Translational research on clinically failed zirconia implants

Scherrer, Susanne S.; Mekki, Mustapha; Crottaz, Claude; Gahlert, Michael; Romelli, Eric; Marger, Laurine; Durual, Stéphane; Vittecoq, Eric

doi:10.1016/j.dental.2018.11.033

Cited by 25 publications

(44 citation statements)

References 40 publications

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“…The tetragonal to monoclinic phase transformation is known to induce shear through micro-scale twinning [58,59] and TEM studies of interfaces within YPSZ solid oxide fuel cells have shown very similar features at locations where the tetragonal to monoclinic phase transformation is induced [60,61]. This highly localised transformation is characteristic of a boundary level effect which is similar to those observed at other interfaces within the literature [62,63].…”

Section: Monoclinic Ypsz Phase Distributionsupporting

confidence: 62%

Investigations into the interface failure of yttria partially stabilised zirconia - porcelain dental prostheses through microscale residual stress and phase quantification

et al. 2019

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Highlights  Residual stress and phase analysis at the microscale at interface and coping edge  X-ray diffraction and Raman spectroscopy show comparable results  Cross validation using ring-core focused ion beam and digital image correlation  Monoclinic and highly stressed regions identified close to interface  Phase transformation volumetric expansion is the origin of porcelain failure

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Section: Monoclinic Ypsz Phase Distributionsupporting

confidence: 62%

Investigations into the interface failure of yttria partially stabilised zirconia - porcelain dental prostheses through microscale residual stress and phase quantification

et al. 2019

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“…Yet, reliable mechanical characterization, especially by means of fracture toughness (KIc) testing, is still in shortage [6]. More so for new, high-yttria content 'translucent' zirconias, despite the explosive trend of prescribing zirconias as monolithic constructs in clinical dentistry [9]. Dental zirconias are mostly delivered as intermediate pre-sintered "white-bodies", produced by powder compaction and long duration sintering at low-temperatures (900-1000 °C), i.e.…”

Section: Introductionmentioning

confidence: 99%

A Revised Relationship Between Fracture Toughness and Y2O3 Content in Modern Dental Zirconias

Belli

Hurle²,

Schürrlein³

et al. 2021

Preprint

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The relationship between fracture toughness and Yttria content in modern zirconia ceramics was revised. For that purpose, we evaluated here 10 modern Y2O3-stabilized zirconia (YSZ) materials currently used in biomedical applications, namely prosthetic and implant dentistry. The most relevant range between 2-5 mol% Y2O3 was addressed by selecting from conventional opaque 3 mol% YSZ up to more translucent compositions (4-5 mol% YSZs). A technical 2YSZ was used to extend the range of our evaluation. The bulk mol% Y2O3 concentration was measured by X-Ray Fluorescence Spectroscopy. Phase quantification by Rietveld refinement are supplied by considering only two tetragonal phases or an additional improbable cubic phase. A first-account of the fracture toughness (KIc) of the partly-sintered materials is given, which amounted to 0.4 – 0.7 MPaÖm. In the fully-densified state, an inverse power-law behavior was obtained between KIc and bulk mol% Y2O3 content, whether using only our measurements or including literature data, challenging some established relationships.

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“…Both studies agreed that the diameter-reduced implants of less than 3.6 mm were not suitable for clinical use [22]. Consequently, a modified design of 3.6 mm has now been introduced, with its application limited to the anterior incisor region of both maxillary and mandibular dentition [22].…”

Section: Discussionmentioning

confidence: 93%

“…The eligible articles were all in vivo or ex vivo studies, with one study categorized as a Randomized Control Trial (Paolantoni, et al) [ 20 ] whilst the remaining two were both Cohort studies (Roehling and Scherrer, et al) [ 21 , 22 ]. Classifying the included articles based on their study designs allowed for adequate analysis of the fracture resistance in one- and two-piece zirconia implants placed within the anterior region.…”

Section: Resultsmentioning

confidence: 99%

“…The quality and risk of bias assessments for the three articles included in the review were carried out using the appraisal tool created by JBI SUMARI [ 19 , 23 ], and findings are presented in Table 1 and Table 2 . The study by Roehling et al [ 21 ] was deemed to have low bias, while articles from Scherrer et al [ 15 , 22 ] and Paolantoni et al [ 20 ] were found to have a high level of bias. The level of bias for each article was determined by the JBI SUMARI appraisal tool [ 23 ].…”

Section: Resultsmentioning

confidence: 99%

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Mechanical Factors Implicated in Zirconia Implant Fracture Placed within the Anterior Region—A Systematic Review

et al. 2022

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Background: To analyze the fracture resistance of zirconia implants within the anterior region and evaluate whether zirconia–zirconia implants can be a viable alternative to titanium implants. Methods: Four online databases (Cochrane Library, Ovid, PubMed, and Scopus) were searched for the period of January 2011 to July 2021. All studies that analyzed the in vivo clinical outcome of two-piece implants in the anterior region in English language were included. Results: The search strategy identified 242 studies. Of these studies, three studies were included for qualitative synthesis based on the pre-determined eligibility criteria. The results showed that there is significant difference in biological results, fractal behavior and other complications between one-piece and two-piece zirconia implants. Two-piece zirconia implants demonstrated favorable longevity and success rates within anterior maxillary in short-term trials. Conclusions: Although factors involved in fractures have been identified—sandblasting, implant diameter, occlusal load, age and implant coating—there is limited quantitative assessment to gauge the fracture resistance of two-piece zirconia implants. Hence, further research with long-term clinical evidence is required.

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Translational research on clinically failed zirconia implants

Cited by 25 publications

References 40 publications

Investigations into the interface failure of yttria partially stabilised zirconia - porcelain dental prostheses through microscale residual stress and phase quantification

Investigations into the interface failure of yttria partially stabilised zirconia - porcelain dental prostheses through microscale residual stress and phase quantification

A Revised Relationship Between Fracture Toughness and Y2O3 Content in Modern Dental Zirconias

Mechanical Factors Implicated in Zirconia Implant Fracture Placed within the Anterior Region—A Systematic Review

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