A computer-based biomechanical analysis of the three-dimensional motion of cementless hip prostheses

Gilbert, Jeremy L.; Bloomfeld, Richard S.; Lautenschlager, Eugene P.; Wixson, Richard L.

doi:10.1016/0021-9290(92)90252-v

Cited by 32 publications

(18 citation statements)

References 4 publications

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“…Micromotion has already been measured on cadaveric femurs, but only on a limited number of simultaneous locations. The values of micromotion reported here are compatible with other cadaveric measurements (Walker et al, 1987;Gilbert et al, 1992;Buhler et al, 1997;Britton et al, 2004). Although the comparison is not always easy because of different techniques and loading conditions, most cadaveric studies report maximal amplitude of micromotion and subsidence of about 100 mm, with higher values on the medial than on the lateral side.…”

Section: Discussionsupporting

confidence: 78%

“…This measure is usually divided into subsidence (Steimer et al, 2006) and micromotion (Baleani et al, 2000). Recent studies are mainly using linear variable differential transducers (LVDT's) (Walker et al, 1987;Gilbert et al, 1992;Buhler et al, 1997;Britton et al, 2004;Cristofolini et al, 2007;Gheduzzi and Miles, 2007. LVDT however do not really measure the local relative micromotion between the stem and the bone, but also include bone deformation between the device fixation and the measurement site.…”

Section: Introductionmentioning

confidence: 99%

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Simultaneous and multisite measure of micromotion, subsidence and gap to evaluate femoral stem stability

Gortchacow

Wettstein

Pioletti

et al. 2012

Journal of Biomechanics

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a b s t r a c tThe initial stability of cementless femoral components is crucial for the long-term success of total hip arthroplasty. This has been reported in animal and clinical studies. Until now, the stability was evaluated by the measurement of relative micromotion on a few simultaneous locations around the stem in cadaveric experiments. This paper presents an extended experimental setup to measure simultaneously local micromotion, subsidence and gap on hundreds of points at the bone-stem interface. This technique we applied to anatomical and straight stems in three pairs of cadaveric femurs. Measurements were in agreement with typically reported values. Conversely to other methods, which measure micromotion between implant and bone anchoring points of the measuring device, our method provides local micromotion between stem surface and adjacent bone surface. The observed variation of micromotion at the peri-implant surface confirms the importance of this simultaneous measure on a lot of points around the implant.

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Section: Discussionsupporting

confidence: 78%

Section: Introductionmentioning

confidence: 99%

Simultaneous and multisite measure of micromotion, subsidence and gap to evaluate femoral stem stability

Gortchacow

Wettstein

Pioletti

et al. 2012

Journal of Biomechanics

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“…We have also verified that this error was sufficient to detect detrimental micromotions, and their location. The maximal amplitude of micromotion was consistent with typical reported values in the literature (Walker et al, 1987;Gilbert et al, 1992;Buhler et al, 1997;Britton et al, 2004).…”

Section: Discussionsupporting

confidence: 80%

“…However, even if the problem is clearly observed and partly quantified, measurement methods are not fully satisfactory. Most of the studies are using linear variable differential transducers (LVDT's) (Walker et al, 1987;Gilbert et al, 1992;Buhler et al, 1997;Britton et al, 2004;Gheduzzi and Miles, 2007) which do not really measure the local relative micromotion between the stem and the bone, but also include bone deformation between the device fixation and the measurement site. Besides, the number of simultaneous measurement points is limited to 1 or 2, with a reported maximum of 4 (Cristofolini et al, 2003).…”

Section: Introductionmentioning

confidence: 99%

A new technique to measure micromotion distribution around a cementless femoral stem

Gortchacow¹,

Wettstein²,

Pioletti³

et al. 2011

Journal of Biomechanics

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a b s t r a c tThe interfacial micromotion is closely associated to the long-term success of cementless hip prostheses. Various techniques have been proposed to measure them, but only a few number of points over the stem surface can be measured simultaneously. In this paper, we propose a new technique based on micro-Computer Tomography (mCT) to measure locally the relative interfacial micromotions between the metallic stem and the surrounding femoral bone. Tantalum beads were stuck at the stem surface and spread at the endosteal surface. Relative micromotions between the stem and the endosteal bone surfaces were measured at different loading amplitudes. The estimated error was 10 mm and the maximal micromotion was 60 mm, in the loading direction, at 1400 N. This pilot study provided a local measurement of the micromotions in the 3 direction and at 8 locations on the stem surface simultaneously. This technique could be easily extended to higher loads and a much larger number of points, covering the entire stem surface and providing a quasi-continuous distribution of the 3D interfacial micromotions around the stem. The new measurement method would be very useful to compare the induced micromotions of different stem designs and to optimize the primary stability of cementless total hip arthroplasty.

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“…For this purpose the micromotions between the implant and the artificial bone, crucial for bone ingrowths [14][15][16] were recorded. Additionally the results should be compared with the literature.…”

Section: Introductionmentioning

confidence: 99%

The compression—rotation stem: An experimental study on the primary stability of a new revision hip stem

Kraenzlein¹,

Mazoochian²,

Fottner³

et al. 2008

Proc Inst Mech Eng H

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In revision hip arthroplasty with bone defects of the proximal femur, a well-established treatment method is reconstruction with impacted allograft spongiosa chips and cemented implantation of a polished stem. Building on this principle of impacted bone grafting, a femoral implant, which is suited to uncemented hip arthroplasty as well as for uncemented revisions, was designed. This so-called compression-rotation stem (CR stem) is collarless and has flanks which compress the impacted bone chips during implantation and thereby increase the rotational stability. To evaluate the primary stability of this new shaft after impaction grafting, the micromotion was determined using six motion transducers. Under physiological loading conditions with simulation of the muscle activities at the proximal femur the application was dynamically loaded for 15,000 cycles with 1000 +/- 500 N and afterwards for 5000 cycles with 1300 +/- 1000 N. Uncemented CR stems and the control Exeter stems were implanted in a standardized manner according to the X-Change method. Therefore they were implanted into artificial femora that had been previously resected, hollowed, and filled with impacted human spongeous bone allograft to simulate bone defects. Subsequently, the femora were loaded under identical conditions and the micromotions measured. In the majority of the implantations, no significant differences could be found. In conclusion, similar clinical results for the two stems should be expected.

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A computer-based biomechanical analysis of the three-dimensional motion of cementless hip prostheses

Cited by 32 publications

References 4 publications

Simultaneous and multisite measure of micromotion, subsidence and gap to evaluate femoral stem stability

Simultaneous and multisite measure of micromotion, subsidence and gap to evaluate femoral stem stability

A new technique to measure micromotion distribution around a cementless femoral stem

The compression—rotation stem: An experimental study on the primary stability of a new revision hip stem

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