CBCT Measurement And Analysis Of Adult Zygomatic Alveolar Crest Implant Area

Research purposes:This experiment will use CBCT to measure the bone thickness and root length at different sites of the alveolar ridge,and the thickness of the bone in the implant area is directly related to the shedding rate and stability of implanted nails.Stable nails provide a reference for the stable implantation and safety of dental caries.Research methods:42 patients who met the experimental requirements were collected.The patients were scanned with Planmeca Pro Max 3D to obtain CBCT images.The data was imported into Planmeca Romexis 3.8.2R software in DICOM format for sagittal,coronal,transverse,and three-dimensional surface reconstruction.The mesial roots of the maxillary first molars,the distal mesothelium of the maxillary first molars,the intermaxillary area of the maxillary first molars and the maxillary second molars,and the proximal molars of the maxillary second molars were measured at 6 mm from both sides of the alveolar ridges.8mm,10 mm total 12 sites of cortical bone thickness and root length.The data obtained were statistically analyzed using SPSS19.0 software,and the differences in cortical bone thickness at different heights of the alveolar ridge were analyzed.When P<0.05,it was statistically significant.Result:1.The results showed that there was no significant difference between the two measurements of the left and right side of the measurement data(P > 0.05),and the combined bilateral side measurements were averaged and analyzed.2.Cortical bone thickness of the gingival crevice: The maximum mean value of the cortical bone thickness at the buccal side was the proximal mesiobuccal apex of the maxillary second molar at a distance of 10 mm from the alveolar ridge(1.94±0.25mm).The mean minimum point was the maxillary The molar apical mesial apex was 6mm from the alveolar crest(1.52 ± 0.28 mm).3.There was no statistically significant difference in the thickness of cortical bone at the same height in all sites(P>0.05).The distribution was relatively uniform.4.Root length test results: The minimum value was 8.62 mm and the maximum value was 14.75 mm.The mean value was the maximum mesial root of the maxillaryfirst molar(11.68±1.51mm),and the mean value was the lowest mesothelium of the maxillary first molar.(11.23±1.62mm).Conclusion:1.By measuring the cortical thickness of the proximal and distal mesothelial roots of the maxillary first molars and the mesothelial roots of the second molars in the gingival sulcus region,the results are as follows: The thicker the bone is.2.By measuring the root length of the maxillary posterior teeth,the results are as follows: the maxillary first molars proximal mesothelial root(11.68mm)> the maxillary second molars proximal mesothelial root(11.46mm)> the maxillary first molar distal mesothelial root(11.23mm)3.According to the measurement and analysis sites in this study,the maxillary second mesothelium has the thickest bone plate in the mesoscopic region,and the anchorage nail can be implanted there to obtain better stability.