5 Gates Glidden
•The teeth were then divided into 12 experimental groups based on contamination status, mixing liquid, and MTA setting time (Table 1 )
•Samples underwent Instron testing at either 24 or 72 hours and at 7 days
Most highlighted Results:
•All of the 72-hour samples displayed significantly greater resistance to displacement than the 24-hour samples.
•All the 7-day samples displayed significantly greater resistance to displacement than the 24-hour and 72-hour samples
•Non-contaminated samples mixed with sterile water, lidocaine, or saline performed similarly at all time periods
•At 7 days, the resistance to displacement of the non-contaminated samples was significantly greater than that of the blood contaminated samples within each group
Clinical significance: it is recommended that bleeding be controlled at the perforation site before MTA perforation repair
