High inter-specimen variability of baseline data for the tibio-talar contact area

Matricali, Giovanni; Bartels, Ward; Labey, Luc; Dereymaeker, Greta; Luyten, Frank P.; Sloten, Jos Vander

doi:10.1016/j.clinbiomech.2008.10.006

Cited by 10 publications

(7 citation statements)

References 27 publications

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“…Absolute values of the intact TTCA for the present study have recently been reported and shown to be in line with previous work with a similar set-up 35 . Changes in TTCA caused by joint surface defects or step-off incongruities have been investigated previously.…”

Section: Discussionsupporting

confidence: 93%

“…Firstly, the modest changes reported in the past concerned mean values that, due to inter-specimen variability, can easily mask a significant effect in single specimens. Reporting the results of the single specimens addresses this criticism 35 . Secondly, continuing deformation of the defect's edges in joints being moved during loading was reported 38 .…”

Section: Discussionmentioning

confidence: 99%

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Changes in contact area characteristics of the ankle after a cartilage biopsy at the postero-medial rim of the talar dome

Matricali

Bartels

Labey

et al. 2009

Osteoarthritis and Cartilage

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Section: Discussionsupporting

confidence: 93%

Section: Discussionmentioning

confidence: 99%

Changes in contact area characteristics of the ankle after a cartilage biopsy at the postero-medial rim of the talar dome

Matricali

Bartels

Labey

et al. 2009

Osteoarthritis and Cartilage

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“…276 . Th e contact pressure of the prosthetic area before implantation ranged from 0.02% to 18% in the cadavers we used (see Table 2).…”

mentioning

confidence: 99%

Treatment of osteochondral defects of the talus

Bergen

Leeuw

Dijk

2008

Revue de Chirurgie Orthopédique et Réparatrice de l'Appareil Mo

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“…Variability between specimens is a common finding in cadaver experiments ( Matricali et al 2009 ). The contact pressure of the prosthetic area before implantation ranged from 0.02% to 18% in the cadavers we used ( Table 2 ).…”

Section: Discussionmentioning

confidence: 99%

Novel metallic implantation technique for osteochondral defects of the medial talar dome

et al. 2010

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Background and purposeA metallic inlay implant (HemiCAP) with 15 offset sizes has been developed for the treatment of localized osteochondral defects of the medial talar dome. The aim of this study was to test the following hypotheses: (1) a matching offset size is available for each talus, (2) the prosthetic device can be reproducibly implanted slightly recessed in relation to the talar cartilage level, and (3) with this implantation level, excessive contact pressures on the opposite tibial cartilage are avoided.MethodsThe prosthetic device was implanted in 11 intact fresh-frozen human cadaver ankles, aiming its surface 0.5 mm below cartilage level. The implantation level was measured at 4 margins of each implant. Intraarticular contact pressures were measured before and after implantation, with compressive forces of 1,000–2,000 N and the ankle joint in plantigrade position, 10° dorsiflexion, and 14° plantar flexion.ResultsThere was a matching offset size available for each specimen. The mean implantation level was 0.45 (SD 0.18) mm below the cartilage surface. The defect area accounted for a median of 3% (0.02–18) of the total ankle contact pressure before implantation. This was reduced to 0.1% (0.02–13) after prosthetic implantation.InterpretationThese results suggest that the implant can be applied clinically in a safe way, with appropriate offset sizes for various talar domes and without excessive pressure on the opposite cartilage.

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High inter-specimen variability of baseline data for the tibio-talar contact area

Cited by 10 publications

References 27 publications

Changes in contact area characteristics of the ankle after a cartilage biopsy at the postero-medial rim of the talar dome

Changes in contact area characteristics of the ankle after a cartilage biopsy at the postero-medial rim of the talar dome

Treatment of osteochondral defects of the talus

Novel metallic implantation technique for osteochondral defects of the medial talar dome

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