Horizontal test stand for bone screw insertion

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Abstract: Screws are a versatile method of fixation and are often used in orthopaedic surgery. Various specialised geometries are often used for bone screws to optimise their fixation strengths in limited spaces at the expense of manufacturing costs. Additionally, ongoing research is looking to develop systems/models to automatically optimise bone screw tightening torques. For both applications, it is desirable to have a test rig for inserting screws in a regulated, instrumented, and repeatable manner. This work presents such a test rig primarily used for the validation of optimal torque models; however, other applications like the above are easily foreseeable. Key features include controllable insertion velocity profiles, and a high rate measurement of screw torque, angular displacement, and linear displacement. The test rig is constructed from mostly inexpensive components, with the primary costs being the rotational torque sensor (approx. 2000 €), and the remainder being approximately 1000 €. This is in comparison to a biaxial universal testing machine which may exceed 100,000 €. Additionally, the firmware and interface software are designed to be easily extendable. The angular velocity profiling and linear measurement repeatability of the test rig is tested and the torque readings are compared to an off-the-shelf static torque sensor

Location: Deutsche Nationalbibliothek Frankfurt am Main

Extent: Online-Ressource

Language: Englisch

Notes: Hardware. - 2, 3 (2024) , 223-255, ISSN: 2813-6640

Event: Veröffentlichung

(where): Freiburg

(who): Universität

(when): 2024

Creator: Wilkie, Jack
Rauter, Georg
Möller, Knut

DOI: 10.3390/hardware2030011

URN: urn:nbn:de:bsz:25-freidok-2578155

Rights: Open Access; Der Zugriff auf das Objekt ist unbeschränkt möglich.

Last update: 15.08.2025, 7:35 AM CEST

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Time of origin

2024

Other Objects (12)

Horizontal Test Stand for Bone Screw Insertion

Horizontal Test Stand for Bone Screw Insertion

Effects of Velocity Profile and Plate Usage on Identified Bone Strength during Instrumented Screw Insertion

Initial engagement and axial force model for self-tapping bone screws

Initial engagement and axial force model for self-tapping bone screws

Analysis of expansion within a pressure inflated section of an urethral stricture model

Analysis of expansion within a pressure inflated section of an urethral stricture model

Using adaptive learning rate to generate adversarial images

Using adaptive learning rate to generate adversarial images

Robustness evaluation on different training state of a CNN model

Robustness evaluation on different training state of a CNN model

Interfacing with Prototype Instrumented Smart Screwdriver for Bone Screw Torque Regulation : 12th IFAC Symposium on Biological and Medical Systems BMS 2024, September 11-13, 2024, Villingen-Schwenningen, Germany

Interfacing with Prototype Instrumented Smart Screwdriver for Bone Screw Torque Regulation : 12th IFAC Symposium on Biological and Medical Systems BMS 2024, September 11-13, 2024, Villingen-Schwenningen, Germany

Developments in Modelling Bone Screwing

Developments in Modelling Bone Screwing

Stripping Torque Model for Bone Screws

Stripping Torque Model for Bone Screws

Model-based bone material property identification

Model-based bone material property identification

Initial validation of automatic torque-limiting bone screwdriver system

Initial validation of automatic torque-limiting bone screwdriver system

Determination of the water content of an ex vivo porcine liver

Determination of the water content of an ex vivo porcine liver

Horizontal Test Stand for Bone Screw Insertion

Horizontal Test Stand for Bone Screw Insertion

Effects of Velocity Profile and Plate Usage on Identified Bone Strength during Instrumented Screw Insertion

Initial engagement and axial force model for self-tapping bone screws

Initial engagement and axial force model for self-tapping bone screws

Analysis of expansion within a pressure inflated section of an urethral stricture model

Analysis of expansion within a pressure inflated section of an urethral stricture model

Using adaptive learning rate to generate adversarial images

Using adaptive learning rate to generate adversarial images

Robustness evaluation on different training state of a CNN model

Robustness evaluation on different training state of a CNN model

Interfacing with Prototype Instrumented Smart Screwdriver for Bone Screw Torque Regulation : 12th IFAC Symposium on Biological and Medical Systems BMS 2024, September 11-13, 2024, Villingen-Schwenningen, Germany

Interfacing with Prototype Instrumented Smart Screwdriver for Bone Screw Torque Regulation : 12th IFAC Symposium on Biological and Medical Systems BMS 2024, September 11-13, 2024, Villingen-Schwenningen, Germany

Developments in Modelling Bone Screwing

Developments in Modelling Bone Screwing

Stripping Torque Model for Bone Screws

Stripping Torque Model for Bone Screws

Model-based bone material property identification

Model-based bone material property identification

Initial validation of automatic torque-limiting bone screwdriver system

Initial validation of automatic torque-limiting bone screwdriver system

Determination of the water content of an ex vivo porcine liver

Determination of the water content of an ex vivo porcine liver

Horizontal Test Stand for Bone Screw Insertion

Horizontal Test Stand for Bone Screw Insertion

Effects of Velocity Profile and Plate Usage on Identified Bone Strength during Instrumented Screw Insertion

Initial engagement and axial force model for self-tapping bone screws

Initial engagement and axial force model for self-tapping bone screws

Analysis of expansion within a pressure inflated section of an urethral stricture model

Analysis of expansion within a pressure inflated section of an urethral stricture model

Using adaptive learning rate to generate adversarial images

Using adaptive learning rate to generate adversarial images

Robustness evaluation on different training state of a CNN model

Robustness evaluation on different training state of a CNN model

Interfacing with Prototype Instrumented Smart Screwdriver for Bone Screw Torque Regulation : 12th IFAC Symposium on Biological and Medical Systems BMS 2024, September 11-13, 2024, Villingen-Schwenningen, Germany

Interfacing with Prototype Instrumented Smart Screwdriver for Bone Screw Torque Regulation : 12th IFAC Symposium on Biological and Medical Systems BMS 2024, September 11-13, 2024, Villingen-Schwenningen, Germany

Developments in Modelling Bone Screwing

Developments in Modelling Bone Screwing

Stripping Torque Model for Bone Screws

Stripping Torque Model for Bone Screws

Model-based bone material property identification

Model-based bone material property identification

Initial validation of automatic torque-limiting bone screwdriver system

Initial validation of automatic torque-limiting bone screwdriver system

Determination of the water content of an ex vivo porcine liver

Determination of the water content of an ex vivo porcine liver

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