Accuracy of Implant Height and Width Measurement Based on Cone-beam CT

doi:10.13701/j.cnki.kqyxyj.2023.06.006

Abstract

Abstract: Objective: To investigate the accuracy of implant height and width measurement in the mandibular first molar region based on cone-beam CT (CBCT), and to establish an accurate method for bone measurement in the implant region. Methods: CBCT images of 64 patients with mandibular first molar implants were collected. Two methods were used to measure sagittal height (SH),coronal height (CH),sagittal width (SW), and coronal width (CW) of dental implants. Method 1: the images were analyzed using the built-in software NNT 9.0 software. An oral radiology postgraduate student reconstructed the sagittal and coronal images based on his experience. The SH1,CH1,SW1, and CW1 were measured on the reconstructed images. Method 2: the raw data were demonstrated in expert mode of NNT 9.0 software, in which the coronal axis and sagittal axis were rotated paralleling to the long axis of the implant for reconstruction. The same student reconstructed and measured SH2,CH2,SW2, and CW2. The results of two methods were compared with the actual implant size (H0, W0). The paired T-test was performed for statistical analysis. Results: For method 1, there was no significant differences between SH1 and H0 (P>0.05), but significant differences between CH1 and H0,SW1 and W0, and CW1 and W0 (P<0.05). For method 2, there were no significant differences between all measurements and actual size (P<0.05).Conclusion: The modified triaxial rotation method is more accurate for implant height and width measurements on CBCT images.

Key words: cone beam CT, sagittal, coronal, height, width, modified triaxial rotation method

YUAN Zhengding, MOU Yongbin, LI Shuyuan, LIN Zitong. Accuracy of Implant Height and Width Measurement Based on Cone-beam CT[J]. Journal of Oral Science Research, 2023, 39(6): 496-499.

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