PURPOSE: The effect of stress levels and distributions around the internal nonsubmerged type implants after vertical bone resorption was investigated in this study. MATERIALS AND METHODS: An HSII implant was placed in 4 cylindrical alveolar bone models with differing degrees of thread exposures. The load applied to each implant was von Mises stress and principal stress, 250 N in axial direction and 30 degrees lateral pressure. The difference in the load between the bone and the connective portion of the implant was obtained using ANSYS analysis. RESULTS: Bone loss in the cervical area of the implant was more obvious under lateral pressure. When more threads were exposed, bone level decreased and the maximum load applied on the fixture increased. CONCLUSIONS: It was concluded that higher bone level has a biomechanical advantage with respect to stress concentration.
PURPOSE: The effect of stress levels and distributions around the internal nonsubmerged type implants after vertical bone resorption was investigated in this study. MATERIALS AND METHODS: An HSII implant was placed in 4 cylindrical alveolar bone models with differing degrees of thread exposures. The load applied to each implant was von Mises stress and principal stress, 250 N in axial direction and 30 degrees lateral pressure. The difference in the load between the bone and the connective portion of the implant was obtained using ANSYS analysis. RESULTS: Bone loss in the cervical area of the implant was more obvious under lateral pressure. When more threads were exposed, bone level decreased and the maximum load applied on the fixture increased. CONCLUSIONS: It was concluded that higher bone level has a biomechanical advantage with respect to stress concentration.