本文選題：復(fù)合樹脂　切入點(diǎn)：引發(fā)劑　出處：《吉林大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

【摘要】：由有機(jī)樹脂基質(zhì)、引發(fā)劑體系和無機(jī)填料組成的牙科復(fù)合樹脂是一種廣泛用于口腔臨床的充填材料,以雙酚A-雙甲基丙烯酸縮水甘油酯(Bisphenol A-glycidyl methacrylate,Bis-GMA)作為樹脂基質(zhì)單體的牙科復(fù)合樹脂充填材料是牙體缺損充填治療的首選材料。由于牙科復(fù)合樹脂充填材料具有良好的粘結(jié)性能,它可以保留更多的牙體組織,滿足患者對美觀的要求;但是它在口腔環(huán)境中使用一段時(shí)間后會(huì)出現(xiàn)各種問題,其中發(fā)生率最大的是牙體組織繼發(fā)齲以及充填材料出現(xiàn)磨損折斷,主要原因?yàn)槌涮畈牧系木酆鲜湛s及其與牙體組織的機(jī)械性能不匹配,因此,研究者不斷研究開發(fā)新材料以期替代當(dāng)前樹脂[1,2],低收縮高機(jī)械性能的復(fù)合樹脂的研制成為當(dāng)前研究熱點(diǎn),對當(dāng)前廣泛應(yīng)用的樹脂單體BisGMA的改性以及合成新型樹脂單體是研究方向之一。本課題組在前期設(shè)計(jì)合成了一種新型丙烯酸酯類牙科樹脂基質(zhì)單體--3,3′,5,5′-四甲基聯(lián)苯二酚型環(huán)氧丙烯酸酯(TMBPEA),單體結(jié)構(gòu)的聯(lián)苯結(jié)構(gòu)提高了聚合物的剛性,且減小在聚合過程中得空間構(gòu)象變化。該研究以Bis-GMA單體作為對照組,發(fā)現(xiàn)以TMBPEA單體為基質(zhì)的樹脂基質(zhì)體系固化后聚合收縮小,而且抗彎強(qiáng)度高,但二者雙鍵轉(zhuǎn)化率在統(tǒng)計(jì)學(xué)上無顯著性差異。雙鍵轉(zhuǎn)化率的大小與樹脂材料的性能密切相關(guān),轉(zhuǎn)化率較高的材料交聯(lián)密度大,內(nèi)部結(jié)構(gòu)更加緊湊,可以提高機(jī)械性能,且材料不易變色,同時(shí)將提高材料的硬度,耐磨性和生物安全性。聚合雙鍵轉(zhuǎn)化率影響因素:單體、引發(fā)劑、固化方式及時(shí)間,在這三種因素中引發(fā)劑的種類及含量是至關(guān)重要的,引發(fā)劑在接收適當(dāng)光波范圍內(nèi)的光照下能夠直接使樹脂從黏性液態(tài)體系轉(zhuǎn)變?yōu)楣虘B(tài),轉(zhuǎn)變的速率及程度均與引發(fā)劑有直接關(guān)系,因此,本研究將引入一種新的引發(fā)劑PPD,探討不同引發(fā)劑對以TMBPEA為單體的樹脂基質(zhì)共聚體系雙鍵轉(zhuǎn)化率的影響,以期通過新型引發(fā)劑提高該體系的雙鍵轉(zhuǎn)化率,從而進(jìn)一步提高材料的力學(xué)性能。實(shí)驗(yàn)方法:將單體(TMBPEA)、稀釋劑(雙甲基丙烯酸二縮三乙二醇酯TEGDMA)、引發(fā)劑、助引發(fā)劑混合均勻形成樹脂基質(zhì)體系,共聚體系中單體與稀釋劑的比例是7:3,引發(fā)劑與助引發(fā)劑比例為1:1;實(shí)驗(yàn)根據(jù)引發(fā)劑不同成分和比例分組:PPD組:以1%的PPD為引發(fā)劑;PPD+CQ組:按照CQ:PPD質(zhì)量比1:1聯(lián)合應(yīng)用作為引發(fā)劑;對照組:以1%的CQ為引發(fā)劑。分別測定三組樣品的雙鍵轉(zhuǎn)化率、聚合收縮和機(jī)械性能(參照牙科行業(yè)相關(guān)標(biāo)準(zhǔn))。結(jié)果:PPD組聚合轉(zhuǎn)化率、機(jī)械性能均優(yōu)于CQ體系,而PPD+CQ組復(fù)合樹脂體系聚合轉(zhuǎn)化率、聚合收縮、機(jī)械性能均優(yōu)于CQ體系,PPD+CQ組復(fù)合樹脂體系與PPD相比雖然機(jī)械性能無統(tǒng)計(jì)學(xué)差異,但是聚合轉(zhuǎn)化率、聚合收縮性能均優(yōu)于PPD體系(p0.05)。結(jié)論:PPD是一種性能較理想的引發(fā)劑,且PPD與CQ聯(lián)合應(yīng)用能夠協(xié)同提高樹脂基質(zhì)體系的雙鍵轉(zhuǎn)化率,又進(jìn)一步提高了樹脂的各種性能,具有良好的臨床應(yīng)用前景。
[Abstract]:The organic resin matrix, causing dental composite resin and inorganic filler agent system is a widely used dental filling materials, with bisphenol A- bis glycidyl methacrylate (Bisphenol A-glycidyl, methacrylate, Bis-GMA) as a dental composite resin filling material matrix resin monomer is the preferred material for filling tooth defect because of dental composite resin filling material has good bonding properties, it can retain the teeth more, meet the aesthetic requirements of patients; but it is used for a period of time in the oral environment after the emergence of various problems, which is the largest incidence of wear broken tooth caries and filling materials, mainly the reason for the polymerization shrinkage of filling materials and the mechanical properties of dental tissues do not match, therefore, researchers continue to research and development of new materials to replace the The development of composite resin [1,2] resin with high mechanical properties and low shrinkage has become a hotspot of current research, the resin monomer BisGMA is widely used in the modification and synthesis of novel resin monomer is one of the research directions of the research group. A new type of acrylic dental resin matrix monomer --3,3 'synthesis in the design stage, 5,5 four' - methyl biphenol epoxy acrylate (TMBPEA), biphenyl monomer structure improves the rigidity of the polymers, and reduce the space conformation changes during the polymerization process. The research is based on the Bis-GMA monomer as the control group, the TMBPEA monomer for curing resin matrix system matrix after polymerization shrinkage, but the bending strength is high, but the two double bond conversion, there were no statistically significant differences in size. Performance is closely related with the resin material double bond conversion rate, conversion rate higher crosslinking density is large, The internal structure is more compact, can improve the mechanical properties, and the material is not easy to change, at the same time will increase the hardness, wear resistance and biocompatibility. Double bond polymerization conversion factors: monomer, initiator and curing time in these three factors lead to the type and content of agent is crucial. The resin can directly trigger from viscous liquid system into solid agent in receiving appropriate light within the scope of the light, the rate and extent of change and the initiator has a direct relationship, therefore, this study will introduce a new initiator PPD, to investigate the different influence of initiators on TMBPEA resin matrix copolymerization system double bond monomer conversion rate, in order to improve the system of the new initiator of the double bond conversion rate, so as to further improve the mechanical properties of materials. Methods: monomer (TMBPEA), diluent (double methacrylic acid two shrink Triethylene glycol ester TEGDMA), initiator, CO initiator mixture forming resin matrix system, 7:3 is a monomer in the copolymerization system and diluent ratio, initiator and initiator ratio of 1:1; experiment according to the initiator of different composition and proportion of group: PPD group with 1% PPD as initiator; PPD+CQ group according to the mass ratio of CQ:PPD 1:1 combined application as initiator; control group: 1% CQ as initiator. Three groups of samples were measured by double bond conversion, polymerization shrinkage and mechanical properties (refer to the dental industry standards). Results: in group PPD, polymerization conversion, mechanical properties are better than that of CQ system, and the PPD+CQ group composite resin polymerization conversion rate, polymerization shrinkage, mechanical properties are better than that of CQ system, PPD+CQ group compared with PPD composite resin system although the mechanical properties of no significant difference, but the conversion rate, polymerization shrinkage properties are better than the PPD system (P0.05). Conclusion: PPD An ideal initiator is available. Combined application of PPD and CQ can improve the double bond transformation rate of resin matrix system, and further improve various properties of resin, so it has good clinical application prospect.

【學(xué)位授予單位】：吉林大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：R783.1

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