IADR Abstract Archives
Evaluation of Enamel Thickness in Different Levels by Using Cone Beam Computed Tomography
Objectives: To evaluate adequate enamel thickness of maxillary and mandibular incisors, canines and premolars in each quadrants and cervical, middle and incisal (occlusal) levels for enamel reduction procedure by using Cone Beam Computed Tomography (CBCT), and this study should also provide information about sexual dimorphism in enamel thickness and statistical association between mesiodistal crown widths and enamel thickness.
Methods: CBCT records of 101 subjects (mean age: 20.88 ± 2.48) were examined. Enamel thickness was measured both mesial and distal region of tooth in different levels as cervical, middle, and incisal (occlusal) 1/3. Crown widths were evaluated between mesial and distal contact points of tooth crown. Bland-Altman plots, student t-test, Mann-Whitney U-test and Pearson correlation coefficients a simple linear regression analysis used for statistical analysis.
Results: Middle 1/3 distal enamel thickness of right maxillary lateral incisors was thinner than and the middle 1/3 both mesial and distal enamel thickness of right maxillary central incisors was thicker than the opposite quadrant. Enamel thickness of mandibular first premolars and canines was thicker in right side on multiple surfaces. Mesial enamel of maxillary first premolars, canines and lateral incisors and mandibular premolars and canines were statistically significant thicker than and mesial enamel thickness of maxillary second premolars was thinner than distal enamel. The mesial enamel of mandibular first premolars was significant thick in females; enamel thickness of males was shown significant differences on mesial and total surfaces of maxillary laterals. Maxillary and mandibular first and second premolars had a strong correlation between mesiodistal crown widths and enamel thickness.
Conclusions: Mesial and distal enamel thickness was unique for each one tooth at different levels. To generalize for all teeth was impossible with regard to approximal enamel thickness as distal or mesial. Mesial enamel of lower first premolars in females and mesial and total enamel of upper laterals in males were significantly thick. Approximal enamel thickness and crown widths of all premolar teeth were strongly correlate.
Methods: CBCT records of 101 subjects (mean age: 20.88 ± 2.48) were examined. Enamel thickness was measured both mesial and distal region of tooth in different levels as cervical, middle, and incisal (occlusal) 1/3. Crown widths were evaluated between mesial and distal contact points of tooth crown. Bland-Altman plots, student t-test, Mann-Whitney U-test and Pearson correlation coefficients a simple linear regression analysis used for statistical analysis.
Results: Middle 1/3 distal enamel thickness of right maxillary lateral incisors was thinner than and the middle 1/3 both mesial and distal enamel thickness of right maxillary central incisors was thicker than the opposite quadrant. Enamel thickness of mandibular first premolars and canines was thicker in right side on multiple surfaces. Mesial enamel of maxillary first premolars, canines and lateral incisors and mandibular premolars and canines were statistically significant thicker than and mesial enamel thickness of maxillary second premolars was thinner than distal enamel. The mesial enamel of mandibular first premolars was significant thick in females; enamel thickness of males was shown significant differences on mesial and total surfaces of maxillary laterals. Maxillary and mandibular first and second premolars had a strong correlation between mesiodistal crown widths and enamel thickness.
Conclusions: Mesial and distal enamel thickness was unique for each one tooth at different levels. To generalize for all teeth was impossible with regard to approximal enamel thickness as distal or mesial. Mesial enamel of lower first premolars in females and mesial and total enamel of upper laterals in males were significantly thick. Approximal enamel thickness and crown widths of all premolar teeth were strongly correlate.