Evaluation of Bone Density and Three-dimensional Position of Implant in Pterygomaxillary Region using CBCT

doi:10.13701/j.cnki.kqyxyj.2022.06.011

Abstract

Abstract: Objective: To measure the bone density and three-dimensional implant position in the pterygomaxillary region by CBCT image. Methods: CBCT images of 100 patients with maxillary posterior tooth loss and severe alveolar bone atrophy were analyzed. The implant was virtually implanted in the pterygomaxillary region, and the density of the area and the inclination angle and position characteristics of the implant were measured. Results: Bone density was (288.9±168.6) HU and (553.8±188.3) HU, respectively, with confidence interval of 95%. There was no significant correlation between age and gender and bone mineral density in maxillary tuberosity region and pterygoid region (P>0.05). The length and diameter of the implants were (13.1±1.8) mm and (3.6±0.5) mm respectively. Compared with the Frankfort plane, the mesio-distal axial of the implant was (66.17±3.98)°and buccal-palatal axial was (83.51±3.24)°. The length of the bone column was (17.0±2.5) mm, the distance across the pterygomaxillary junction was (1.7±1.0) mm, and the average distance between the midpoint of the implant shoulder and the end of the maxillary tuberosity was (6.9±1.5) mm. Conclusion: In this study, it is recommended to use implants with a length of 10-18mm at an angle of about 70° in the mesio-distal axial and about 80° in the buccal-palatal axial to make better use of dense bone, which improved implant stability and reduced complications.

Key words: pterygoid implant, pterygomaxillary, atrophic posterior maxilla

JIANG Zhaoxia, QU Zhe, HAN Wenli. Evaluation of Bone Density and Three-dimensional Position of Implant in Pterygomaxillary Region using CBCT[J]. Journal of Oral Science Research, 2022, 38(6): 540-544.

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