Influence of increased slice thickness and sharpening filter application in the detection of bone graft loss around implants
- Author:
Débora Costa RUIZ
1
;
Matheus BARROS-COSTA
;
Michelle CHANG
;
Henrique Mateus Alves FELIZARDO
;
Hugo GAÊTA-ARAUJO
;
Deborah Queiroz FREITAS
Author Information
- Publication Type:Original Articles
- From:Imaging Science in Dentistry 2025;55(4):409-416
- CountryRepublic of Korea
- Language:English
-
Abstract:
Purpose:This study investigated the effect of increasing slice thickness and applying sharpening filters on the diagnosis of bone graft loss in regions adjacent to zirconia implants using cone-beam computed tomography (CBCT).
Materials and Methods:Twelve zirconia implants were inserted into mandibles, followed by bone graft application.Graft loss was then simulated in half of the samples. CBCT scans were obtained using 2 devices (OP300 and Eagle 3D) with parameters set at 90 kVp, 8 mA, and a 133 μm voxel size. Five examiners assessed the scans under different conditions: original thickness, 1 mm, 2 mm, no filter, Sharpen 1 × , and Sharpen 2 × . The area under the receiver operating characteristic curve (AUC), sensitivity, and specificity were calculated and compared using 2-way analysis of variance (α = 5%).
Results:For the OP300 device, increasing slice thickness to 1 mm impaired AUC, sensitivity, and specificity metrics(P<0.05). Overall, filter application reduced this impairment (P<0.05). For the Eagle device, slice thickness didnot affect diagnostic metrics, but specificity values increased with sharpening filter application on scans at originalthickness or with 1 mm slices (P<0.05).
Conclusion:For 1 device, a 1 mm increase in slice thickness impaired the diagnosis of bone graft loss in areasadjacent to zirconia implants. However, the application of sharpening filters helped mitigate this impairment.
