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| Home > Publications database > Dental photon-counting computed tomography for the assessment of Peri-Implant structures. |
| Journal Article | DKFZ-2025-01659 |
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2025
Springer
Heidelberg
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Please use a persistent id in citations: doi:10.1186/s40729-025-00640-8
Abstract: To assess the diagnostic performance of photon-counting computed tomography (PCCT) in the imaging of peri-implant bone structures and to compare it quantitatively and qualitatively to cone-beam computed tomography (CBCT).Thirty titanium implants were placed in ten porcine mandibles. CBCT and PCCT scans were acquired and compared quantitatively regarding image noise and CT-values. Additionally bone thickness was compared to a gold standard at 60 standardized locations by one calibrated investigator in both modalities. Measurement accuracy was assessed by Bland-Altman analysis. Two experienced raters performed qualitative assessments of anatomic structures around the implant using a 5-point visibility scale. These included the bone-implant interface around the implant surface, the bone at the implant shoulder as well as the oral and vestibular bone lamella. Inter-rater agreement was assessed using ICC.Across all evaluated implants, CT-values in a soft-tissue region of interest adjacent to the implant increased by 11.7 ± 3.9% for CBCT acquisitions, whereas they decreased by 5.3 ± 1.3% for PCCT acquisitions. Similarly, image noise in the respective ROIs is increased by a factor of 63 ± 13% in case of CBCT acquisitions and only by 23 ± 5% in case of PCCT acquisitions. Bone thickness deviations were smaller for PCCT (mean ± SD: 0.06 ± 0.08 mm) than for CBCT (0.39 ± 0.34 mm). Qualitative assessments consistently favored PCCT (p < 0.05) with excellent inter-rater reliability (ICC > 0.75 ) in almost all categories.PCCT enables superior visualization of peri-implant bone structures with fewer artifacts and improved diagnostic accuracy.
Keyword(s): Animals (MeSH) ; Swine (MeSH) ; Cone-Beam Computed Tomography: methods (MeSH) ; Dental Implants (MeSH) ; Mandible: diagnostic imaging (MeSH) ; Mandible: surgery (MeSH) ; Tomography, X-Ray Computed: methods (MeSH) ; Photons (MeSH) ; 3D dental imaging ; CBCT ; Image quality ; Implant diagnostics ; Metal artifacts ; Peri-implant bone ; Photon-counting CT ; Dental Implants
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