الفهرس 
Anatomy of the root apexOnly 14 pages are availabe for public view
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Abstract
This study was conducted to evaluate the effect of pulp condition on the
accuracy of apex locator compared with periapical radiograph. 50 patients
were collected for this study. Endodontic treatment was performed with
root length measurement with 5th generation apex locator (AL). X-ray
was performed while the file in place to verify the working length. The
pulp was extirpated for histological and histochemical examination. After
histopathological and histochemical examination, the extirpated pulps
were classified into 5 groups (10 canals in each group), Group I: normal
pulp, Group II: acutely inflammed pulp, Group III: chronically
inflammed pulp, Group IV: degenerated pulp, Group V: degenerated pulp
with periapical radiolucency. from the radiographic findings and
histopathological finding we concluded that presence of pulp tissue inside
the canal (normal or inflammed pulp tissue) affects the accuracy of AL
during root length determination. As AL gives the most accurate readings
in case of degenerated pulp without periapical radiolucency. While in
case of degenerated pulp with periapical radiolucency, the AL tends to
give over reading in most cases