57 kDa PS; 25 kDa PMMA; m ~494; n ~520 PS Mn = 57 ± 6 kg/mol PMMA Mn = 25 ± 3 kg/mol PDI of the overall block copolymer <1.2 PS molecular weight verified by SEC (taking an aliquot from the reaction mixture) and the PMMA molecular weight by NMR spectroscopy. The overall block copolymer molecular weight distribution would be determined by SEC.
The Journal of bone and joint surgery. British volume, 88(1), 120-122 (2005-12-21)
The outcome of a cemented hip arthroplasty is partly dependent on the type of cement which is used. The production of an interface gap between the stem and the cement mantle as a result of shrinkage of the cement, may
In a cadaver study, we prepared 29 paired human cadaver femora using 3 different broaches of identical geometry but different surface characteristics. In one group of 20 pairs, preparation with chipped-toothed broaches was compared to diamond-shaped broaches; in the other
Shika zairyo, kikai = Journal of the Japanese Society for Dental Materials and Devices, 9(1), 86-101 (1990-01-01)
Methyl methacrylate (MMA)-p-styrene sulfonic acid copolymer (MS) was prepared and its adhesion to ground tooth substrates was evaluated. MS is crosslinked with Ca2+ supplied by hydroxyapatite in the smeared layer on the ground enamel and dentin, and sticks to their
Critical reviews in biomedical engineering, 28(3 - 4), 457-461 (2000-12-07)
Poly(methylmethacrylate) (PMMA) bone cements have been used for the fixation of hip and knee implants since the early 1960s. Aseptic loosening, related to fracture of the PMMA, continues to be the primary mode of failure for these prostheses. Failed prostheses
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