Introduction:
Endodontically treated
teeth have a worse biomechanical condition compared to intact vital
teeth. The literature shows that with endodontic treatment, tooth tissue
is lost and fracture resistance is reduced.
Aim of study was to determine difference in fracture resistance
between intact teeth and endodontically treated and obturated teeth and
which type of fracture is the most common.
Materials and Methods:
For the purpose of this research, 20 extracted single-root intact teeth
were used. By random selection, the samples were divided into 2 groups:
G1 (negative control group, n = 5) - intact teeth, G2 (experimental
group, n = 15) - treated with Hedstrom file + obturated with
Gutta-Percha and Endomethasone N. The samples were subjected to
compressive pressure on the Universal testing machine, until the moment
of breaking.
Results:
The average pressure value (
)
at which fracture occurred in G1 was 849 N, and in G2 it was 772.33 N.
The standard deviation (s)
of the pressure value at which the fracture in G1 occurred was 246.86 N,
and for G2 it is 810.74 N. The largest percentage of samples had
multiple fracture lines (in 100% of G1 samples; in 53.3% of G2 samples).
Conclusion:
In all groups, the most common fractures according to direction were
combined, and according to complexity multiple. Although the pressure
values at which the fractures occurred in the first group were
significantly higher than in the second group, from the statistical
analyses (Student's t-test with a value of 0.69, CI 95%, p < 0.05), we
conclude that there is no noticeably significant difference in the
average value of the pressure at which a fracture occurs in both groups.
Key words: intact teeth, endodontically treated teeth, fracture, fracture resistance
Address of correspondence:
Ass. Dr. Verica Toneva Stojmenova, DMD,
Faculty of medical sciences, Goce Delcev University
Krste Misirkov BB, Štip, North Macedonia,
Phone:+38977691495,
E-mail: verica.stojmenova@ugd.edu.mk
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Naissi