Ultimate force and stiffness of 2-piece zirconium dioxide implants with screw-retained monolithic lithium-disilicate reconstructions.

Joda, Tim Alexander; Voumard, Benjamin; Zysset, Philippe K.; Brägger, Urs; Ferrari, Marco (2018). Ultimate force and stiffness of 2-piece zirconium dioxide implants with screw-retained monolithic lithium-disilicate reconstructions. Journal of prosthodontic research, 62(2), pp. 258-263. Elsevier 10.1016/j.jpor.2017.11.002

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PURPOSE The aims were to analyze stiffness, ultimate force, and failure modes of a 2-piece zirconium dioxide (ZrO) implant system. METHODS Eleven 2-piece ZrO implants, each mounted with ZrO abutments plus bonded monolithic lithium disilicate (LS) restorations, were grouped for 3.3mm (A) and 4.1mm (B) diameter samples. Quasi-static load was monotonically applied under a standardized test set-up (loading configuration according to DIN ISO 14801). The ultimate force was defined as the maximum force that implants are able to carry out until fracture; stiffness was measured as the maximum slope during loading. An unpaired t-test was performed between group A and B for ultimate force and stiffness (p<0.05). RESULTS Force-displacement curves revealed statistically homogenous inner-group results for all samples. Failure modes showed characteristic fractures at the neck configuration of the implants independent of the diameter. Mean stiffness was 1099N/mm (±192) for group A, and significantly lower compared to group B with 1630N/mm (±274) (p<0.01); whereas mean ultimate force was 348N (±53) for group A, and significantly increased for group B with 684N (±29) (p<0.0001). CONCLUSIONS The examined 2-piece ZrO implant system mounted to LS-restorations seems to be a stable unit under in-vitro conditions with mechanical properties compared to loading capacity of physiological force. The metal-free implant reconstructions demonstrated high stiffness and ultimate force under quasi-static load for single tooth replacement under consideration of the dental indication of narrow and standard diameter implants.

Item Type:

Journal Article (Original Article)


04 Faculty of Medicine > Pre-clinic Human Medicine > Institute for Surgical Technology & Biomechanics ISTB [discontinued]
04 Faculty of Medicine > School of Dental Medicine > Department of Reconstructive Dentistry and Gerodontology

UniBE Contributor:

Joda, Tim Alexander; Voumard, Benjamin; Zysset, Philippe and Brägger, Urs


500 Science > 570 Life sciences; biology
600 Technology > 610 Medicine & health
600 Technology








Vanda Kummer

Date Deposited:

18 Jan 2019 09:07

Last Modified:

09 Nov 2019 03:07

Publisher DOI:


PubMed ID:


Uncontrolled Keywords:

DIN ISO 14801 Dental implants Failure mode Lithium disilicate (LS(2)) Zirconium dioxide (ZrO(2))





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