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摘要
Objectives: The aim of this study was to determine the accuracy of linear measurements around dental implants when using CBCT unit devices presenting different exposure parameters. Methods: Dental implants (n=518) were installed in the maxilla of human dry skulls, and images were obtained using two CBCT devices: G1-Care Stream 9300 (70 kVp, 6.3mA, voxel size 0.18mm, field of view 838 cm; Carestream Health, Rochester, NY) and G2-R100 Veraview (R) r (75 kVp, 7.0mA, voxel size 0.125mm, field of view 8 X 8 cm; JMorita, Irvine, CA). Measurements of bone thickness were performed at three points located (A) in the most apical portion of the implant, (B) 5mm above the apical point and (C) in the implant platform. Afterwards, values were compared with real measurements obtained by an optical microscopy [ control group (CG)]. Data were statistically analyzed with the significance level of P <= 0.05. Results: There was no statistical difference for the mean values of bone thickness on Point A (CG: 4.85 +/- 2.25 mm, G1: 4.19 +/- 1.68 mm, G2: 4.15 +/- 1.75 mm), Point B (CG: 1.50 +/- 0.84 mm, G1: 1.61 +/- 1.27 mm; G2: 1.68 +/- 0.82 mm) and Point C (CG: 1.78 +/- 1.33 mm, G1: 1.80 +/- 1.09 mm; G2: 1.64 +/- 1.11 mm). G1 and G2 differed in bone thickness by approximately 0.76mm for Point A, 0.36mm for Point B and 0.08mm for Point C. A lower intraclass variability was identified for CG (Point A=50.20 +/- 0.25; Point B=50.15 +/- 0.20; Point C=50.06 +/- 0.05mm) in comparison with G1 (Point A=50.56 +/- 0.52; Point B=50.48 +/- 0.50; Point C=50.47 +/- 0.56mm) and G2 (Point A=50.57 +/- 0.51; Point B=50.46 +/- 0.46; Point C=50.36 +/- 0.31mm). Conclusions: CBCT devices showed acceptable accuracy for linear measurements around dental implants, despite the exposure parameters used.
- 出版日期2017
- 单位RWTH Aachen
