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    Antibacterial sponges for use in endodontic procedures and methods of use
    251.
    发明申请
    Antibacterial sponges for use in endodontic procedures and methods of use 审中-公开
    用于根管手术和使用方法的抗菌海绵

    公开(公告)号：US20040053201A1

    公开(公告)日：2004-03-18

    申请号：US10245085

    申请日：2002-09-17

    Inventor： Joseph S. Dovgan

    IPC: A61C005/02

    CPC classification number: A61K6/0032 ,  A61C5/40 ,  A61C19/063 ,  C08L89/06 ,  C08L29/04 ,  C08L23/06 ,  C08L23/12 ,  C08L1/00 ,  C08L2201/06

    Abstract: A method for preventing infections during an endodontic procedure comprises removing pulp material from a pulp canal and inserting a temporary antibacterial material, such as a sponge or pellet, into the resulting pulp cavity. The antibacterial material comprises an absorbent material embedded with an antibacterial composition. Optional components that can also be embedded in the antibacterial material include hemostatic agents, colorants, and radiopaque materials. A temporary restoration is applied over the pulp canal and antibacterial material for a desired time period, after which the temporary restoration and antibacterial sponge are removed and a permanent filling is introduced into the root canal and a permanent restoration is attached to the tooth. Because temporary restorations often leak bacteria-laden saliva, the antibacterial sponge prevents infections arising from such bacteria while the temporary restoration is in place.

    Abstract translation: 用于在牙髓治疗过程中预防感染的方法包括从纸浆管中除去纸浆材料，并将临时的抗菌材料（例如海绵或丸粒）插入到所得的纸浆腔中。 抗菌材料包含嵌入抗菌组合物的吸收材料。 也可以嵌入抗菌材料中的可选组分包括止血剂，着色剂和不透射线的材料。 在纸浆管和抗菌材料上施用临时恢复期望的时间段，然后除去临时恢复和抗菌海绵，并将永久填充物引入根管中，并将永久性恢复器附着到牙齿上。 因为临时的修复体经常会泄漏含有细菌的唾液，所以抗菌海绵可以防止这种细菌引起的感染，而临时恢复就位。

    Process for the preparation of biodegradable resin
    253.
    发明申请
    Process for the preparation of biodegradable resin 审中-公开
    生物降解树脂的制备方法

    公开(公告)号：US20030092793A1

    公开(公告)日：2003-05-15

    申请号：US10187850

    申请日：2002-07-03

    Applicant: TIANJIN DANHAI CO., LTD

    Inventor： Jiafan Liu ,  Shipu Quan

    IPC: C08K003/00

    CPC classification number: C08L3/02 ,  C08L23/02 ,  C08L2201/06 ,  C08L2666/02 ,  C08L2666/26

    Abstract: Disclosed is a process for preparation of biodegradable resin. The process comprises dehydrating a starch in a dehydrating kettle to a moisture less than 0.5%; finely granulating the dehydrated starch slurry to an average granule size below 10 nullm; centrifuging the starch slurry to obtain a filter cake; adding to the centrifuged starch 0.5-5 wt % of a coupling agent and 0.5-7.5 wt % of a lubricant, based on the weight of dehydrated starch for modification; feeding the modified starch, 25-80 wt % of a thermoplastic resin, 1-10 wt % of a plasticizing agent, 0.5-7.5 wt % of a lubricant and 1-15 wt % of a degradation promoter, based on the weight of dehydrated starch, into a mixer and mixing them for 10-30 minutes under stirring, and then discharging them; extrusion-pelletizing the discharged material via a twin-screw extruder, the screws of which have length to diameter ratio of 40-48:1 and are of degassing function, at a temperature of 100-290null C. The advantages of the present invention reside in widely available raw materials, simple process technology, easy industrial practice, low production cost and excellent biodegradability of the biodegradable resin.

    Abstract translation: 公开了一种制备可生物降解树脂的方法。 该方法包括将脱水釜中的淀粉脱水至小于0.5％的水分; 将脱水淀粉浆料精细制粒至10μm以下的平均颗粒尺寸; 离心淀粉浆，得到滤饼; 加入离心淀粉0.5-5重量％的偶联剂和0.5-7.5重量％的润滑剂，基于用于改性的脱水淀粉的重量; 将改性淀粉，25-80重量％的热塑性树脂，1-10重量％的增塑剂，0.5-7.5重量％的润滑剂和1-15重量％的降解促进剂，基于脱水的 淀粉加入混合器中并搅拌混合10-30分钟，然后将其排出; 在100-290℃的温度下，通过双螺杆挤出机挤压造粒排出的材料，该双螺杆挤出机的长度比直径比为40-48:1，具有脱气功能。本发明的优点 原料广泛，生产工艺简单，工业实践简单，生产成本低，生物降解树脂生物降解优良。

    Biodegradable polymeric composition
    256.
    发明授权
    Biodegradable polymeric composition 有权
    可生物降解的聚合物组合物

    公开(公告)号：US06277899B1

    公开(公告)日：2001-08-21

    申请号：US09428070

    申请日：1999-10-27

    Applicant: Catia Bastioli ,  Vittorio Bellotti ,  Roberto Lombi ,  Matteo Nicolini

    Inventor： Catia Bastioli ,  Vittorio Bellotti ,  Roberto Lombi ,  Matteo Nicolini

    IPC: C08L300

    CPC classification number: C08L3/00 ,  C08K5/0008 ,  C08L97/02 ,  C08L101/00 ,  C08L2201/06 ,  C08L2666/02 ,  C08L2666/26

    Abstract: A polymeric composition comprising a filler melt-dispersed in a matrix comprising, a destructurized starch component; a synthetic thermoplastic polymeric component selected from the group consisting of polyvinylalcohol, polyvinyl acetate, thermoplastic polyesters and graft copolymers of polysaccharides; and a fluidizing agent selected from the group consisting of C12-C22 fatty acids, C12-C22 fatty alcohols, esters and amides of said fatty acids, polyolefin waxes, polyglycol ethers of alditols, polyglycerols esterified with C12-C22 fatty acids, and mixtures thereof, wherein said filler is a mixture of an inorganic filler and a filler of organic nature, wherein the organic filler is present in an amount from 5% to 70% by weight.

    Abstract translation: 一种聚合物组合物，其包含熔体分散在基质中的填料，其包含变性淀粉组分; 选自聚乙烯醇，聚乙酸乙烯酯，热塑性聚酯和多糖的接枝共聚物的合成热塑性聚合物组分; 和选自C12-C22脂肪酸，C12-C22脂肪醇，所述脂肪酸的酯和酰胺，聚烯烃蜡，糖醇的聚乙二醇醚，用C 12 -C 22脂肪酸酯化的聚甘油的流化剂，以及它们的混合物 其中所述填料是无机填料和有机性填料的混合物，其中有机填料的存在量为5重量％至70重量％。

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