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العنوان
Accuracy of two types of electronic apex
locators in detecting simulated incomplete
root fractures\
المؤلف
Abdel-Ghaffar, Noha Ali Mokhtar.
هيئة الاعداد
باحث / Noha Ali Mokhtar Abdel-Ghaffar
مشرف / Ehab El SayedHassanein
مشرف / Shehab El-Din Mohamed Saber
مناقش / Shehab El-Din Mohamed Saber
تاريخ النشر
فى كيفية تحديد اماكن كسور غير كاملة فى جذور الاسنان.
عدد الصفحات
83p. :
اللغة
الإنجليزية
الدرجة
ماجستير
التخصص
الطب (متفرقات)
تاريخ الإجازة
1/1/2014
مكان الإجازة
جامعة عين شمس - كلية طب الأسنان - علاج الجذور
الفهرس
Only 14 pages are availabe for public view

from 83

from 83

Abstract

The aim of this study was to compare the accuracy of a
dual frequency and multi-frequency electronic apex
locators in detecting simulated incomplete horizontal and
vertical root fractures.
A total of 65extracted human permanent single rooted
teeth were selected for use in this study. The sixty five
samples were classified into two main groups according to
the type of fracture that was made; group (I) for horizontal
fractures (45teeth) and group (II) for vertical fractures (20
teeth). Group (I) was subdivided into three subgroups
according to the location of fracture, subgroup (I1) for
coronal-third fractures and subgroup (I2) for middle-third
fractures and (I3) for apical-third fractures (15 teeth each).
Incomplete horizontal and vertical root fractures were
simulated by 0.20 mm-thick diamond disk under copious
amount of water coolant until the canal got exposed.
To verify canal exposure, sterile saline was injected in
each canal and saline leakage from the simulated fracture
site was examined visually with the help of cotton pellets.
To confirm the actual vertical fracture level for group II
with vertical root fractures, a k-file #10 or #15 was then
introduced through the cut perpendicular to the long axis
of the root.
Resinous cast model was used to fix the teeth. Alginate
impression material was mixed and poured into it and
roots were immersed in it before setting. To establish an
electric circuit of the EALs, both lip clips of the devices
were immersed in the alginate before setting and the file
holders attached to K-file# 15. This K-file# 15 was then
introduced into each root canal until the meter reaches
Summary & Conclusion
06
the mark ”apex” on the screen of each EAL and the
beeping sound heard.
Measurements were obtained immediately after setting
of the alginate impression material. All samples were
measured using both Root ZX apex locator and ipex apex
locator instantaneously. Data were collected and
statistically analyzed.
Results showed that tested devices were only accurate
and reliable to detect horizontal root fractures at the
cervical level only whereas for the middle and apical
horizontal root fractures as well as for the vertical root
fractures, they were inaccurate. No significant difference
was found between the Root ZX and the Ipex when
determining the location of horizontal fractures as well as
detection of vertical fractures.
Within the limitations of this study it can be concluded
that;
1. Electronic apex locators are accurate in detecting
horizontal root fractures at the cervical third of the
root.
2. Electronic apex locators are not reliable in detecting
horizontal root fractures at the middle and apical thirds
of the root.
3. Electronic apex locators are not reliable in detecting
vertical root fractures.
4. Accuracy of the electronic apex locator was not
affected by operating mode.
Summary & Conclusion
06
Recommendations
1) In vivo assessment of EALs ability to detect horizontal
and vertical root fractures is recommended.
2) Detection of vertical, oblique or horizontal root fracture
should be supplemented with CBCT examination.
3) Further studies can be conducted to investigate the
accuracy of EAL to detect horizontal and vertical root
fractures with different widths and different canal
contents