Future Dental Journal


Aim this in vitro study was conducted to evaluate the effect of mechanical loading on different implant materials on supporting structures materials and methods: a total of three implant retained overdentures were used in this study, retained by two implants each (Titanium, polyetheretherketon and zirconia) were placed in epoxy resin casts at the canine area using a surgical guide. Soft liner material was used at the distal extension area to mimic the soft tissues. Two linear strain gauges were bonded buccal and lingual to each implant to measure the peri-implant strains during unilateral and bilateral loading. Results: during bilateral loading the highest strain values were recorded with the PEEK implants, while the lowest strain values were recorded with the zirconia implants. During unilateral loading, the highest strain values in the loading side were also demonstrated with the PEEK implants, and the lowest strain values were observed with the zirconia implants.Conclusion: within the limitations of this in vitro study, PEEK implants were found to transmit more occlusal stresses at the marginal bone area than titanium and zirconia implants, thus PEEK implants avoid stress shielding phenomenon and its subsequent disuse atrophy of bone



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