Digital volume correlation of bone-screw interface at different tightening levels

Melissa Ryan, Marta Peña-Fernández, Gianluca Tozzi, Egon Perilli, Karen J Reynolds

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Stripping during screw insertion occurs with an incidence as high as 50% [1]. With an increase in age and osteoporosis, overtightening is more likely as surgeons try to achieve torques similar to that observed in young healthy bone. Stripping torque can be predicted based on the torque at head contact[2]. The question remains however, “how tight is tight enough?”. Due to the diffusion of in situ biomechanical imaging (mainly via micro-CT), digital volume correlation (DVC) has become a powerful tool to measure full-field internal deformations in trabecular/cortical bone [3] and bone-biomaterial systems [4]. This ongoing study uses a custom developed computer-controlled screw insertion device to perform time-elapsed micro-CT imaging of the bone-implant interface, in combination with DVC. The aim is to quantify the deformation of the trabecular bone at each rotation step with increased tightening torque.
Original languageEnglish
Number of pages1
Publication statusPublished - 2017
EventAnnual Congress of the European Society of Biomechanics - Sevilla, Spain
Duration: 2 Jul 20175 Jul 2017
Conference number: 23


ConferenceAnnual Congress of the European Society of Biomechanics

Bibliographical note

The Congress itself featured 5 plenary lectures, 442 podium presentations and 140 flash and poster presentations. All the abstracts are available in open access: Seville 2017


  • biomechanics
  • biomechanical imaging
  • trabecular bone


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