Radicular Dentin Thickness Of Maxillary First Premolar As A Critical measurement. A Cone Beam Computed Tomography Study

Abstract

Introduction: Maxillary first premolar (MFP) has a complex anatomy and great, furcational groove on the palatal side of the buccal
root of the MFP represents one of its distinguishing features. Successful root canal therapy and post placement necessitate a good
understanding of the radicular dentine thickness (RDT) on the buccal root of the MFP.
Aims & objectives: The present study was to examine the radicular dentin thickness and incidence of furcation groove on the buccal
root in two-rooted maxillary first premolar among the genders by using CBCT.
Material and methods:At the dental clinics of Qassim University, a cross-sectional study was conducted using an electronic database
that included CBCT images of 400 maxillary first premolars. All the scans were analyzed for Furcation groove seen on the buccal
root's palatal side in the axial plane. The following measurements were made 1-The most coronal portion of the furcation groove,
when present in the buccal root, 2-the palatal root at the level of CEJ and 3-the palatal root 5 mm apical to the CEJ.
Result: Total of 183 CBCT scan of two rooted maxillary first premolars were matching the inclusion criteria,92 (50.27%) were males
and 91 (49.73%) were females. The furcation groove was detected in 88 teeth out of 183 MFP's. The prevalence of furcation groove
on the palatal aspect of buccal root was 48%. The Radicular dentine thickness of the most coronal part of the furcation groove in the
buccal root was higher in the males than females and differences between gender was statistically significant. No statistical difference
found for radicular dentine thickness between male and female at level of CEJ in palatal root and the palatal root 5 mm apical to the
CEJ (p<0.05).
Conclusion: MFPs revealed a comparatively greater incidence of the furcation groove on the palatal side of the buccal root. Gender
differences was statistically significant in the thickness of the dentin in the furcation groove of the maxillary first premolar at the most
coronal part of the buccal root.