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| 2. |
- Arndt, A, et al.
(författare)
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An in vitro comparison of bone deformation measured with surface and staple mounted strain gauges
- 1999
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Ingår i: JOURNAL OF BIOMECHANICS. - : ELSEVIER SCI LTD. - 0021-9290. ; 32:12, s. 1359-1363
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Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
- Chicken tibiae were chosen as a model for human second metatarsals. Local surface bone deformation in a 4-point bending configuration was measured in vitro by both strain gauge instrumented staples and strain gauges bonded to the bone's cortical surface.
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| 3. |
- Ekenman, I, et al.
(författare)
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Local bone deformation at two predominant sites for stress fractures of the tibia: an in vivo study
- 1998
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Ingår i: Foot & ankle international. - : SAGE Publications. - 1071-1007 .- 1944-7876. ; 19:7, s. 479-484
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Tidskriftsartikel (refereegranskat)abstract
- Local bone deformation was registered at two predominant injury sites for tibial stress fractures in a healthy female volunteer. Two instrumented strain gauge staples were inserted under local anesthesia to the anterior middiaphysis (AM) and to the posteromedial part of the distal tibia (PD). Calibration and reliability of the instrumented staple system have previously been demonstrated in vitro. Concomitant ground reaction forces were registered with a Kistler force plate. Studying peak values, it was shown that during a voluntary 30-cm forward jump, PD deformation was greater during forefoot landing (2700–4200 microstrain) than during a heel strike landing (1200–1900 microstrain) and also compared with the concomitant AM deformation under both above testing conditions (1300–1900 microstrain). The stance phase during walking resulted in PD deformation of 950 microstrain, whereas the concomitant AM deformation was 334 microstrain. The greatest AM deformation (mean, 2128 microstrain) was registered during ground contact after a voluntary vertical drop from a height of 45 cm, concomitant with a PD deformation of 436 microstrain. These data are the first to show different local deformations at various sites of the tibia in vivo. The PD deformation was larger than previously noted from other parts of the tibia, whereas the middiaphysis data are consistent with other reports. The results may support the clinical assumption of different etiologies for stress fractures at these predominant sites.
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| 4. |
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| 5. |
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| 6. |
- Halvorsen, K, et al.
(författare)
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A new method for estimating the axis of rotation and the center of rotation
- 1999
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Ingår i: JOURNAL OF BIOMECHANICS. - : ELSEVIER SCI LTD. - 0021-9290. ; 32:11, s. 1221-1227
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Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
- A new method is presented for estimating the parameters of two different models of a joint. The two models are: (1) A rotational joint with a fixed axis of rotation, also referred to as a hinge joint and (2) a ball and socket model, corresponding to a sph
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| 7. |
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