Pitfalls of Biomechanical Testing

Kostuik, John P.; Smith, Timothy

doi:10.1097/00007632-199110000-00017

Cited by 28 publications

(8 citation statements)

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“…While cement augmentation techniques have, in the past, been felt to represent an aggressive approach to extreme clinical situations, clinical studies have shown augmentation to be safe (no extravasation) when performed properly. [33][34][35][36] For the most part, studies of augmentation have been limited to situations involving salvage surgery after screw pullout. 37,38 For example, Zindrick et al 39 compared pullout strength when nonpressurized and pressurized polymethyl methacrylate was used to augment revision pedicle screws.…”

Section: Discussionmentioning

confidence: 99%

Primary Pedicle Screw Augmentation in Osteoporotic Lumbar Vertebrae

Burval

McLain²,

Milks³

et al. 2007

Spine

282

204

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Section: Discussionmentioning

confidence: 99%

Primary Pedicle Screw Augmentation in Osteoporotic Lumbar Vertebrae

Burval

McLain²,

Milks³

et al. 2007

Spine

282

204

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“…30 To avoid these problems, calf thoracic spines were used in this study. Calf spines have been widely used for in vitro testing because previous studies have shown significant anatomic and mechanical similarities between human and calf models.…”

Section: Discussionmentioning

confidence: 99%

A Biomechanical Analysis of Sublaminar and Subtransverse Process Fixation Using Metal Wires and Polyethylene Cables

Fujita

Diab²,

Xu³

et al. 2006

Spine

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“…Biologische Verwesungs- Vorgänge des Präparates limitieren die Versuchsdauer auf maximal 100 000 Zyklen bei der empfohlenen Frequenz von 5 Hz [2], Frühversager unter den Implantaten können vielfach bereits nach 10 000 Zyklen ermittelt werden. Der verwendete, nicht destruktive Versuchsaufbau gibt bessere Auskunft über die Implantatstabilität als einfache Lastauszugsversuche [2,6,8,10].…”

Section: Diskussionunclassified

Dreidimensionale Aufzeichnung der Mikrobewegung von Wirbelkörperimplantaten durch ein speziell adaptiertes Meßsystem auf Wirbelstrombasis - Three-dimensional Recording of the Micromotion of Spinal Implants Using Specially Adapted Magnetic Transducers

Schramm¹,

Fourlas²,

Pitto³

et al. 1999

Biomedizinische Technik/Biomedical Engineering

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The aim of this study was to develop a biomechanical experimental set-up to quantify motion of ventrally inserted spinal implants at the implant/bone interface. The model we used was the vertebral column of the calf. Lumbar vertebrae L2 to L4 were "instrumented" with a screw-rod system. The adjacent vertebrae L1 and L5 were connected to a servohydraulic testing machine and axial compression applied. Shortening of the specimen and three-dimensional movement of the most cranial implant relative to the bone was recorded using 3 electromagnetic transducers. 100,000 cycles of axial loading varying between -0.5 kN and -1 kN were applied. Static shortening of the specimen of 8.5 mm and an elastic movement of 180 to 280 microns were measured. The greatest amplitude of single-plane motion was recorded in the sagittal plane in both static and elastic modes. Implant motion within each cycle was recorded accurately as load-displacement curves within a range of 1.35 to 30 microns. With this test set-up, primary stability of different spinal implant systems can be compared. The use of electromagnetic transducers permits three-dimensional implant motion analysis even when only a mono-axial servohydraulic testing machine is available.

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Pitfalls of Biomechanical Testing

Cited by 28 publications

References 0 publications

Primary Pedicle Screw Augmentation in Osteoporotic Lumbar Vertebrae

Primary Pedicle Screw Augmentation in Osteoporotic Lumbar Vertebrae

A Biomechanical Analysis of Sublaminar and Subtransverse Process Fixation Using Metal Wires and Polyethylene Cables

Dreidimensionale Aufzeichnung der Mikrobewegung von Wirbelkörperimplantaten durch ein speziell adaptiertes Meßsystem auf Wirbelstrombasis - Three-dimensional Recording of the Micromotion of Spinal Implants Using Specially Adapted Magnetic Transducers

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