EFFECT OF PREPARATION DESIGN ON MECHANICAL PROPERTIES OF ENDODONTICALLY TREATED TEETH.
Shady Ali Hussein; Laithy, Ahmed;
Abstract
This study is aimed to evaluate the effect of different tapers and
restorative cavity designs on the fracture resistance of the endodontic
retreated tooth. Sixty lower first premolar human extracted teeth from
the teeth bank of faculty of dentistry, Ain Shams University have been
used in this study and divided into 3 different groups. Group I: Access
cavity class I preparation was made. Group II: Access cavity occluso mesial cavity (OM) class II preparation was made. Group III: Access
cavity mesio-occluso-distal (MOD) class II cavity preparation was
made. These main groups were further sub divided into two sub groups,
subgroup A: cleaning and shaping was done using Twisted File (TF)
#25 taper 0.04, subgroup B: cleaning and shaping was done using
Twisted File (TF) #25 taper 0.06. The fracture resistance of all groups
had been evaluated & analyzed; results using Two-Way ANOVA
showed that the cavity design had a significant effect on the fracture
strength. On the other hand, neither the taper nor the interaction of the
independent variables (taper and cavity design) had a significant effect
on the fracture strength of teeth. It has been concluded that the
remaining coronal tooth structure is the corner stone in weakening the
tooth structure while the root canal geometry is not a mechanical cause
of failure.
restorative cavity designs on the fracture resistance of the endodontic
retreated tooth. Sixty lower first premolar human extracted teeth from
the teeth bank of faculty of dentistry, Ain Shams University have been
used in this study and divided into 3 different groups. Group I: Access
cavity class I preparation was made. Group II: Access cavity occluso mesial cavity (OM) class II preparation was made. Group III: Access
cavity mesio-occluso-distal (MOD) class II cavity preparation was
made. These main groups were further sub divided into two sub groups,
subgroup A: cleaning and shaping was done using Twisted File (TF)
#25 taper 0.04, subgroup B: cleaning and shaping was done using
Twisted File (TF) #25 taper 0.06. The fracture resistance of all groups
had been evaluated & analyzed; results using Two-Way ANOVA
showed that the cavity design had a significant effect on the fracture
strength. On the other hand, neither the taper nor the interaction of the
independent variables (taper and cavity design) had a significant effect
on the fracture strength of teeth. It has been concluded that the
remaining coronal tooth structure is the corner stone in weakening the
tooth structure while the root canal geometry is not a mechanical cause
of failure.
Other data
Title | EFFECT OF PREPARATION DESIGN ON MECHANICAL PROPERTIES OF ENDODONTICALLY TREATED TEETH. | Authors | Shady Ali Hussein; Laithy, Ahmed | Keywords | preparation design;Mechanical properties;Endodontically treated teeth | Issue Date | Nov-2018 | Publisher | International Journal of Advanced Research (IJAR) | Journal | International Journal of Advanced Research (IJAR) | Volume | 6 | Issue | 11 | Start page | 340 | End page | 344 | DOI | 10.21474/IJAR01/8003 |
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