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KMID : 1024020140440030221
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Imaging Science in Dentistry
2014 Volume.44 No. 3 p.221 ~ p.227
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Cone-beam computed tomography analysis of root and canal morphology of mandibular premolars in a Spanish population
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:Llena Carmen
:Fernandez Jaime/:Ortolani Pablo Sebastian/:Forner Leopoldo
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Abstract
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Purpose : This study aimed to investigate the clinical anatomy of lower premolar roots in a Spanish population by using cone-beam computed tomography (CBCT), correlating findings with patient gender and tooth type.
Materials and Methods : Using 70 CBCT images, we evaluated 126 healthy, untreated, well-developed lower premolars. The number and morphology of roots and root canals, and the foramina number were assessed. Results for gender and tooth type were compared using the chi-squared and ANOVA tests.
Results : The average length of teeth and roots was significantly higher in men (p=0.00). All 126 premolars had a single root. One canal was found in 83.3% of the premolars, with no gender or tooth type differences; Vertucci configuration types I and V were the most prevalent. The first premolars showed significantly greater variability than the second premolars (p=0.03). A single apical foramen was found in 89.7% of the premolars, with no differences by tooth type. Women had a significantly higher prevalence of two apical foramina than men (p=0.04). Some degree of curvature was observed in 65% of the premolars, with no differences by gender or tooth type. A root angle of more than 20° was found in 12.98% of the premolars, without any differences by gender or tooth.
Conclusion : All premolars were single-rooted. One canal had the most prevalent morphology. More variability in canal anatomy was found in the first premolars. Curvatures greater than 20° were found at less than 5 mm from the apex.
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KEYWORD
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Bicuspid, Mandible, Anatomy, Regional, Cone-Beam Computed Tomography
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