Relation between skeletal protrusion of jaws and labiolingual inclination of teeth with anterior alveolar bone thickness in Cone Beam CT images

Abstract

Background and Objectives: The marginal Breakdown of the peri implant is commonly seen after placing of the implant. In addition to support, the bone tissue affects the soft tissue's elegance around the implant restoration. Therefore, the ideal 3D implant with bone available in all directions is the key to achieving successful beauty outcomes. The aim of the present study was to determine the correlation between skeletal jaw protrusions and labiolingual inclination of teeth with alveolar bone thickness in the anterior maxillary and lower anterior regions of the cone beam tomography (CBCT) images. Materials and Methods:In this study, CBCT images were prepared by the NewTom VG Cone Beam CT (QRRSI, Verona, Italy) and scanned in the same conditions for kVp 110, 3.6 second and 4.71 mA expression.The images were evaluated by two experts who had experience working with CBCT images, and the thickness of the labial bone in the anterior maxillary and mandible area, protrusion of the maxilla and mandible and labiolingual inclination of the teeth were determined.The analysis was performed using SPSS 20 software and P-value less than 0.05 was considered significant. Results: The mean SNA was 85.280, SNB was 82.793, U1_NA was 24.817, and L1_NB was 26.290.The Pearson test statistic of the SNB variable except for the maxilla and region B of the third tooth in the remaining teeth of both jaws was greater than 0.05 and the Pearson test statistic between bone thickness in maxilla and variable U1_NA, and between bone thickness variable in mandible and L1_NB variable was greater than 0.05, which indicates no significant correlation. Conclusion: Upper and lower jaws are in normal position and the maxilla is slightly further than the mandible, and the thickness of the alveolar bone in the right and left is not significantly different.Except for area B of the third tooth, there is no significant relationship between the thickness of the alveolar bone and the mandibular and maxillary angles.The mandibular teeth have a greater lingual inclination than the maxillary teeth. No significant relationship was found between the thickness of the bone and the angle of the teeth in the upper and lower jaw.