Artefacts in multimodal imaging of titanium, zirconium and binary titanium–zirconium alloy dental implants: anin vitrostudy

Abstract

MRI allows for an excellent image contrast and limited artefacts in patients with zirconium implants. CT and CBCT examinations are less affected by artefacts from titanium and titanium-zirconium alloy implants compared with MRI. The knowledge about differences of artefacts through different implant materials and image modalities might help support clinical decisions for the choice of implant material or imaging device in the clinical setting.

Effect of anatomical region on the formation of metal artefacts produced by dental implants in cone beam computed tomographic images

“…3,4,6,8 The presence of adjacent anatomical structures, such as the skull and spinal column, affects grey value measurements in the maxilla and mandible. 4,9 In the present study, a greater number of artefacts was observed in the dental implant's cervical third, likely due to the presence of the prosthesis over the implant. Titanium, the implant's constituent metal, has a smaller atomic number 4,9 than prosthetic crown alloy materials, such as cobalt-chromium.…”

“…[4][5][6][7] Owing to its capacity to provide three-dimensional information, CBCT provides high image quality, diagnostic accuracy and linear measurement precision, thus increasing dental implant installation safety and treatment success rates. 2,3,[5][6][7][8][9] However, in the post-surgical follow-up phase, metal artefacts form inside the field of view (FOV), affecting tomographic image quality, [1][2][3][4][5][6][9][10][11] affecting, e.g. the visibility of fenestrations and peri-implant dehiscence.…”

“…2,6,10 These artefacts tend to cause excessive variation in grey values near the metal structure, 3 affecting image quality and making it difficult to evaluate osseointegration and inflammatory processes near the implants. 4,7,9,15 Some studies suggest that the formation of metal artefacts can be affected by anatomical region, the position of the object within the FOV and the adjacent anatomical structures outside of the FOV, 7,8 but there is no consensus regarding which regions (maxilla or mandible, anterior or posterior) are more involved in the formation of artefacts or what the effects of the object's location within the FOV are. Thus, the aim of this study was to use CBCT images to quantify the formation of metal artefacts produced by titanium dental implants installed in different maxillomandibular regions.…”

The Effects of Promax Artefact Reduction Algorithm on Artefacts Induced by Titanium and Zirconium Implants

“…Öte yandan literatürde Zr implantların neden olduğu artefaktlara ve Zr ile Ti implant artefaktlarının karşılaştırılmasına dair kısıtlı sayıda çalışma bulunmaktadır. 7,12,13 Bu çalışmanın amacı, farklı görüntü elde etme para- 12 , Ti ve Zr implantların KIBT'de benzer artefakt oluşturma biçimleri olduğunu rapor etmişlerdir. Bunun aksine Sancho-Puchades ve ark.…”

Custom design and biomechanical analysis of 3D-printed PEEK rib prostheses

“…As a result of the significant differences in elastic modulus or toughness between titanium rib implants and real human ribs, the stress distributions of the rib skeleton will be changed after a rib cage replacement, and a non-uniform load transmission may cause damage to the surrounding organs under certain unique circumstances, including a tumble or slight impact. Moreover, titanium has a limitation with regard to post-operative imaging examinations owing to the presence of artefacts (Smeets et al 2017). Unfortunately, some patients may feel abnormal symptoms near the replacement location when titanium alloy is used (Fage et al 2016).…”