Comparative Study on Mandibular Canal Clarity in Middle-aged and Elderly Female Implant Patients Using Different CBCT Devices

doi:10.13701/j.cnki.kqyxyj.2025.07.010

Abstract

Abstract: Objective: To compare the clarity of mandibular canal on cone-beam computed tomography (CBCT) images with different CBCT devices in middle-aged and elderly female patients. Methods: A total of 70 middle-aged and elderly female patients from our hospital had their CBCT images captured using two different CBCT devices. Device 1 was the NewTom VGi (voltage: 110 kV, current: 1-12 mA, voxel size: 0.30 mm, field of view: 12×8 cm, exposure time: 4.3 s), and Device 2 was the Kavo 3D exam (voltage: 120 kV, current: 5 mA, voxel size: 0.25 mm, field of view: 16×13 cm, exposure time: 7 s). Radiologists assessed the clarity of the mandibular canal in the CBCT images using a three-level scoring. The clarity scores of the mandibular canal from the two CBCT devices were statistically analyzed using SPSS. In addition, radiologists provided a two-levels noise scoring for the axial images of the two CBCT devices. Results: The clarity score of the mandibular canal for Device 1 was lower than that for Device 2 (P<0.05). Subgroup analysis indicated that the difference in mandibular canal clarity between the Device 1 (1-4 mA) subgroup and Device 2 was statistically significant (P<0.05), while the differences in mandibular canal clarity between Device 2 and the Device 1 (5-7 mA) subgroup as well as the (8-12 mA) subgroup were not statistically significant (P>0.05). Apart from the current settings, the two CBCT image reconstruction algorithms showed significant differences. The images from Device 1 had no noticeable noise, while the images from Device 2 exhibited more evident noise, suggesting that the reconstruction algorithms of the two devices may differ to some extent. Conclusion: For middle-aged and elderly female implant patients, CBCT scanning parameters and image reconstruction algorithms should be selected reasonably to improve the clarity of the mandibular canal on CBCT images.

Key words: cone beam CT, middle-aged and elderly patients, mandibular canal, bone loss, tube current, image reconstruction algorithm

LUO Xuhui, LIU Shu, TENG Yuehui, LIN Zitong. Comparative Study on Mandibular Canal Clarity in Middle-aged and Elderly Female Implant Patients Using Different CBCT Devices[J]. Journal of Oral Science Research, 2025, 41(7): 601-606.

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