摘要:
This invention relates to a method and process for the production of collagen preparations from marine invertebrates and compositions for these preparations. The collagen preparation includes telopeptide and atelopeptide fibrillar collagen of essentially invertebrate type V collagen. The collagen preparations may be used in a variety of medical, dental, cell culture, and food applications.
摘要:
A pharmaceutical composition of a free amine benzophenanthridine alkaloid and a pharmaceutically acceptable carrier is disclosed. The composition is an antibacterial and antifungal agent.
摘要:
The invention provides a denture liner composition for a composite denture based on a phosphonitrilic fluoroelastomer [poly(fluoroalkoxy)phosphazene] curable at atmospheric pressure at temperatures of about 100.degree. C. or less, conveniently by immersing the packed denture flask in a water bath at the appropriate temperature. The composition includes trimethacrylate and dimethacrylate cross-linking agents for increasing liner hardness and decreasing water sorption characteristics of the cured liner. The composition preferably further includes filler materials for increasing the hardness of the liner product. The composite denture is preferably prepared in a one-step process wherein the liner composition material of a single firmness is cured in situ with the denture base material. Alternatively, a firm liner material is cured at the periphery of the denture, and a softer liner material cured at the center; this provides a firm elastic liner adjustable by grinding where soft tissues must be displaced, and a soft elastic liner over bony anatomy, where stresses from chewing are most concentrated and soft tissues are thin. Another possibility lies in curing the soft liner directly to a precured denture as a reline procedure in an pre-existing denture.
摘要:
Methods for the manufacture and repair of dental appliance prostheses are provided comprising providing a shaped metallic underlayment, and plating onto at least a portion of the underlayment a layer of a second metallic species. An amount sufficient substantially to obscure the layer, of a polymerizable opaqueing agent is then applied to the layer. Following polymerization of the opaqueing agent through application of heat or radiant energy, especially visible light, the layer is ideally suited for the application of dental aesthetic veneers or other surfacing materials. In accordance with the preferred embodiment, an adhesion promotion species is employed either in a separate treating step for the second metallic layer or through inclusion thereof in the opaqueing agent.
摘要:
Powder of a ductile, mouth resistant metal such as silver, platinum, palladium, aluminum, or titanium, or an alloy thereof, or a cold weldable, mouth resistant synthetic resin, such as a polyacrylate or methacrylate, polycarbonate or polysulfone is worked to a paste with a plastic organic binder which liquifies at 20.degree. to 45.degree. C. This paste is hardened in the tooth cavity by ultrasonic action.
摘要:
Process for filling dental cavities with radiation curable silaneous adhesives comprising a polymerizable resin comprising at least 20% by weight of a polymerizable silane and optionally up to about 80% by weight of a polymerizable, ethylenically unsaturated material. According to a preferred embodiment, the polymerizable silane is either an acrylosilane or a vinyl silane.
摘要:
A method of improving the surface characteristics of plastics and elastomers which in its preferred aspects includes the steps of forming a bonding or coupling film of an organic silicon compound on the surface of a plastic or elastomeric material and thereafter contacting the film with a compound or a mixture of compounds, or a solution thereof, capable of forming a deposit or coating of silica or silica gel thereon, and articles produced in accordance with the method.