Citation Information :
Lakhanpal S, Babu CS, Pandurangappa R, Mahaseth P, Pitti V, Anand D, Pasha FM. Peri-implant Stress Analysis of Immediate Loading and Progressive Loading Implants in Different Bone Densities (D2 and D3): A Finite Element Study. Int J Oral Implantol Clin Res 2014; 5 (1):1-7.
Aim: To analyze the peri-implant stress distribution in immediate loading and progressive loading implants in different bone densities (D2 and D3).
Materials and methods: A 3D finite element model of a mandibular section of the bone with a missing second premolar and a crown structure was used. Eighteen models were generated, eight were used for immediate loading and the remaining ten were of progressive loading. Of the eight models of immediate loading, four models each were used for D2 and D3 bone density types. Of the ten models used for progressive bone loading, five models each were used for D2 and D3 bone density types. A solid 4.2 × 10 mm screw type implant system (Replace Select RP, Nobel Biocare) was selected. The simulated crown consisted of metal coping of Nickel-Chromium alloy, porcelain and acrylic in few models. Axial and oblique loads were applied to the implant through the crown based on the loading protocols for immediate and progressive loading.
Results: Maximum stress was found in the cortical bone at the neck of the implant for both type of loading protocols except when there was no bone implant contact seen at initial stages of healing in immediate loading implants. Oblique occlusal forces show a significantly higher stress level as compared to axial loading forces.
Conclusion: Both loading conditions and bone density were found to be very important factor in the stress management in implant dentistry.
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