三种修复方法用于楔状缺损修复的疗效评价

目的 比较玻璃离子水门汀、复合树脂及联用两种材料用于楔状缺损修复的远期临床疗效。方法 89例360颗楔状缺损牙分别用玻璃离子水门汀、复合树脂和联用两种材料修复。于修复后1、2及3年,比较成功率等指标情况。结果 玻璃离子水门汀防龋性和黏结性优于复合树脂,复合树脂的色彩稳定性优于玻璃离子水门汀;3年后,联用组临床成功率为88.6％高于玻璃离子水门汀组(74.8％)或复合树脂组(7.6％),差异显著(P<0.05)。结论 玻璃离子水门汀和复合树脂联用优于单独充填。     

玻璃离子水门汀与纳米树脂充填乳牙邻面龋的效果比较

目的 比较玻璃离子水门汀与纳米树脂充填乳牙邻面龋的效果.方法 选择来我科就诊的年龄为5～8岁的乳磨牙邻面龋102例,共320颗患牙,其中深龋组204颗,中、浅龋组116颗,每组随机分为富士Ⅸ玻璃离子水门汀充填(A组)和光固化纳米树脂充填(B组).深龋A组采用氢氧化钙盖髓玻璃离子水门汀充填,深龋B组采用氢氧化钙盖髓,玻璃离子水门汀垫底后纳米树脂充填;中浅龋A组直接玻璃离子水门汀充填,B组中龋玻璃离子水门汀垫底后纳米树脂充填,浅龋直接纳米树脂充填.分别在3个月、6个月、1年时复查充填效果,比较两组成功率.结果 深龋组2种材料在各个时间段成功率均无统计学差异(P＞0.05),中、浅龋组2种材料在3个月时两组成功率无统计学差异(P＞0.05),但在6个月和1年时纳米树脂充填组成功率优于玻璃离子水门汀充填组(P＜0.05).结论 光固化纳米树脂是临床上充填乳牙易脱落之邻面龋较好的选择.     

玻璃离子水门汀充填术后脱落的原因及预防

玻璃离子水门汀(本文所述的是基层医院常用的上海青浦齿科材料厂生产的玻璃离子水门汀)是一种常用的乳牙窝洞充填材料,调拌和充填比较方便,色泽和耐磨性均较好。但是,我们在临床工作中也发现玻璃离子水门汀充填术后脱落的现象比较常见,为此,我们以几种常见的玻璃离子水门汀充填术后脱落原因为例进行分析,希望能给广大临床医生有所帮助。     

新型牙科修复材料—光固化单组分复合体应用疗效观察

玻璃离子水门汀自1972年应用于牙科以来,以其可释放氟、对牙本质和牙釉质均有粘结性、热膨胀系数与牙本质相近、生物相容性好等优点,已广泛应用作垫底材料。[1]近年来,牙科玻璃离子水门汀发展很快,传统型玻璃离子水门汀已不能满足临床使用要求,出现了一些新型玻璃离子水门汀,如树脂改性型玻璃离子水门汀,其性能得到了较大的提高,可用作牙科充填材料。近年来,由美国登士柏公司推出的光固化单组分复合体(简称Ｄｙｒａｃｔ)是继玻璃离子粘固剂和光固化复合树脂之后又一新型牙科充填材料,它集这两种材料的优点为一体[2-4],以其优异的物理性能和…     

老年根龋保存治疗临床效果报告

目的:观察玻璃离子水门汀和光固化复合树脂充填治疗老年根龋的临床效果.方法:对65岁以上老年人284颗根龋牙,按就诊顺序半随机分成两组,分别接受两种材料充填治疗.结果:1年时,玻璃离子水门汀、光固化复合树脂充填总有效率分别为91.39%、77.27%、统计分析,相差有显著性(P＜0.05).结论:玻璃离子水门汀与光固化复合树脂修复根龋临床效果比较,玻璃离子水门汀疗效优于光固化复合树脂.     

不同根尖倒充填材料的微渗漏研究

目的 评价MTA、玻璃离子水门汀、复合树脂3种根尖倒充填材料根尖封闭性能.方法 60颗实验牙沿釉牙骨质界截冠,冷侧压法充填根管后,切除根尖3 mm.实验组超声倒预备3 mm,分别以MTA、玻璃离子水门汀、复合树脂做倒充填,固化后上段取出牙胶.对照组保留根尖3 mm牙胶.连接于改良葡萄糖定量检测微渗漏模型,分别在1、2、4、7、10、15、20、30 d测定从冠方向根方渗漏的葡萄糖的量.结果 MTA、玻璃离子水门汀、复合树脂3种材料葡萄糖渗漏量均小于0.60 μl/24 h,从第4 d起,MTA的渗漏量显著低于玻璃离子水门汀和复合树脂(P＜0.05).结论 MTA、玻璃离子水门汀、复合树脂3种材料短期内的根尖封闭性均较好,MTA优于其它两种材料.     

玻璃离子水门汀临床应用

<正> 玻璃离子水门汀充填材料(日本松风公司生产),适合于各类洞型的充填。我们自2000年1月～2001年1月采用玻璃离子水门汀治疗患牙108例,疗效满意,报告如下。     

老年人根面龋3种材料修复的疗效分析

目的:探讨修复老年人根面龋较理想的材料。方法:将216颗根面龋患牙,分别采用Dyract复合体、光固化复合树脂和玻璃离子水门汀充填修复。随访观察1-2年。结果:观察1年,3种材料修复成功率有显著性差异,Dyract复合体成功率(96.2%)最高;观察2年,Dyract复合体成功率94.9%,明显高于玻璃离子水门汀的成功率77.9%(P<0.01)和光固化复合树脂的成功率61.4%(P<0.01),差异均具有显著性。结论:Dyract复合体是修复根面龋较为理想的材料。     

比较6种口腔材料对体外生物膜形成的影响

目的比较体外混合菌在不同充填材料表面形成早期生物膜的能力,探讨生物膜状态下不同充填材料细菌形成的差异。方法用6种不同修复材料按临床比例制成试件各3件,将各试件放入国际标准菌株牙龈卟啉单胞菌、具核梭杆菌、伴放线放线杆菌、粘性放线菌、血链球菌、变形链球菌混合培养24h,使之在试件表面形成生物膜。在激光共聚焦扫描显微镜(LCSM)下观察生物膜厚度和平均荧光强度,比较不同充填材料表面生物膜细菌形成的差异。结果形成的生物膜平均厚度依次为聚羧酸锌水门汀>磷酸锌水门汀>玻璃离子体水门汀>复合树脂>银汞合金>富士Ⅱ型玻璃离子水门汀。组间比较发现:四种充填材料生物膜厚度无统计学的差异,富士Ⅱ型玻璃离子水门汀、银汞合金的生物膜厚度与两种垫底材料之间都有显著性差异,复合树脂、玻璃离子体水门汀、磷酸锌水门汀的生物膜厚度与聚羧酸锌水门汀有显著性差异。结论材料表面形成的不同生物膜厚度提示:富士Ⅱ型玻璃离子水门汀、银汞合金具有较强的抑制生物膜形成的能力。     

各种充填材料修复牙齿颈根部龋的微漏研究

选择临床上常用的银汞合金、进口或国产玻璃离子水门汀、银合金粉玻璃离子水门汀和光固化复合树脂作充填材料,采用染料逆扩散法,测出牙齿浸出液中曙红的含量,观察充填材料与牙齿颈根部微漏的情况。观察结果表明,GC玻璃离子水门汀与牙齿颈根部组织粘接最好,其次为国产玻璃离子水门汀、复合树脂、银粉玻璃离子水门汀、银汞合金。     

Cytotoxicity of resin-based restorative materials on human pulp cell cultures

OBJECTIVE: The objective of this study was to determine the cytocompatibility of 5 different extracts of resin-based restorative materials (2 resin-modified glass ionomer cements, 1 compomer, and 2 composite resins) on human pulp cells. STUDY DESIGN: Set specimens from 2 resin-modified glass-ionomer cements (Fuji II LC and Fuji IX), 1 compomer (Dyract), and 2 composite resins (Tetric and Superfil) were eluted with culture medium for 2 and 5 days. The effects of resin-based restorative materials on human pulp cells were evaluated with cytotoxicity and mitochondrial activity assays. RESULTS: The results showed that the eluates from resin-modified glass-ionomer, compomer, and composite resins were cytotoxic to primary human pulp cells. In addition, Superfil, Fuji IX, and Tetric demonstrated an inhibitory effect on mitochondrial activity of human pulp cells. It was found that composite resin Superfil was the most toxic restorative material among the chemicals tested. CONCLUSION: The influence of the cytotoxicity depended on the materials tested. Compomer or light-curing resin-modified glass ionomer may initially react more favorably to pulp cells.     

Shear bond strength of resin-modified restorative glass-ionomer cements to dentin--an in vitro study

An in vitro study was carried out on 40 periodontally involved, caries free human maxillary and mandibular molars to evaluate shear bond strength of resin- modified restorative glass-ionomer cements to dentin. Teeth were divided into four groups, Group I--Fuji II (Conventional glass ionomer) Group II (Fuji II LC), Group III (Vitremer), Group IV (Geristore). Shear bond strength was tested using a transaxial testing machine. Results showed that shear bond strength of all resin-modified restorative glass-ionomer cements was higher than conventional glass ionomer (Fuji II) tested. No statistical difference was found between Fuji II LC and Geristore. However, bond strength of Vitremer was lower than Fuji II LC and Geristore but higher than Fuji II.     

Inhibition of artificial secondary caries in root by fluoride-releasing restorative materials

This investigation evaluated the fluoride-releasing properties of various fluoride-releasing restorative materials, including resin-modified glass-ionomer cements (Fuji ionomer TypeII LC, Photac-Fil Aplicap, Vitremer), compomers (Ionosit FIL, Compoglass, Dyract) and fluoride-releasing resin composites (Heliomolar radiopaque, Degufill mineral). The study also estimated the effects of those materials on the inhibition of artificial secondary caries around restorations using a bacterial caries-inducing system. The amount of fluoride released from the materials in deionized water was measured every one week for 10 weeks. Class V cavities with the gingival margin located in the root were prepared in extracted human premolars and restored with each of the materials. The restored teeth were incubated in the bacterial artificial caries chamber, and the artificial lesion created around the restoration was observed microradiographically. The resin-modified glass-ionomer cements released the largest amount of fluoride and created a thick radio-opaque zone in the artificial lesion along the restoration-dentin interface. These results indicated that the fluoride-releasing restorative materials have the potential to inhibit secondary caries formation around restorations. Resin-modified glass-ionomer cements presented a particularly strong effect, compared with compomers and fluoride-releasing resin composites.     

Fluoride release from a new glass-ionomer cement

This study compared the amount and pattern of fluoride release from a new glass-ionomer-based material (nano-ionomer) with other restorative materials and correlated the surface area to volume of nano-sized filler with its capacity to release fluoride in the powder, more quickly increasing the fluoride. The materials evaluated were a nano-ionomer (Ketac N 100), a conventional glass-ionomer cement (GC Fuji II), a resin-modified glass ionomer cement (GC Fuji II LC), a compomer (Dyract F) and a fluoride-releasing resin composite (Tetric N Flow). A resin composite (Synergy Flow) served as the control. Ten specimens were fabricated from each of these materials using a customized metal mold. The fluoride release was measured every 24 hours for the first seven days, and on days 14, 21 and 28, a combination fluoride ion—selective electrode connected to an ion analyzer. The data was analyzed by one-way ANOVA and Tukey HSD test (p=0.05). An initial fluoride “burst effect” was seen with all of the materials, except for the control and compomer. The conventional glass-ionomer cement showed the highest fluoride release on the first three days. The nano-ionomer showed the maximum release of fluoride for the remaining days. A low constant level of fluoride release was seen from the compomer and fluoride-releasing resin composite throughout the study period.     

Fluoride release and antibacterial properties of new-generation tooth-colored restoratives

The aim of this study was to compare the amounts and pattern of fluoride release and antibacterial properties of new-generation restoratives over a 35-day period. Materials evaluated included fluoride-releasing composites (Tetric, Experimental X), compomers (Dyract, Compoglass), and a resin-modified glass-ionomer cement (Fuji II LC). A conventional glass ionomer (Fuji II Cap) was used as a control for fluoride-release testing. Five samples of each restorative material were evaluated for daily fluoride release over a 35-day period by means of ion chromatography. Ranking of materials from least to greatest total fluoride release over 35 days was as follows: Tetric < Experimental X < Dyract < Fuji II LC < Compoglass < Fuji II Cap. Fuji II Cap had significantly greater fluoride release than all other materials evaluated. Fuji II Cap, Fuji II LC, and Compoglass had similar patterns of fluoride release characterized by a high initial release that was many times that released later. The fluoride-releasing composites evaluated stopped releasing fluoride by day 14. Antibacterial testing was conducted using the agar diffusion inhibitory test. Five samples of each restorative were assessed at baseline and weekly intervals up to 35 days. The microorganisms used were Lactobacillus casei, Streptococcus mutans, and Streptococcus sobrinus. IRM, a zinc oxide/eugenol cement, was used as the baseline control. None of the restorative materials evaluated affected the growth of L casei, S sobrinus, or S mutans at all time periods including baseline, where fluoride was detected in the agar beneath the specimen disks. There was no correlation noted between fluoride-release potential and antibacterial properties.     

粘接界面处理对玻璃离子水门汀与复合树脂粘接强度的影响

目的 比较4种粘接剂对2种不同类型玻璃离子水门汀与复合树脂界面间粘接强度的影响.方法 选取传统型高强度玻璃离子FujiⅨ(F9)和树脂改良型玻璃离子FujiⅡLC(F2LC)为研究对象,将100个样本随机分为10组,每组10个样本,在样本中央制备窝洞后,随机选取5组样本,窝洞内置入F9,另外5组置入F2LC.样本界面分别采取不处理和4种不同类型的粘接剂,Clearfil SE Bond(SEB)、Clearfil S3 Bond(S3B)、Optibond Versa(OBV)及Single Bond 2(SB2)处理后,分别测定各组样本的剪切粘接强度.结果 OBV处理组的F9样本组获得最大的剪切粘结强度,未进行界面处理的F9样本组剪切粘结强度最小,其差异具有显著统计学意义.使用粘接剂处理后各组的粘接强度均显著增高.结论 粘接剂处理样本界面后显著提高玻璃离子与复合树脂间的粘接强度.自酸蚀粘接剂OBV使玻璃离子与复合树脂界面获得最大的粘接强度.     

Fluoride release and uptake by aged resin-modified glass ionomers and a polyacid-modified resin composite

Little has been reported of the relationship of fluoride release and weight loss, and the effects of use of different fluoride agents on restorations, for the new generation of glass ionomer cements. The objectives of this study were to compare fluoride release of fresh and aged specimens of a polyacid-modified resin composite (Dyract), and of three resin-modified glass ionomer cements (Fuji II LC, Photac-Fil, Vitremer); and to correlate fluoride release and weight loss of aged specimens after recharging with three different fluoride agents. All materials showed high initial fluoride release immediately after uptake when using the agents. However, the levels of fluoride release dropped rapidly soon afterwards. Although initial fluoride release was significantly different between Dyract and the three resin-modified glass ionomers, when different fluoride agents were used on aged specimens after recharging, no significant differences were found after the first few hours. Linear regression analyses also showed no correlation between cumulative fluoride release and weight loss. Possible beneficial oral health effects may only be expected by frequent exposure of these materials to fluoride agents.     

Fluoride release of glass ionomer-based luting cements in vitro.

STATEMENT OF PROBLEM: There is considerable variation in generic formulation and in reported fluoride release from resin-modified glass ionomer luting cements. PURPOSE: This study compared fluoride release from 2 generically similar resin-modified glass ionomer luting cements (Vitremer and Advance) with release from 2 conventional glass ionomer luting cements (Ketac-Cem and Fuji I). MATERIAL AND METHODS: Ten specimen disks of each of the 4 luting cements were fabricated and immersed in deionized water in individual polystyrene jars. The jars were stored in a humidor at 37 degrees C between test periods. At the same time each day, for 28 days, fluoride release from each specimen disk was measured in parts per million by testing the storage water. RESULTS: The 4 luting cements tested showed an initial high concentration of fluoride release during the first week, followed by a gradual decrease over the study period. Vitremer luting cement demonstrated the greatest mean cumulative fluoride release in parts per million over the study period (198), followed by Fuji I (140), Ketac-Cem (110), and Advance (99) luting cements. CONCLUSIONS: Resin-modified glass ionomer luting cements showed fluoride release comparable to the conventional glass ionomer luting cements. Vitremer luting cement released more fluoride over the 28-day period than the other cements.     

一种复合体和四种树脂化玻璃离子水门汀的氟离子释放测定

目的 比较１种复合体和４种树脂化玻璃离子水门汀在水中释放氟离子的能力。方法 用氟离子选择电极，分别在第１、７、３０ｄ直径２５３ｄ，５种材料固化后标本浸泡训的氟离子浓度。结果 除复合体以外的所有材料，均显示了高的初期氟离子释入并急剧下降，然后缓慢下降。结论 复合体释放的氟离子比树脂化玻璃离子水门汀少。对于龋病高发的患者，选择高氟离子释放的树脂化玻璃离子水门汀材料较好。     

Inhibition of demineralization in vitro around fluoride releasing materials

Replacement of restorations because of secondary caries is a continuing problem in restorative dentistry. This investigation assessed the capacity of fluoride-releasing restorative materials to resist caries in vitro when used in roots. Class 5 cavities were prepared in buccal and lingual surfaces of 30 extracted premolars and restored with one of three polyacid modified resin composites (F-2000, Hytac and Compoglass F), a resin modified glass-ionomer cement (Fuji II LC) a conventional glass ionomer (Ketac-Fil), and a resin composite (Z-100). After 5 weeks in an acid gel for caries-like lesion formation, the teeth were sectioned longitudinally and examined with polarized light. The results showed that restoration of caries with polyacid modified resin composites and resin modified glass ionomer cements may be of great importance in the prevention of secondary caries around the restorations in roots. Clinical Relevance Light cured fluoride-releasing restorations may inhibit caries-like lesions. Inhibition of demineralization in vitro around fluoride releasing materials.