Annals of biomedical engineering · 2026
Turning-Point Impact Compromises the Biomechanical Integrity of Cortical Bone During Oscillating Sawing.
СтатьяНазвание и аннотация: Перевод пока не подготовлен
Обработка статьи · этапы, ошибки и управление
Загрузка состояния…
Ошибки и ограничения
История · было → стало
Состояние обновляется каждые 5 секунд, пока блок открыт. Процент показывается только там, где известен объём работы. Пауза останавливает продолжение этапа; текущий запрос к источнику может завершиться.
Wang Han, Satake Urara, Enomoto Toshiyuki
Аннотация
PURPOSE: Oscillating bone sawing is widely used in orthopedic surgery, where preserving the mechanical integrity of the prepared bone surface is essential for implant stability. However, the influence of turning-point impacts on the biomechanical integrity of the prepared bone surface remains unclear. This study aimed to quantify the effects of turning-point impacts on surface integrity and the mechanical properties of cortical bone.
METHODS: Oscillating sawing experiments were performed on bovine cortical bone using conventional and optimized trajectories. Dynamic sawing forces were measured to quantify turning-point impact events. Surface damage was characterized by scanning electron microscopy and digital microscopy. Local and global mechanical properties were evaluated by flat-punch and conventional compression tests, respectively.
RESULTS: The conventional trajectory generated pronounced turning-point impact forces, accompanied by extensive surface cracks and breakout defects. In contrast, the optimized trajectory significantly suppressed turning-point impact forces (p < 0.001) and preserved groove wall surface integrity. Consequently, both the local (p < 0.001) and global (p = 0.001) compressive strengths increased, whereas the elastic modulus remained unchanged. These findings indicate that turning-point impacts primarily reduce failure strength by introducing localized microstructural defects while largely preserving bulk elastic stiffness.
CONCLUSION: Turning-point impacts compromise the biomechanical integrity of cortical bone by reducing the load-bearing capacity of implant-relevant bone surfaces. Suppressing these transient impacts helps preserve implant-relevant bone surface integrity and may improve the stability of the bone-implant interface. These findings provide a biomechanical basis for future real-time impact monitoring and adaptive control in surgical robotics to prevent impact-induced damage.
METHODS: Oscillating sawing experiments were performed on bovine cortical bone using conventional and optimized trajectories. Dynamic sawing forces were measured to quantify turning-point impact events. Surface damage was characterized by scanning electron microscopy and digital microscopy. Local and global mechanical properties were evaluated by flat-punch and conventional compression tests, respectively.
RESULTS: The conventional trajectory generated pronounced turning-point impact forces, accompanied by extensive surface cracks and breakout defects. In contrast, the optimized trajectory significantly suppressed turning-point impact forces (p < 0.001) and preserved groove wall surface integrity. Consequently, both the local (p < 0.001) and global (p = 0.001) compressive strengths increased, whereas the elastic modulus remained unchanged. These findings indicate that turning-point impacts primarily reduce failure strength by introducing localized microstructural defects while largely preserving bulk elastic stiffness.
CONCLUSION: Turning-point impacts compromise the biomechanical integrity of cortical bone by reducing the load-bearing capacity of implant-relevant bone surfaces. Suppressing these transient impacts helps preserve implant-relevant bone surface integrity and may improve the stability of the bone-implant interface. These findings provide a biomechanical basis for future real-time impact monitoring and adaptive control in surgical robotics to prevent impact-induced damage.