Evaluation of factors affecting alveolar ridge height and facial bone thickness in Chinese maxillary central incisors by cone beam CT

Abstract

Background/purpose In the immediate implantation of maxillary central incisors, the height of the alveolar bone is lost, and there is often a risk of bone fracture due to the thin buccal bone wall (BBW). The purpose of this study was to assess the effects of smoking, age, and root position in the alveolar bone on the BBW and the distance between the cemento-enamel junction (CEJ) and the facial bone crest (FBC) of Chinese maxillary central incisors. Materials and methods The patients were divided by smoking, gender, age, and root sagittal position in the alveolar bone. BBW thickness was measured at the following sites: the 4 mm apical to the CEJ, the middle of the root, and the apex. The distance from the CEJ to the FBC was also evaluated. Results Cone beam CT (CBCT) data for the maxillary central incisors of 645 patients (323 males and 322 females) were selected and analyzed. The CEJ-FBC distance in patients who smoked (2.79 ± 0.78 mm) was significantly greater than that of non-smokers (2.54 ± 0.69 mm). The BBW in subtype III (0.74 ± 0.43 mm, 0.81 ± 0.36 mm) was thinner than that in subtypes I and II at 4 mm apical to the CEJ and in the middle of the root, with a statistically significant difference ( p < 0.05). Conclusion In most Chinese people, smoking, gender, age, and the position of the root in alveolar bone are all important factors that must be considered before immediate implantation is undertaken.

Evaluation of alveolar bone morphology of incisors with different sagittal skeletal facial types by cone beam computed tomography: A retrospective study

“…A few sagittal root positions were Type III in maxillary incisors, suggesting that a certain degree of incisor bodily retraction is feasible. At the same time, research has found that most roots of the maxillary incisors were positioned close to the labial cortical bone [ 14 , 15 ], which is consistent with the present study that the proportion of Type II sagittal root positions was not high. At the same time, there was no significant difference in the alveolar bone thickness at each measurement site of the maxillary incisors in each group.…”

Evaluation of the clinical efficacy and safety of modified alveolar cleft bone graft with cone-beam CT digital imaging in children

“…Second stage bone grafting is the most common method for the treatment of alveolar cleft defect. The purpose of this approach is to reconstruct the alveolar cleft defect and restore the integrity of the maxilla ( 1 ). To help the permanent teeth around the fissure erupt normally, it is essential to provide good bone support for orthodontic treatment and nasolabial deformity rectification, as this can ensure the necessary bone mass required for further implant treatment.…”