abstract：:The water absorption characteristics of resins, upon which many composite filling materials are based, have been studied. In general, the equilibrium uptake is less than that predicted from the water absorption of composite filling materials, if it is assumed that the polymer alone absorbs the water. Also, whereas the...

journal_title：Biomaterials

authors： Braden M,Davy KW

更新日期：1986-11-01 00:00:00

abstract：:The protective role of different dentine fractions and of dentine slices in moderating the cytotoxicity of zinc oxide eugenol (ZOE) was investigated. The collagen fraction of dentine powder provided increased protection over intact powder. Slices of dentine offered greater protection probably by providing a physical b...

journal_title：Biomaterials

authors： Meryon SD,Jakeman KJ

更新日期：1986-11-01 00:00:00

abstract：:An in vitro perfusion system was used to study the platelet reactivity of the following vascular graft materials when tested with human blood: expanded polytetrafluoroethylene (ePTFE), crimped Dacron Bionit (DB) and preclotted Dacron Bionit (DB/PC). These materials were simultaneously compared to silicone rubber (SR) ...

journal_title：Biomaterials

authors： Kottke-Marchant K,Anderson JM,Rabinovitch A

更新日期：1986-11-01 00:00:00

abstract：:A-B-type block copolymers, consisting of polystyrene (PST) or poly(methyl methacrylate) (PMMA) forming segment (A) and poly(gamma-benzyl L-glutamate) (P[Glu(OBzl)]) segment (B), were synthesized and the thrombus formation on these block copolymer films was investigated in relation to the adsorption of plasma proteins ...

journal_title：Biomaterials

authors： Mori A,Ito Y,Sisido M,Imanishi Y

更新日期：1986-09-01 00:00:00

abstract：:Dental amalgam prepared from high copper and conventional alloys was evaluated for its compressive strength as a function of deformation rate. Results showed that the compressive strength rose to a maximum as deformation rate increased and then began to fall at higher deformation rates. Crack propagation predominated ...

journal_title：Biomaterials

authors： Zardiackas LD,Anderson L Jr

更新日期：1986-07-01 00:00:00

abstract：:Levels of corrosion products released from dental alloys in natural or synthetic saliva, i.e. from amalgams, cobalt, gold, nickel, iron, or titanium based alloys have been surveyed. The amounts of Ag, Au, Cd, Co, Cr, Cu, Hg, Mo, Ti or Ni released from such alloys, either in vitro or in vivo during animal tests or duri...

journal_title：Biomaterials

authors： Brune D

更新日期：1986-05-01 00:00:00

abstract：:An examination has been made of factors affecting the results obtained from the impinging jet method for evaluating the durability of dental cements. These included intrinsic factors i.e. the powder/liquid ratio used in the mix and the cure time of the cement and extrinsic factors i.e. the pH, ionic strength and tempe...

journal_title：Biomaterials

authors： Wilson AD,Groffman DM,Powis DR,Scott RP

更新日期：1986-05-01 00:00:00

abstract：:Novel acid-base reaction cements have been developed for use as controlled release formulations. Many new ones have been discovered and assessed; these include those which are capable of releasing copper, cobalt or selenium singly or in combination. A selection was made of the most suitable formulations for this purpo...

journal_title：Biomaterials

authors： Prosser HJ,Wilson AD,Groffman DM,Brookman PJ,Allen WM,Gleed PT,Manston R,Sansom BF

更新日期：1986-03-01 00:00:00

abstract：:A series of latex particles, having different sizes and surface structures, were prepared and the dependence of phagocytosis of latex particles by leucocytes on the particle size and surface potential was investigated by measuring the oxygen consumption of leucocytes. Most of the phagocytic behaviour in the initial st...

journal_title：Biomaterials

authors： Kawaguchi H,Koiwai N,Ohtsuka Y,Miyamoto M,Sasakawa S

更新日期：1986-01-01 00:00:00

abstract：:Geliperm hydrogel provides optimal physiological conditions for wound healing. The material is composed of two interlaced networks, one of polyacrylamide and one of agar, and contains about 96% firmly bound water. It is supplied in smooth, elastic, transparent sheets which are impermeable to bacteria but permeable to ...

journal_title：Biomaterials

authors： Kickhöfen B,Wokalek H,Scheel D,Ruh H

更新日期：1986-01-01 00:00:00

abstract：:AuCu and AuAg alloys (30 at. % Au) have been immersed in aqueous solutions of chloride and sulphide with additions of protein (mucin). The surfaces of the alloys were subsequently analysed by means of ESCA and compared with previous and similar tests without addition of mucin. No noticeable effect of the mucin additio...

journal_title：Biomaterials

authors： Herø H,Hultquist G,Odén A

更新日期：1985-11-01 00:00:00

abstract：:The release rate of mercury from a conventional, a dispersed phase or a spherical high copper content amalgam under static conditions in stimulated or artificial saliva has been measured and found to decrease approximately exponentially with time. A higher initial release rate was observed for mercury in stimulated sa...

journal_title：Biomaterials

authors： Brune D

更新日期：1985-09-01 00:00:00

abstract：:By use of scanning electron microscopy (SEM), together with energy dispersive chemical analysis, a study has been made of the comparison of an in vitro method of assessing interface reactions between bone and ceramic implants with the naturally occurring changes seen in the rat ear model. Interface reactions between b...

journal_title：Biomaterials

authors： Williams KR,Blayney AW,Frootko NJ,Ashton BA

更新日期：1985-07-01 00:00:00

abstract：:A novel technique has been developed for microstructural studies of bone. The spatial organizations of the mineral and collagen fibres in bone have been a matter of discussion for some time, with numerous diverse observations arising from various preparative techniques. In this latest investigation details of the mine...

journal_title：Biomaterials

authors： Green M,Isaac DH,Jenkins GM

更新日期：1985-05-01 00:00:00

abstract：:Employing equilibrium dialysis, the binding abilities of Cu, Al, Co and Cr ions from corroded Cu-Al and Co-Cr dental casting alloys towards human saliva and two of its gel chromatographic fractions were determined. Results indicate that both Cu and Co bind to human saliva i.e. 0.045 and 0.027 mg/mg protein, respective...

journal_title：Biomaterials

authors： Mueller HJ

更新日期：1985-05-01 00:00:00

abstract：:Substitution with carboxylic and benzylamine sulphonated groups conferred on dextran both antithrombic activity and the capacity to inhibit formation of the amplification C3 convertase of complement. In dextrans substituted with carboxylic groups (greater than 40%), a high content of sulphonate (greater than 10%) resu...

journal_title：Biomaterials

authors： Mauzac M,Maillet F,Jozefonvicz J,Kazatchkine MD

更新日期：1985-01-01 00:00:00

abstract：:The stability of some water alginates against bacterial degradation was studied. The study was based on viscosity and pH measurements of some typical alginate solutions, containing suitable additives during an extended time period (222 days). ...

journal_title：Biomaterials

authors： Polyzois GL,Andreopoulos AG

更新日期：1985-01-01 00:00:00

abstract：:Two commercially available amalgam alloy powders (one lathe-cut, the other spherical) were characterized in terms of density, surface area, particle size distribution and appearance under the scanning electron microscope. A third, experimental alloy powder, prepared by electrodeposition, was subjected to a similar ana...

journal_title：Biomaterials

authors： Davies EH,Kuhn AT

更新日期：1984-11-01 00:00:00

abstract：:Subtle changes on the surface of polymeric materials on autoclaving have been ignored so far. An increase in cyclic trimer content on the surface of polyethylene terephthalate on autoclaving is reported. This increase may affect the biocompatibility of polyethylene terephthalate. Quantification of the cyclic trimer wa...

journal_title：Biomaterials

authors： Nair PD,Sreenivasan K

更新日期：1984-09-01 00:00:00

abstract：:The curing time dependence of the tear energy, tensile strength and ultimate extension ratio of a range of characterized elastomeric impression materials was investigated. This variation of tensile strength and ultimate extension ratio was correlated with the development of the network structure. The tear energy showe...

journal_title：Biomaterials

authors： Cook WD,Liem F,Russo P,Scheiner M,Simkiss G,Woodruff P

更新日期：1984-09-01 00:00:00

abstract：:The concentrations of soluble copper and tin which were generated by the corrosion of a number of different amalgams in both an artificial saliva and Ringer's solution are reported. Besides variations in solution composition, the effects of solution agitation and abrasive particle wear upon the release of soluble spec...

journal_title：Biomaterials

authors： Mueller HJ,Edahl A

更新日期：1984-07-01 00:00:00

abstract：:Experimental and histological studies on the reaction of surrounding gingiva to permucosal implants of dense calcium hydroxyapatite were carried out in dogs. Epithelial attachment and connection of supra-alveolar collagen fibres to the implant surface seemed to form a biological seal around implants similar to that ar...

journal_title：Biomaterials

authors： Kurashina K,de Lange GL,de Putter C,de Groot K

更新日期：1984-07-01 00:00:00

abstract：:The interactions of two insoluble anticoagulant polystyrene derivatives with human platelets were studied in an in vitro system similar to a chromatography column. Blood was pumped through the column and platelets were counted before and after passage through the column. Interaction of platelets with the beads led to ...

journal_title：Biomaterials

authors： Fougnot C,Lindon J,Kirshner L,Salzman EW,Jozefowicz M

更新日期：1984-05-01 00:00:00

abstract：:The histology and cytology of the tissue response to intra-articular insertion of particles of acrylic bone cement containing barium sulphate has been studied in the guinea pig knee joint. Following insertion of the acrylic, fibrinous debris admixed with particles became adherent to the synovial membrane. Cell prolife...

journal_title：Biomaterials

authors： Meachim G,Brooke G

更新日期：1984-03-01 00:00:00

abstract：:The creep strain rate and fracture of several dental amalgams has been shown to be markedly dependent on the type of loading applied. Cyclic loading typical of the in vivo situation increases creep rates and reduces times to fracture when analysis is based on a Mechanical Equation of State. The cyclic strain rate enha...

journal_title：Biomaterials

authors： Williams KR

更新日期：1983-10-01 00:00:00

abstract：:This highly absorbent, biodegradable dressing derived from seaweed can be successfully applied to cleanse a wide variety of secreting lesions. The high absorption of exudate is achieved via strong hydrophilic gel formation and this serves to control wound secretion levels and to minimize bacterial contamination. Algin...

journal_title：Biomaterials

authors： Gilchrist T,Martin AM

更新日期：1983-10-01 00:00:00

abstract：:The ability of different calcium phosphate to activate the complement system is studied by crossed immunoelectrophoresis demonstrating conversion of C3 to C3b. Complement consumption is determined by a haemolytic assay CH50. Hydroxyapatite powders after sintering induce a significant conversion of C3 and reduction of ...

journal_title：Biomaterials

authors： Klein CP,de Groot K,van Kamp G

更新日期：1983-07-01 00:00:00

abstract：:In previous papers, we have described the preparation and heparin-like properties of insoluble modified polystyrene resins. We now report results obtained with amino acid sulphamide resins that are virtually devoid of sulphonate groups and with resins bearing both sulphonate groups as well as amino acid sulphamides wi...

journal_title：Biomaterials

authors： Fougnot C,Dupillier MP,Jozefowicz M

更新日期：1983-04-01 00:00:00

abstract：:Soft tissue degradation of the 3 principal amalgam phases have been investigated in relation to their role in the formation of the amalgam tattoo. Each phase, finely powdered, was implanted subcutaneously into the submandibular region of guinea-pigs for periods ranging from 1 week to 1 year. The rates of breakdown wer...

journal_title：Biomaterials

authors： Eley BM,Garrett JR

更新日期：1983-04-01 00:00:00

abstract：:The anodic behaviour of Ni-Cr dental alloys used as porcelain substrates has been investigated in both as-cast and thermal treated conditions. Polarization curves and scratching at constant potentials in synthetic salivas have shown that breakdown potentials are not influenced by the elimination of passive films cover...

journal_title：Biomaterials

authors： de De Micheli SM,Riesgo O

更新日期：1982-10-01 00:00:00

abstract：:Scanning electron microscopy has been used to study the interface between implants of pure metals and the muscular tissue of rats. Several problems arise in the interpretation of the observations made, due to the potential for disruption to the tissue and the exacerbation of any corrosion that may have occurred in viv...

journal_title：Biomaterials

authors： McNamara A,Williams DF

更新日期：1982-07-01 00:00:00

abstract：:The synthesis of a new potential anti-thrombogenic polymer is described. Limited halogenation of an aryloxy-substituted polyphosphazene, followed by quaternization with triethylamine yielded a polymer capable of forming polyelectrolyte complexes with sodium heparin. The results of preliminary clotting tests with bovin...

journal_title：Biomaterials

authors： Neenan TX,Allcock HR

更新日期：1982-04-01 00:00:00

abstract：:Hydrogels of crosslinked poly(2-vinylpyridine-1-oxide), PVNO, and poly(2-vinylpyridine-1-oxide)-poly(N-vinyl-pyrrolidone), PNVO-PVP, were synthesized. PVNO hydrogels were found to be degradable in a pseudo-biological medium and their stability could be increased by increasing the relative concentration of the crosslin...

journal_title：Biomaterials

authors： Hasirci VN

更新日期：1981-01-01 00:00:00

abstract：:Human umbilical cord vein segments have been used as vessel substitutes for damaged or occluded arteries, as aorto-coronary by-passes and as arterio-venous fistulae for dialysis. The Dardik-Biograft fixed with glutaraldehyde and the Mindich-Bioflow, fixed with ethanol and dialdehyde starch, are commercially available....

journal_title：Biomaterials

authors： Guidoin R,Marois M,Martin L,Noël HP,Laroche F,Gosselin CO,Côté R,Bénichoux R,Blais P

更新日期：1980-04-01 00:00:00

abstract：:Leaflet tissue specimens prepared from porcine aortic valves treated with glutaraldehyde at low and high pressures have been subjected to 0.45 x 10(9) accelerated fatigue cycles in Ringer's solution. The waveform or crimped property of the collagen fibres in the leaflet tissue is an essential requirement for its abili...

journal_title：Biomaterials

authors： Broom ND

更新日期：1980-01-01 00:00:00

abstract：:This article reviews the controlled release of biologically active agents by the erosion or chemical degradation of a polymer matrix into which the agent is incorporated. Chemically bound active agents and work on steroid release from cholesterol implants are not covered. The mechanisms of polymer erosion discussed ar...

journal_title：Biomaterials

authors： Heller J

更新日期：1980-01-01 00:00:00

abstract：:Particulate wear debris of artificial joints, metallic and plastic, and solutions of metals in body fluids are known to have adverse effects. Encapsulation of the articulating parts would prevent wear debris from entering the surrounding tissue and check tissue ingrowth into the joint. The capsule could contain an art...

journal_title：Biomaterials

authors： Derbyshire B,Skorecki J,Wheble VH

更新日期：1980-01-01 00:00:00