Failure analysis of fractured dental zirconia implants

Gahlert, Michael; Burtscher, Dois; Grunert, Ingrid; Kniha, Heinz; Steinhauser, E.

doi:10.1111/j.1600-0501.2011.02206.x

Cited by 81 publications

(84 citation statements)

References 21 publications

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“…The clinical study by Dahlert et al agreed with this finding [43]. They reported that the fracture rate of one-piece zirconia implants was nearly 10%, where 13 of 170 inserted implants fractured with an average in situ period of 36.75 ± 5.34 months.…”

Section: Implant Loss and Fracturesupporting

confidence: 77%

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Zirconia ceramics in metal-free implant dentistry

Han

Zhao

Shen

2016

Advances in Applied Ceramics

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Because of their outstanding mechanical properties, chemical stability, and biocompatibility, 3-mol % yttria-stabilised tetragonal zirconia polycrystals (3Y-TZP), known as zirconia ceramics in dentistry, are an important choice for various types of prosthesis. In addition to extensive use for crown and bridge construction, considerable interest has been generated for applications in implant dentistry, including full-contour zirconia crowns as supra-constructions, zirconia abutments, and novel zirconia implants. However, their use among dentist and researchers is controversial, especially compared with the well-established implants made of titanium alloys. As a latecomer, the merits and limitations of 3Y-TZP are awaiting careful investigation. Design, manufacturing, and clinical operation guidelines are urgently needed. The aim of this review was to address the present status of the application of zirconia ceramics related to implant dentistry by analysing the published data from both in vitro and in vivo studies. Suggestions are provided for potential improvements and suitable applications of zirconia ceramics in metal-free implant dentistry. ARTICLE HISTORY

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Section: Implant Loss and Fracturesupporting

confidence: 77%

“…Zirconia is strong under compressive stress, but it is sensitive to shear and tensile stresses. The greater the angle between the biting force direction and the implant axis, the greater the shear stresses and an enhanced risk of zirconia implant fracture [41][42][43].…”

Section: Implant Loss and Fracturementioning

confidence: 99%

Zirconia ceramics in metal-free implant dentistry

Han

Zhao

Shen

2016

Advances in Applied Ceramics

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“…Therefore, fracture can be a problem. Gahlert et al analyzed fractured zirconia dental implants and found that approximately 10% of the implants were fractured 36.75 months after prosthetic loading 33) . The causes of fracture were the use of implant bodies with a small diameter and occlusal overloading.…”

Section: Discussionmentioning

confidence: 99%

Zirconia Implants with Laser Surface Treatment: Peri-Implant Bone Response and Enhancement of Osseointegration

Yasuno

Kakura

Taniguchi

et al. 2014

J. Hard Tissue Biology.

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The aim of this study was to prepare zirconia implants with laser-modified surfaces and to evaluate peri-implant tissue response and osseointegration in an animal study. The experimental zirconia implants received one of the following surface treatments and were placed in the tibiae of SD rats: vertical irradiation with a fiber laser (vertical fiber laser), horizontal irradiation with a fiber laser (horizontal fiber laser), vertical irradiation with a Neodymium-doped yttrium orthovanadate (YVO4) laser (vertical YVO4 laser), and horizontal irradiation with a YVO4 laser (horizontal YVO4 laser). The control implants were smooth surfaced. Tibiae with implant bodies were collected 28 days after implant placement, and removal torque values were measured. Tissue sections were prepared for light microscopy, and the bone-implant contact (BIC) ratio and the peri-implant bone area (BA) were measured. The vertical fiber-laser implants had a mean BIC that was significantly higher than other implants. The mean BIC of the vertical fiber-laser implants was approximately 4.2 folds of the value of the control implants on the cortical bone side and approximately 2.7 folds of the value of the control implants on the bone marrow side. The mean BA was significantly higher in the vertical YVO4-laser implants. The vertical fiber-laser implants had a mean torque removal value that was approximately 2.4 folds of the value of the control implants and approximately double of the value of the vertical or horizontal YVO4-laser implants. The horizontal fiber-laser implants had a mean removal torque value that was approximately double of the value of the control implants and approximately 1.7 folds of the value of the vertical or horizontal YVO4-laser implants (p<0.05). Both types of lasers were useful in implant surface treatment to enhance osseointegration of zirconia implants.

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“…In the present study although intraoral grinding was performed for case 1 and 2, any implant fracture was not observed during approximately 6 year follow-up. 27 One-piece implants generally require soft tissue formation after insertion due to their submucosally submerged prosthetic platform. An immediate provisionalization is recommended for one-piece zirconia implants.…”

Section: Figurementioning

confidence: 99%