Journal of Prosthodontics News  

Fracture Resistance Behaviors of Titanium-Zirconium and Zirconia Implants


Now online in the Journal of Prosthodontics, a new study co-authored by three ACP members, Drs. Kamolphob Phasuk, Dean Morton, and Wei-Shao Lin.

Their study evaluated the fracture resistance behaviors of titanium-zirconium, one-piece zirconia, and two-piece zirconia implants restored by zirconia crowns and different combinations of abutment materials (zirconia and titanium) and retention modes (cement-retained and screw-retained zirconia crowns).

Specimens were divided into 3 research groups. Implants were inserted into specimen holders made of epoxy resin-glass fiber composite and all specimens were then subject to artificial aging for 90 days. Fracture resistance of specimen assemblies was tested under static compression load using a universal testing machine.

The control group, titanium-zirconium (TTC), showed significantly higher peak fracture loads than the one-piece zirconia (ZZC) and two-piece zirconia implants (ZTS).

Overall, cement-retained zirconia crowns supported by titanium-zirconium implants and prefabricated titanium abutments showed superior peak fracture loads and better survival probability behavior. Catastrophic failures, with implant fractures at the embedding level or slightly below, were only observed in the ZZC and ZTS groups. Titanium-zirconium and zirconia implants could withstand average intraoral mastication loads in the incisor region.

Hanes B, Feitosa S, Phasuk K, et al. Fracture resistance behaviors of titanium-zirconium and zirconia implants. J Prosthodont 2021; https://doi.org/10.1111/jopr.13440


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