Assessment of metal artefact reduction around dental titanium implants in cone beam CT

Parsa, Azin; Ibrahim, Norliza; Hassan, Bassam; Syriopoulos, Kostas; Stelt, P F van der

doi:10.1259/dmfr.20140019

Cited by 50 publications

(44 citation statements)

References 25 publications

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“…; Parsa et al. ). An underestimation of bone defects around implants by approximately 1 mm was documented for CBCT analysis when compared to the histological situation in a mini‐pig model (Corpas Ldos et al.…”

Section: Discussionmentioning

confidence: 97%

Detection of peri‐implant bone defects with different radiographic techniques – a human cadaver study

Kühl

Zürcher

Zitzmann

et al. 2015

Clinical Oral Implants Res

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Section: Discussionmentioning

confidence: 97%

Detection of peri‐implant bone defects with different radiographic techniques – a human cadaver study

Kühl

Zürcher

Zitzmann

et al. 2015

Clinical Oral Implants Res

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“…Physiological bone structures can cause significant radiation scattering, which cannot be assessed in studies using homogeneous phantoms. 23 Parsa et al 23 also calculated mean greyscale values to assess AR use in sites adjacent to dental implants. By comparing the areas of interest before and after implant insertion, they reported a significant increase in mean greyscale values after surgery and, when comparing the images obtained with and without the use of the AR, found out that there was no change in greyscale values with the tool activated.…”

Section: Discussionmentioning

confidence: 99%

“…However, few studies have evaluated this tool, and the results are inconclusive as to its influence on the final image quality. [21][22][23] When evaluated for root fracture diagnosis in teeth filled with gutta-percha, the use of an AR led to decreased diagnostic sensitivity and specificity. 4 Additionally, no differences were observed in the detection of simulated periodontal and peri-implant vestibular defects with or without the use of an AR.…”

Section: Introductionmentioning

confidence: 99%

Influence of the artefact reduction algorithm of Picasso Trio CBCT system on the diagnosis of vertical root fractures in teeth with metal posts

Bezerra¹,

Neves²,

Vasconcelos³

et al. 2015

Dentomaxillofacial Radiology

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Objectives: To assess the influence of the artefact reduction algorithm (AR) available on the Picasso Trio 3D ® imaging system (Vatech, Hwaseong, Republic of Korea) on image quality [greyscale values, contrast-to-noise ratio (CNR) and artefact formation] and diagnosis of vertical root fractures (VRFs) in the teeth with intracanal metal posts. Methods: 30 uniradicular teeth had their crowns removed and their roots endodontically treated to receive intracanal metal posts. In 20 teeth, both complete (n 5 10) and incomplete (n 5 10) VRFs were created. Each tooth was scanned twice, with and without AR activation. The mean and variation of greyscale values, as well as CNR, were calculated for all images. Subsequently, an evaluator compared the amount of artefact (cupping, white streaks and dark bands) in all images. Five evaluators rated for VRF presence using a five-point scale.Results: Mean greyscale values and CNR were significantly decreased in images acquired with the AR. The usage of the algorithm promoted an overall reduction of image artefacts. Regarding the diagnosis of complete and incomplete VRFs, the use of the AR had an overall negative impact on specificity and accuracy. Conclusions: While indeed reducing artefact formation, the use of the AR, instead of improving the impact on the diagnosis of VRFs in teeth with intracanal metal posts, had a negative impact on the diagnosis.

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“…Algorithms within 3D imaging software were developed to reduce metal generated artefacts. One in vitro study found that an artefact reduction algorithm does not significantly correct the altered grey values in the vicinity of implants (Parsa et al 2014). Another study investigated the accuracy of CBCT images obtained with and without the use of artefact reduction modes in detecting simulated peri-implant defects (Kamburoglu et al 2013).…”

Section: Assessment Of Bone and Soft Tissuementioning

confidence: 99%

Novel digital imaging techniques to assess the outcome in oral rehabilitation with dental implants: a narrative review

Benić

Elmasry

Hämmerle

2015

Clinical Oral Implants Res

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Most of the digital imaging techniques have not yet sufficiently been validated to be used for outcome measures in implant dentistry. In clinical research, cone beam CT (CBCT) is increasingly being used for 3D assessment of bone and soft tissue following augmentation procedures and implant placement. Currently, there are no effective methods for the reduction of artifacts around implants in CBCT. Optical scanning is being used for the 3D assessment of changes in the soft tissue contour. The combination of optical scan with pre-operative CBCT allows the determination of the implant position and its spatial relation to anatomical structures. Spectrophotometry is the method most commonly used to objectively assess the color match of reconstructions and peri-implant mucosa to natural dentition and gingiva. New optical imaging techniques may be considered possible approaches for monitoring peri-implant soft tissue health. MRI and ultrasonography appear promising non-ionizing radiation imaging modalities for the assessment of soft tissue and bone defect morphologies. Optical scanners and OCT may represent efficient clinical methods for accurate assessment of the misfit between the reconstructions and the implants.

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Assessment of metal artefact reduction around dental titanium implants in cone beam CT

Abstract: The MAR tool in the software of the ORTHOPANTOMOGRAPH OP300 CBCT scanner does not significantly correct the voxel gray values affected by the metal artefact in the vicinity of an implant in human dry mandibles.

Cited by 50 publications

References 25 publications

Detection of peri‐implant bone defects with different radiographic techniques – a human cadaver study

Detection of peri‐implant bone defects with different radiographic techniques – a human cadaver study

Influence of the artefact reduction algorithm of Picasso Trio CBCT system on the diagnosis of vertical root fractures in teeth with metal posts

Novel digital imaging techniques to assess the outcome in oral rehabilitation with dental implants: a narrative review

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