Purpose: Bone grafts can be challenging to assess on cone-beam computed tomography (CBCT) examinations due to their discreet appearance and the potential introduction of metallic artifacts from implant screws. This study aimed to evaluate the effect of CBCT milliamperage (mA) on detecting bone graft dehiscence adjacent to titanium (Ti) and zirconia (Zr) implants. Materials and Methods: Twenty Ti and 20 Zr implants were installed in bovine rib blocks. Gaps of at least 2 mmwere created between the implant and the bone and filled with particulate autogenous bone grafts. In half of the blocks, the gap was completely filled, while in the other half, the grafting material was removed up to the thirdimplant thread. CBCT images were acquired at 4, 6.3, and 10 mA and evaluated by 5 observers to detect bone graftdehiscence. The area under the receiver operating characteristic curve, accuracy, sensitivity, and specificity werecalculated. These values were then compared across various dental implant materials and mA levels using 2-wayanalysis of variance with a significance level of 5%. Results: No statistically significant differences were observed in the diagnostic values for bone graft dehiscencebetween implant types (P>0.05) or mA settings (P>0.05). Conclusion Although a protocol with lower radiation exposure (that is, lower mA) could be employed, the use of CBCT for evaluating bone graft dehiscence adjacent to different types of dental implants should be approached with caution.

Purpose: Bone grafts can be challenging to assess on cone-beam computed tomography (CBCT) examinations due to their discreet appearance and the potential introduction of metallic artifacts from implant screws. This study aimed to evaluate the effect of CBCT milliamperage (mA) on detecting bone graft dehiscence adjacent to titanium (Ti) and zirconia (Zr) implants. Materials and Methods: Twenty Ti and 20 Zr implants were installed in bovine rib blocks. Gaps of at least 2 mmwere created between the implant and the bone and filled with particulate autogenous bone grafts. In half of the blocks, the gap was completely filled, while in the other half, the grafting material was removed up to the thirdimplant thread. CBCT images were acquired at 4, 6.3, and 10 mA and evaluated by 5 observers to detect bone graftdehiscence. The area under the receiver operating characteristic curve, accuracy, sensitivity, and specificity werecalculated. These values were then compared across various dental implant materials and mA levels using 2-wayanalysis of variance with a significance level of 5%. Results: No statistically significant differences were observed in the diagnostic values for bone graft dehiscencebetween implant types (P>0.05) or mA settings (P>0.05). Conclusion Although a protocol with lower radiation exposure (that is, lower mA) could be employed, the use of CBCT for evaluating bone graft dehiscence adjacent to different types of dental implants should be approached with caution.

Purpose: Bone grafts can be challenging to assess on cone-beam computed tomography (CBCT) examinations due to their discreet appearance and the potential introduction of metallic artifacts from implant screws. This study aimed to evaluate the effect of CBCT milliamperage (mA) on detecting bone graft dehiscence adjacent to titanium (Ti) and zirconia (Zr) implants. Materials and Methods: Twenty Ti and 20 Zr implants were installed in bovine rib blocks. Gaps of at least 2 mmwere created between the implant and the bone and filled with particulate autogenous bone grafts. In half of the blocks, the gap was completely filled, while in the other half, the grafting material was removed up to the thirdimplant thread. CBCT images were acquired at 4, 6.3, and 10 mA and evaluated by 5 observers to detect bone graftdehiscence. The area under the receiver operating characteristic curve, accuracy, sensitivity, and specificity werecalculated. These values were then compared across various dental implant materials and mA levels using 2-wayanalysis of variance with a significance level of 5%. Results: No statistically significant differences were observed in the diagnostic values for bone graft dehiscencebetween implant types (P>0.05) or mA settings (P>0.05). Conclusion Although a protocol with lower radiation exposure (that is, lower mA) could be employed, the use of CBCT for evaluating bone graft dehiscence adjacent to different types of dental implants should be approached with caution.

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.