Future prospects of zirconia for oral implants —A review

Yoshinari, Masao

doi:10.4012/dmj.2019-151

Cited by 39 publications

(34 citation statements)

References 47 publications

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“…It has been reported that it is possible to clean the prosthesis before it is placed in the oral cavity and activate its properties, and it is effective in improving the bond between zirconia and the resin adhesive [94]. By improving hydrophilicity, it also has the effect of improving cell adhesion, but there is a problem with the sustainability of this effect, and, if left in the air, it will return to its original state within a few days [95].…”

Section: Plasma Irradiationmentioning

confidence: 99%

Classification and Properties of Dental Zirconia as Implant Fixtures and Superstructures

Ban

2021

Materials

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Various types of zirconia are widely used for the fabrication of dental implant superstructures and fixtures. Zirconia–alumina composites, such as ATZ and NanoZR, are adequate for implant fixtures because they have excellent mechanical strength in spite of insufficient esthetic properties. On the other hand, yttria-stabilized zirconia has been used for implant superstructures because of sufficient esthetic properties. They are classified to 12 types with yttria content, monochromatic/polychromatic, uniform/hybrid composition, and monolayer/multilayer. Zirconia with a higher yttria content has higher translucency and lower mechanical strength. Fracture strength of superstructures strongly depends on the strength on the occlusal contact region. It suggests that adequate zirconia should be selected as the superstructure crown, depending on whether strength or esthetics is prioritized. Low temperature degradation of zirconia decreases with yttria content, but even 3Y zirconia has a sufficient durability in oral condition. Although zirconia is the hardest dental materials, zirconia restorative rarely subjects the antagonist teeth to occlusal wear when it is mirror polished. Furthermore, zirconia has less bacterial adhesion and better soft tissue adhesion when it is mirror polished. This indicates that zirconia has advantageous for implant superstructures. As implant fixtures, zirconia is required for surface modification to obtain osseointegration to bone. Various surface treatments, such as roughening, surface activation, and coating, has been developed and improved. It is concluded that an adequately selected zirconia is a suitable material as implant superstructures and fixtures because of mechanically, esthetically, and biologically excellent properties.

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Section: Plasma Irradiationmentioning

confidence: 99%

Classification and Properties of Dental Zirconia as Implant Fixtures and Superstructures

Ban

2021

Materials

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“…Some patients even develop metal hypersensitivity issues with titanium dental implants [9][10][11][12]. Nowadays, zirconia-based ceramics are considered as the most promising alternatives to titanium in dentistry because of their tooth-like color, excellent biocompatibility, and acceptable mechanical properties [13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Laser surface texturing of zirconia-based ceramics for dental applications: A review

Han

Zhang

Meerbeek

et al. 2021

Materials Science and Engineering: C

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“…They reported that both therapies were effective for short-time clinical improvements, but that a complete disease resolution was not achieved by these therapies. Yoshinari [63] suggested that modification with fluoride or antimicrobial peptide and/or atmospheric-pressure plasma irradiation will be useful for antimicrobial surface modifications of the zirconia implants. Further studies should be needed for cleaning the blastedHF+UV zirconia surface.…”

Section: Discussionmentioning

confidence: 99%

Surrounding Tissue Response to Surface-Treated Zirconia Implants

et al. 2019

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Yttria-stabilized tetragonal zirconia polycrystals (Y-TZP), which are partially stabilized zirconia, have been used for fabricating dental implants. This study investigated the soft tissue attachment, the collagen fiber orientation to zirconia at different surface conditions, and the bone response using implantation experiments in animals. The zirconia implant surfaces were treated with ultraviolet irradiation (UV), a combination of large-grit sandblasting and hydrofluoric acid etching (blastedHF), and a combination of blastedHF and UV (blastedHF+UV). The surface treated with blastedHF and blastedHF+UV appeared rough and hydrophilic. The surface treated with blastedHF+UV appeared to be superhydrophilic. Subsequently, tapered cylindrical zirconia implants were placed in the alveolar sockets of the maxillary molars of rats. The bone-to-implant contact ratio of blastedHF and blastedHF+UV implants was significantly higher than that of the non-treated controls and UV-treated implants. The four different surface-treated zirconia implants demonstrated tight soft tissue attachments. Perpendicularly oriented collagen fibers towards zirconia implants were more prominent in blastedHF and blastedHF+UV implants compared to the controls and UV-treated implants. The area of the soft tissue attachment was the greatest with the perpendicularly oriented collagen fibers of blastedHF+UV-treated implants. In conclusion, blastedHF+UV treatment could be beneficial for ensuring greater soft-tissue attachment for zirconia implants.

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Future prospects of zirconia for oral implants —A review

Cited by 39 publications

References 47 publications

Classification and Properties of Dental Zirconia as Implant Fixtures and Superstructures

Classification and Properties of Dental Zirconia as Implant Fixtures and Superstructures

Laser surface texturing of zirconia-based ceramics for dental applications: A review

Surrounding Tissue Response to Surface-Treated Zirconia Implants

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