Accuracy of linear measurements around dental implants by means of cone-beam computed tomography with different exposure parameters.

Accuracy of linear measurements around dental implants by means of cone-beam computed tomography with different exposure parameters.

Dentomaxillofac Radiol. 2017 Mar 07;:20160377

Authors: Bohner LO, Tortamano P, Marotti J

Abstract
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=18) were installed in the maxilla of human dry skulls and images were obtained using two CBCT devices; G1-Care Stream 9300 (70kVp, 6.3mA, voxel size 0.18mm, field of view 8x8 cm) and G2-R100 Veraview (75kVp, 7.0mA, voxel size 0.125mm, field of view 8x8cm). Measurements of bone thickness were performed in three points, located in the most apical portion of implant (A); 5 mm above the apical point (B) and implant platform (C). Afterward, values were compared with real measurements obtained by an optical microscopy (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 points A (CG4.85±2.25 mm, G1:4.19±1.68 mm, G2:4.15±1.75 mm), B (CG:1.50±0.84 mm, G1:1.61±1.27 mm; G2:1.68±0.82 mm) and C (CG:1.78±1.33 mm, G1:1.80±1.09 mm; G2:1.64±1.11 mm). G1 and G2 differed the bone thickness in approximately 0.76 mm for point A, 0.36 mm for point B and 0.08 mm for point C. A lower intra-class variability was identified for CG (Points A= 0.20±0.25; B=0.15±0.20; C=0.06±0.05mm) in comparison with G1 (Points A= 0.56±0.52; B=0.48±0.50; C=0.47±0.56mm) and G2 (Points A= 0.57±0.51; B=0.46±0.46; C=0.36±0.31mm).
CONCLUSION: CBCT devices showed acceptable accuracy for linear measurements around dental implants, despite the exposure parameters used.

PMID: 28267928 [PubMed - as supplied by publisher]

http://ift.tt/2ne8u6x