بررسي اثر كامل نبودن پيوند استخواني در ايمپلنت دندان تحت بارگذاري ديناميكي به كمك شبيه‌سازي اجزاي ‌محدود

Replacing lost teeth has long been one of human needs, an‎d the absence of teeth leads to jawbone an‎d gum resorption, facial deformation, speech problems, difficulties in chewing an‎d eating, an‎d changes in the position of other teeth. Dental implants are the best method for replacing missing teeth. When a dental implant is placed in the jaw, the surrounding bone grows an‎d the implant becomes connected to the jawbone through osseointegration. However, this bond between the bone an‎d the implant does not always occur completely, which affects the amount of stress in the implant an‎d the bone. In this analysis, using the finite element method, a section of the jawbone was considered an‎d two jawbone models were simulated. One model had D2-type bone an‎d the other had D3-type bone, an‎d the properties of the bones were considered orthotropic. Then, the implant was placed inside the jaw an‎d forces resulting from chewing were applied to it. Chewing applies cyclic forces to the implant, an‎d proposed patterns for simulating the chewing process were compared with each other. After selec‎ting a suitable loading pattern, stress values in the implant an‎d bone under dynamic loading were obtained for different percentages of osseointegration. The stress level in D3 bone is higher than in D2 bone, an‎d as the thickness of the cortical bone in the jaw decreases, stress values in both the implant an‎d bone increase. Stress levels in the implant an‎d bone also increase with greater percentages of osseointegration. Strain values in D3 bone are higher than in D2 bone, an‎d the cancellous bone shows the greatest amount of strain. Strain values increase as the percentage of osseointegration decreases.

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