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Materials and Method: Sixty-four implants received titanium (group Ti) and zirconia abutments (groups Zr-8, Zr-18, and Zr-1). The abutments of group Zr-8 had a 0.8-mm wall thickness, whereas the wall thickness of group Zr-18 was reduced by preparation from 1�mm to 0.8�mm. The abutments of group Zr-1 had a wall thickness of 1�mm. Standardized maxillary central incisor metal crowns were cemented on all abutments. All specimens were then tested in a universal testing machine for their resistance to fracture before and after masticatory simulation (n??). Results: The median resistance to fracture values (N) before and after aging were, respectively: group Ti: 500�C504; group Zr-8: 487�C491; group Zr-18: 490-451; [http://www.selleckchem.com/products/Adriamycin.html Doxorubicin molecular weight] and group Zr-1: 519-480. No significant effects of group, aging, or combinations were found (p?>?.05). Conclusion: [http://www.selleckchem.com/products/obeticholic-acid.html Obeticholic Acid price] All tested abutments have the potential to withstand physiologic occlusal forces in the anterior region (>200?N). The applicability of the results to other implant systems should be verified. ""Purpose: This study aimed to investigate whether push-in and pull-out tests measure mechanical properties of the bone�Cimplant interface differently, and which test is more sensitive to changes over the healing period. Materials and Methods: Two identical self-threading dental implants (3.3?��?8.5?mm) were placed in medial surface of the proximal condyles of left and right tibias of 20 rabbits (40 implants total). Five rabbits each were sacrificed after 1, 4, 8, and 12 weeks of healing. Push-in test was performed on one side's tibia implant and pull-out on the other side's implant, at a rate of 6?mm/min. Primary and secondary implant stabilities and tibia weight were measured on all implants. Results: The push-in test generated significantly higher failure load (p?=?.0001; 530?N vs 279?N), lower displacement at failure (p?=?.0003; 0.436?mm vs 0.680?mm), and higher interface stiffness (p?[http://en.wikipedia.org/wiki/FARP1 FARP1] load, stiffness, and secondary implant stability were significantly higher for longer compared with shorter healing periods, while displacement, tibia weight, and primary stability were not. Failure load and stiffness differed significantly for four healing times for the push-in but not for the pull-out test. Failure load was significantly correlated with secondary implant stability for both push-in (r?=?0.66) and pull-out (r?=?0.48) tests, but stiffness was significantly correlated with secondary stability only for the push-in test (r?=?0.72; pull-out test r?=?0.40). Conclusion: The push-in test appeared more sensitive than pull-out to changes in mechanical properties at bone�Cimplant interfaces during healing in rabbit tibia model.