Improvements of material removal in cortical bone via impact cutting method

Bai, Wei; Shu, Liming; Sun, Ronglei; Xu, Jianfeng; Silberschmidt, Vadim V.; Sugita, Naohiko

doi:10.1016/j.jmbbm.2020.103791

Cited by 12 publications

(8 citation statements)

References 30 publications

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“…Based on the fracture characteristics of bone tissue, this study innovatively proposed a twodimensional elliptical vibration cutting method and verified the effectiveness of this process from the perspective of tissue fracture and cutting force. Although our previous study found that the main cutting force could be reduced by 70% using 1D vibration cutting, which was based on experimental results under high frequency vibration conditions [43]. However, it should be also mentioned that the frequency of the proposed EVC device was only 200 Hz, which limited the cutting speed and efficiency when bone cutting was performed.…”

Section: Discussionmentioning

confidence: 92%

“…Shu and Sugita [41] also found that the vibration promotes upward crack propagation. In addition, the vibration of the tool might change the fracture toughness of cortical bone during vibration-assisted cutting [27], which resulted in the crack penetrated the osteons directly instead of deflection. These reasons might lead to the fracture propagation in the shear direction and change the chip morphology.…”

Section: Mechanism Of the Materials Removal In Evc Of Cortical Bonementioning

confidence: 99%

“…Sugita et al [26] proposed a cutting method utilizing impacts by vibration and results indicated with which the principal cutting force decreased by more than 80% in each cutting direction. Bai et al [27] investigated a high-frequency impact cutting method, and its effect on fracture propagation, chip formation, and cutting forces was studied for orthogonal cutting.…”

Section: Introductionmentioning

confidence: 99%

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Experimental investigation of material removal in elliptical vibration cutting of cortical bone

bai

Zhai

Zhao

et al. 2022

Preprint

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To benefit the tissue removal and postoperative rehabilitation, the increased efficiency and accuracy and the reduced operating force are strongly required in osteotomy. A novel elliptical vibration cutting (EVC) has been introduced for the bone cutting compared with the conventional cutting (CC) in this paper. With the assistance of the high-speed micrcope imaging and the dynamometer, the material removals of cortical bone and their cutting forces from two cutting regimes were recorded and analysed comprehensively, which clearly demonstrated the chip morphology improvement and the average cutting force reduction in the EVC process. It also revealed that the elliptical vibration of the cutting tool could promote the fracture propagation along the shear direction. These new findings will be of important theoretical and practical values to apply the innovative EVC process to the surgical procedures of osteotomy.

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Section: Discussionmentioning

confidence: 92%

Section: Mechanism Of the Materials Removal In Evc Of Cortical Bonementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Experimental investigation of material removal in elliptical vibration cutting of cortical bone

bai

Zhai

Zhao

et al. 2022

Preprint

Self Cite

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show abstract

“…Sugita et al [26] proposed a cutting method utilizing impacts by vibration and results indicated with the principal cutting force decreased by more than 80% in each cutting direction. Bai et al [27] investigated a high-frequency impact cutting method, and its effects on fracture propagation, chip formation, and cutting forces were studied for orthogonal cutting. Experimental results showed that the cutting-induced fractures expanded along the main shear direction, generating small pieces of triangular segmented chips in impact cutting.…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation of Material Removal in Elliptical Vibration Cutting of Cortical Bone

Bai

Zhai

Zhao

et al. 2023

Chin. J. Mech. Eng.

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To benefit tissue removal and postoperative rehabilitation, increased efficiency and accuracy and reduced operating force are strongly required in the osteotomy. A novel elliptical vibration cutting (EVC) has been introduced for bone cutting compared with conventional cutting (CC) in this paper. With the assistance of high-speed microscope imaging and the dynamometer, the material removals of cortical bone and their cutting forces from two cutting regimes were recorded and analysed comprehensively, which clearly demonstrated the chip morphology improvement and the average cutting force reduction in the EVC process. It also revealed that the elliptical vibration of the cutting tool could promote fracture propagation along the shear direction. These new findings will be of important theoretical and practical values to apply the innovative EVC process to the surgical procedures of the osteotomy.

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“…Limited works were reported on the investigation of fracture toughness of cortical bones in orthogonal cutting: Feldmann et al [9] presented a bone fracture toughness model when the bone material was cut in a perpendicularly. Bai et al [15] compared the bone fractures in conventional and impact cutting and found that the impact cutting was able to reduce the fracture toughness of bones; their conclusions were based on the assumption that the cutting direction was in one of three orthogonal directions. How to affect fracture toughness in an arbitrary direction was not covered.…”

Section: Introductionmentioning

confidence: 99%

The cutting behavior of cortical bone in different bone osten cutting angles and depths of cut

Luo

Ren

Shu

et al. 2021

Preprint

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Cortical bones are semi-brittle and anisotropic, this brings the challenge to suppress vibration and avoid undesired fracture in precise cutting processes in surgeries. In this paper, we proposed a novel analytical model to represent cutting processes of cortical bones, and we used to evaluate cutting forces and fracture toughness, and investigate the formations of chips and cracks under varying bone osteon cutting angles and depths. To validate the proposed model, the experiments are conducted on orthogonal cuttings over cortical bones to investigate the impact of bone osteon cutting angle and depth on cutting force, crack initialization and growth, and fracture toughness of cortical bone microstructure. The experimental results highly agreed with the prediction by the proposed model in sense that (1) curly, serrated, grainy and powdery chips were formed when the cutting angle was set as 0°, 60°, 90°, and 120°, respectively. (2) Bone materials were removed dominantly by shearing at a small depth of cut from 10 to 50 µm, and by a mixture of pealing, shearing, and bending at a large depth of cut over 100 µm at different cutting orientations. Moreover, it was found that a cutting path along the direction of crack initialization and propagation benefited to suppress the fluctuation of cutting force thus reduce the vibration. The presented model has theoretical and practical significance in optimizing cutting tools and operational parameters in surgeries.

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Improvements of material removal in cortical bone via impact cutting method

Cited by 12 publications

References 30 publications

Experimental investigation of material removal in elliptical vibration cutting of cortical bone

Experimental investigation of material removal in elliptical vibration cutting of cortical bone

Experimental Investigation of Material Removal in Elliptical Vibration Cutting of Cortical Bone

The cutting behavior of cortical bone in different bone osten cutting angles and depths of cut

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