Experimental Study on the Effect of Point Angle on Force and Temperature in Ultrasonically Assisted Bone Drilling

Alam, Khurshid; Ghodsi, Mojtaba; Al-Shabibi, Abdullah M.; Silberschmidt, Vadim V.

doi:10.1007/s40846-017-0291-8

Cited by 23 publications

(9 citation statements)

References 29 publications

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“…This finding was later supported by other researchers. 27,28 Conversely, Augustin et al 29 revealed that no significant difference in terms of bone temperature elevation when drill bit of 80°, 100° and 120° point angle were used in drilling of porcine femur. Hillery and Shuaib 30 also demonstrated no variation in temperature when drill bits with 70°, 80° and 90° point angle were used in drilling of bovine and human bone.…”

Section: Introductionmentioning

confidence: 99%

Drilling of bone: Effect of drill bit geometries on thermal osteonecrosis risk regions

Akhbar

Yusoff

2018

Proc Inst Mech Eng H

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Bone-drilling operation necessitates an accurate and efficient surgical drill bit to minimize thermal damage to the bone. This article provides a methodology for predicting the bone temperature elevation during surgical bone drilling and to gain a better understanding on the influences of the point angle, helix angle and web thickness of the drill bit. The proposed approach utilized the normalized Cockroft-Latham damage criterion to predict material cracking in the drilling process. Drilling simulation software DEFORM-3D is used to approximate the bone temperature elevation corresponding to different drill bit geometries. To validate the simulation results, bone temperature elevations were evaluated by comparison with ex vivo bone-drilling process using bovine femurs. The computational results fit well with the ex vivo experiments with respect to different drill geometries. All the investigated drill bit geometries significantly affect bone temperature rise. It is discovered that the thermal osteonecrosis risk regions could be reduced with a point angle of 110°to 140°, a helix angle of 5°to 30°and a web thickness of 5% to 40%. The drilling simulation could accurately estimate the maximum bone temperature elevation for various surgical drill bit point angles, web thickness and helix angles. Looking into the future, this work will lead to the research and redesign of the optimum surgical drill bit to minimize thermal insult during bone-drilling surgeries.

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Section: Introductionmentioning

confidence: 99%

Drilling of bone: Effect of drill bit geometries on thermal osteonecrosis risk regions

Akhbar

Yusoff

2018

Proc Inst Mech Eng H

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“…88,167,175,176 Others discovered a significant influence of point angle on bone damage, but the findings are contradictory. For example, the first group unveiled that a larger point angle increases bone temperature 10,21,102,115,123,147,162,167,175,176 and force. 10,21,68,167,174,189 Contrastingly, others found a decrease in heat generation, 5,13,40,133 force, 133 and torque 68,174 with point angle.…”

Section: Point Anglementioning

confidence: 99%

Surgical Drill Bit Design and Thermomechanical Damage in Bone Drilling: A Review

Akhbar

Sulong

2020

Ann Biomed Eng

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As drilling generates substantial bone thermomechanical damage due to inappropriate cutting tool selection, researchers have proposed various approaches to mitigate this problem. Among these, improving the drill bit design is one of the most feasible and economical solutions. The theory and applications in drill design have been progressing, and research has been published in various fields. However, pieces of information on drill design are dispersed, and no comprehensive review paper focusing on this topic. Systemizing this information is crucial and, therefore, the impetus of this review. Here, we review not only the state-of-the-art in drill bit designs-advances in surgical drill bit design-but also the influences of each drill bit geometries on bone damage. Also, this work provides future directions for this topic and guidelines for designing an improved surgical drill bit. The information in this paper would be useful as a onestop document for clinicians, engineers, and researchers who require information related to the tool design in bone drilling surgery.

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“…The variation in bone mineral density (BMD) was thought to give such trend of temperature with drill rotation speeds. Alam et al [6] predicted an increase in the necrosis penetration depth as function of drilling speed based on a thermo-mechanically coupled FEM for various cooling conditions. Increase in feed rate was also reported to increase the bone temperature.…”

Section: F T = Ka (64)mentioning

confidence: 99%

Computational Modeling in Bone Machining

Dahotre

Joshi

2016

Machining of Bone and Hard Tissues

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In general machining of materials is a complex process involving several process and material parameters. During machining, multiple physical phenomena are associated with combination of these process and material parameters. These physical phenomenon may occur simultaneously or in sequence rendering the process of machining very complex. The complexity of machining further depends upon the type of machining process and the nature of material being machined. Especially, in case of bone, as described in Chap. 1, which is a multicomponent, multi-composition, and hierarchical material that in turn makes its interaction with a machining tool (mechanical or heat based) very complicated. To understand such interaction and involved physical phenomena during bone machining is very important to control the machining process for desired outcome. However, inherently complex nature of bone machining renders it to inability for in-situ probing of the physical phenomena employing any experimental techniques. In view of this, either numerical or analytical computational modeling appears to be a suitable approach in designing a bone machining process for desired outcome. Nonetheless, due to the complex nature of bone machining, the search of open literature revealed paucity of efforts on computational modeling. Only limited efforts were focused on heat transfer and stress based computational modeling. Furthermore, some of the efforts have also tried to model micro scaled mechanics in bone. Hence, the current chapter is divided in to three sections; heat transfer model, stress based models, and micro scaled models. Key equations and process parameters in each case have been elaborated. Important studies concerning all these aspects have been discussed. Heat Transfer ModelsPrediction of heat transfer during bone machining process aids in optimization of the operation intended to minimize the damage by thermal necrosis. Basic equation governing the heat transfer (Eq. 6.1) within the bone forms the foundation of thermal finite element model (FEMs).

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Experimental Study on the Effect of Point Angle on Force and Temperature in Ultrasonically Assisted Bone Drilling

Cited by 23 publications

References 29 publications

Drilling of bone: Effect of drill bit geometries on thermal osteonecrosis risk regions

Drilling of bone: Effect of drill bit geometries on thermal osteonecrosis risk regions

Surgical Drill Bit Design and Thermomechanical Damage in Bone Drilling: A Review

Computational Modeling in Bone Machining

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