Marmor modular knee in unicompartmental disease. Minimum four-year follow-up.

Micromotion in knee arthroplasty

“…These prostheses were all, except one, asymptomatic and represent conventional, widely used types of arthroplasties with excellent results reported in long-term follow-ups (Insall et al 1983, Bauer et al 1985, Marmor 1985. It is thereforeconcluded that micromotion, both migration and inducible displacement, is the rule in such arthroplasties and is quite compatible with successful clinical results.…”

“…A number of reports have been published on the deformation of plastic components (Ducheyne et al 1978, Marmor 1979, Jdnson 1981, Knutsson et al 1981, Bartel et al 1982, Scott 1982, Wright et al 1982. Such deformation allows high peak forces to be transmitted to the underlying bone, possibly increasing the risk of loosening.…”

Deformation and Loosening of the Tibial Component in Knee Arthroplasty with Unicompartmental Endoprostheses

“…The failure-rate in some studies is no less than 10 per cent with a follow-up of 2 years or more (Gunston & McKenzie 1976, Marmor 1979, and the same rate has been reported for bicompartmental semiconstrained endoprostheses (Ilstrup et al 1976b, Freeman et al 1978, Lacey 1978.…”

“…Marmor (1976Marmor ( , 1979 and Ducheyne et al (1978) warn against the use of thin, 5-6 mm polyethylene tibial components because of the high risk of deformation and loosening. However, not only are thin components still available but also new endoprosthesis designs with thin components have been introduced.…”

Unicompartmental arthroplasty of the knee: Cadaver study of tibial component placement

“…Amici 1982), although slight posterior tilting has also been used (Marmor 1979, Insall & Anglietti 1980, Scott & Santore 1981. As the median inclination of the medial plateau in the present study was lo", it was decided to compare articulation at this component placement with that at horizontal placements.…”