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On the material dependency of peri-implant morphology and stability in healing bone

Bioactive Materials 2023年第10期28卷 155-166页

作者： Stefan Bruns Diana Krüger Silvia Galli D.C.Florian Wieland Jorg U.Hammel Felix Beckmann Ann Wennerberg Regine Willumeit-Romer Berit Zeller-Plumhoff Julian Moosmann Institute of Metallic Biomaterials Helmholtz-Zentrum HereonMax-Planck-Str.121502GeesthachtGermany University of Malmo Faculty of OdontologyDepartment of ProsthodonticsCarl Gustafs Vag 34Klerken20506MalmoSweden Institute of Materials Physics Helmholtz-Zentrum HereonMax-Planck-Str.121502GeesthachtGermany University of Gothenburg Institute of OdontologyDepartment of ProsthodonticsMedicinaregatan 12 f41390GoteborgSweden

The microstructural architecture of remodeled bone in the peri-implant region of screw implants plays a vital role in the distribution of strain energy and implant *** present a study in which screw implants made from titanium,polyetheretherketone and biodegradable magnesium-gadolinium alloys were implanted into rat tibia and subjected to a push-out test four,eight and twelve weeks after *** were 4 mm in length and with an M2 *** loading experiment was accompanied by simultaneous three-dimensional imaging using synchrotron-radiation microcomputed tomography at 5μm *** deformation and strains were tracked by applying optical flow-based digital volume correlation to the recorded image *** stabilities measured for screws of biodegradable alloys were comparable to pins whereas non-degradable biomaterials experienced additional mechanical ***-implant bone morphology and strain transfer from the loaded implant site depended heavily on the biomaterial *** implants stimulated rapid callus formation displaying a consistent monomodal strain profile whereas the bone volume fraction in the vicinity of magnesium-gadolinium alloys exhibited a minimum close to the interface of the implant and less ordered strain *** in our data suggest that implant stability benefits from disparate bone morphological properties depending on the biomaterial *** leaves the choice of biomaterial as situational depending on local tissue properties.

关键词： Biodegradable implant materials Bone mechanical testing Implant stability synchrotron micro-computed tomography imaging Digital volume correlation

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