Enhanced stability of uncemented canine femoral components by bone ingrowth into the porous coatings

Jasty, Murali; Bragdon, Charles R.; Zalenski, Edward; O’Connor, Daniel; Page, Alexandra E.; Harris, William H.

doi:10.1016/s0883-5403(97)90055-3

Cited by 38 publications

(28 citation statements)

References 11 publications

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“…However, if rigid initial stability is acquired at surgery, ingrowth of bone onto uncemented implants will occur (Jasty et al 1997, Pilliar et al 1986). Recently, satisfactory clinical results have been obtained using weight bearing immediately after uncemented total hip arthroplasty (Chan et al 2003, Boden et al 2004.…”

mentioning

confidence: 99%

Immediate weight bearing after uncemented total hip arthroplasty with an anteverted stem: A prospective randomized comparison using radiostereometry

et al. 2007

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mentioning

confidence: 99%

Immediate weight bearing after uncemented total hip arthroplasty with an anteverted stem: A prospective randomized comparison using radiostereometry

et al. 2007

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“…Although relative differences may be large when comparing micromotions from blocks of different densities, absolute values of micromotion remained very low, especially when compared to previously reported values and to the limits needed to create loosening. In any case, caution should be exercised when equating micromotion measured on Sawbones with the physiological limits on bone ingrowth (Cameron et al, 1973, Ducheyne et al, 1977, Jasty et al, 1997a, Jasty et al, 1997b, Pilliar et al, 1986.…”

Section: Discussionmentioning

confidence: 99%

“…Nevertheless, the rate of problems remains high, in part because of glenoid component loosening (Gerber et al, 2009, Mole andFavard, 2007). Micromotion from 28 to 150 micrometers (µm) has been shown to inhibit bone ingrowth and lead to an unstable fibrous tissue layer between a metallic implant and the host bone (Cameron et al, 1973, Ducheyne et al, 1977, Jasty et al, 1997a, Jasty et al, 1997b, Pilliar et al, 1986. Therefore, minimizing micromotion at the time of initial fixation should lead to better ingrowth of bone and a more stable implant.…”

Section: Introductionmentioning

confidence: 99%

In vitro assessments of reverse glenoid stability using displacement gages are misleading — Recommendations for accurate measurements of interface micromotion

Favre

Perala

Vogel

et al. 2011

Clinical Biomechanics

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BACKGROUND: Baseplate micromotion of the reverse shoulder glenoid component can lead to implant loosening. We hypothesized that a remotely positioned displacement gage measures elastic deformation of the system rather than actual micromotion at the implant/bone interface. METHODS: Reverse glenoid components were implanted into polyurethane blocks of 3 different densities. A 700 N compressive load was maintained and a vertical 700 N shear load was applied for 1000 cycles. In addition to the typical gage measurement, a digital image analysis of micromotion at the implant/block interface using high resolution cameras was performed. The measurements were validated on human specimens. A finite element model was implemented to study the isolated effect of block deformation on baseplate displacements. FINDINGS: With the gage, typically reported micromotions were measured. Two orders of magnitude lower micromotions were detected using interface image-based analysis. The finite element simulation showed that elastic deformation alone can cause micromotion magnitudes as measured with displacement gages. Polyurethane blocks of 20 and 15 lbs per cubic foot density best reproduced micromotions as measured on human specimens. INTERPRETATION: We found considerably less relative micromotion at the implant/bone interface than previously assumed. Gage measurements quantify elastic deformation and not true interface micromotion. High resolution digital imaging at the implant/bone interface is strongly recommended for an accurate assessment of reverse glenoid component micromotion. Originally published at: Favre, P; Perala, S; Vogel, P; Fucentese, S F; Goff, J R; Gerber, C; Snedeker, J G (2011). In vitro assessments of reverse glenoid stability using displacement gages are misleading -recommendations for accurate measurements of interface micromotion. Clinical Biomechanics, 26 (9)

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“…More recently, Jasty has reported that bone ingrowth was detected in a dog femur even though micromotion exceeded 50 µm [13]. Rao et al [21] and Ritter et al [22] reported satisfactory clinical and radiographic results in patients who were allowed full weight-bearing immediately after surgery.…”

Section: Discussionmentioning

confidence: 99%

Full weight-bearing after cementless total hip arthroplasty

Kishida

Sugano

Sakai

et al. 2001

International Orthopaedics (SICOT)

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Enhanced stability of uncemented canine femoral components by bone ingrowth into the porous coatings

Cited by 38 publications

References 11 publications

Immediate weight bearing after uncemented total hip arthroplasty with an anteverted stem: A prospective randomized comparison using radiostereometry

Immediate weight bearing after uncemented total hip arthroplasty with an anteverted stem: A prospective randomized comparison using radiostereometry

In vitro assessments of reverse glenoid stability using displacement gages are misleading — Recommendations for accurate measurements of interface micromotion

Full weight-bearing after cementless total hip arthroplasty

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