Dyract光固化复合体与银汞合金充填殆面洞的疗效对比

目的比较Dyract光固化复合体与银汞合金充填     

Dyract光固化复合体与银汞合金充填面洞的疗效对比

目的 :比较Dyract光固化复合体与银汞合金充填 牙合面洞的临床疗效。方法 :应用两种材料分别充填 15 4个患牙 ,随访 1.5～ 2年 ,共复查到 12 8个患牙。从边缘密合度、继发龋、磨耗程度三方面来观察疗效。结果 :Dyract光固化复合体的边缘密合度与是否易发继发龋方面优于银汞合金 (P <0 .0 5 ) ,而耐磨耗程度方面差于银汞合金 (P <0 .0 1)。结论 :Dyract光固化复合体黏性性能良好 ,而在承受咀嚼力上还有欠缺     

复合树脂充填近中(牙合)面洞颈壁边缘微渗漏的研究

目的:比较不同类型树脂充填近中(牙合)面洞的颈壁牙本质-牙骨质边缘微渗漏.方法:在36个新鲜拔除的人上下颌恒磨牙制备近中(牙合)面洞,随机分为3组,分别用3M后牙树脂P60、前后牙通用树脂Z250和纳米树脂z350充填.标本经温度循环,品红染色后,近中远中向沿长轴连续切3片,体视显微镜下观察染料渗漏情况.结果:3组微渗漏由小到大依次为:Z350<72500.05).结论:此3种树脂类型对近中(牙合)面洞颈壁牙本质-牙骨质边缘微渗漏无明显差异.     

调(牙合)对磨牙邻(牙合)面洞银汞合金充填效果的影响

为了探讨调对提高磨牙邻(牙合)面洞银汞合金充填的效果是否有积极的作用,笔者进行了临床对比研究.     

流体静力(牙合)垫与NTI-tss(牙合)垫的研究进展

垫是治疗颞下颌关节紊乱病的主要方法之一,其疗效显著且安全性高,在临床上应用广泛。不同类型垫的适应证与疗效均有不同,本文回顾与介绍了两种较为特殊的垫,即流体静力垫与NTI-tss垫的设计原理、治疗作用和适应证,并将这两种垫与临床上常用的几类传统垫进行比较。     

Dyract AP 光固化复合体与银汞合金治疗恒磨牙龋损的临床比较

目的比较光固化复合体DyractAP与银汞合金治疗恒磨牙龋损的临床效果.方法从临床中选取238例487颗牙髓活力正常的恒磨牙,均患有I类或II类龋损,采用随机抽样方法,分别以DyractAP及银汞合金进行充填治疗.结果实验组疗效优于对照组.经统计学处理差异有显著性(P＜0.01).结论用光固化复合体DyractAP治疗恒磨牙的龋损较传统的银汞合金具有更为理想的效果.     

牙列缺损伴重度(牙合)面磨损(牙合)重建修复的临床研究

目的 通过对不同类型牙列缺损并伴重度(牙合)面磨损的患者进行修复治疗,探讨(牙合)重建的有关问题.方法 选取牙列缺损并伴重度(牙合)面磨损患者69例,制取修复前研究模型,根据不同的缺损类型进行(牙合)垫式可摘局部义齿、固定义齿或固定-可摘义齿联合修复,随访3个月～4年,观察修复治疗效果.结果 患者的咀嚼功能明显改善,有颞下颌关节症状者,症状得到了缓解,无颞下颌关节症状者在咬合升高后未出现新的颞下颌关节症状.结论 对于牙列缺损伴重度(牙合)面磨损患者,(牙合)垫式可摘义齿及固定义齿修复均是(牙合)重建修复的有效方法.     

SYNERGY复合树脂与银汞合金充填Ⅱ类洞的疗效对比

目的 比较SYNERGY复合树脂和银汞合金充填Ⅱ类洞的临床疗效。方法 应用两种材料分别充填Ⅱ类洞,随访两年对牙齿敏感,边缘密合度,He面或邻面形态及修复体折裂等方面作出评价。结果 两种材料充填后He面或邻面形态无显著性差异。而边缘密合度,修复体折裂,牙齿敏感等方面两治疗组间差异显著,前者优于后者。结论 SYNERGY复合树脂的综合性能优于银汞合金,可作为银汞合金的替代材料。     

富士IX玻璃离子与光敏瓷化树脂充填后牙邻(牙合)洞的临床疗效比较

目的:比较富士IX玻璃离子和光敏瓷化树脂充填后牙邻牙合洞的临床疗效。方法:随机选择需要充填的后牙邻牙合面洞型836个牙,常规制备窝洞,分别采用富士IX玻璃离子或光敏瓷化树脂充填窝洞。结果:富士IX玻璃离子和光敏瓷化树脂充填成功率分别为93.6%、96.6%,两组比较无显著性差异(P<0.05)。结论:富士IX玻璃离子和光敏瓷化树脂修复后牙邻牙合面洞效果无显著差异。     

Fracture resistance of mandibular molars with occlusal class I amalgam preparations

The finding that large occlusal Class I restorations weaken premolars is not confirmed for natural mandibular molars because no statistically significant difference was found in the mean loads needed to fracture mandibular molars that were unprepared, minimally prepared, or prepared with a large occlusal amalgam restorations. Similarly, there was no statistically significant change in the amount of force necessary to fracture natural mandibular molars prepared with sharp vs round internal line angles (a no. 56 vs a no. 330 bur). Duplication of the experiment in acrylic resin mandibular molars confirmed the results of a previous experiment by Re and Norling as well as the results relating to sharp vs round internal line angles found in this experiment on natural mandibular molars. Acrylic resin teeth of homogeneous shape and substance overcome some of the sampling problems inherent in obtaining suitable human teeth for testing purposes; however, further testing of this material is indicated.     

Clinical evaluation of a polyacid-modified resin composite (Dyract AP) in class I cavities: 5-year results

PURPOSE: This study evaluated the five-year clinical performance of Dyract AP, a polyacid-modified resin composite, in restorations of Class I carious lesions. MATERIALS AND METHODS: One hundred eight Class I carious lesions in 21 patients were restored with Dyract AP. The lesions, which were macroscopically diagnosed with a probe, involved fissures. The average buccolingual width of the cavities was equal to or less than one-third of the intercuspal width. Restorations were clinically evaluated by two experienced, calibrated examiners at baseline and at 1, 2, 3, 4, and 5 years, utilizing the modified Ryge criteria. The evaluation criteria included color match, marginal discoloration, wear or loss of anatomical form, caries, marginal adaptation, and surface texture. RESULTS: At the end of the 5-year period, a total of 13 restorations had failed, and the cumulative rate of success was 93.37%. By the 5-year recall, 12 restorations had carious lesions adjacent to the margins, and 1 restoration had discoloration that was rated as Charlie. Color changes, marginal discoloration, wear or loss of anatomical form, caries, marginal adaptation, and change in surface texture were found to be statistically significant (p < 0.001) after 5 years. Aside from the thirteen failed restorations, the degrees of color matching, marginal discoloration, wear or loss of anatomical form, caries, marginal adaptation, and surface texture were clinically acceptable at 5 years after treatment. CONCLUSION: At the end of 5 years, Dyract AP exhibited acceptable clinical performance in the treatment of Class I carious lesions. Therefore, it can be considered an alternative material for the restoration of Class I cavities.     

The relationship between mercury from dental amalgam and oral cavity health

The findings presented here suggest that mercury from dental amalgam may play a role in the etiology of oral cavity health. Comparisons between subjects with and without amalgam showed significant differences of diseases of the mouth. Subjects who had amalgams removed reported that symptoms of diminished oral health were improved or eliminated after removal. The data suggest that inorganic mercury from dental amalgam does affect the oral cavity.     

Clinical evaluation of a polyacid-modified resin composite (Dyract AP) in Class I cavities: 3-year results

PURPOSE: This study evaluated the 3-year clinical performance of the polyacid-modified resin composite Dyract AP in restorations for Class I carious lesions. METHODS: 108 Class I cavities in 21 subjects were restored with Dyract AP. The lesions, which were diagnosed macroscopically with a probe, involved fissures and had reached the dentin, while lateral spread was limited and localized to the dentin. The average facio-lingual width of the cavities was equal to or less than one-third the intercuspal width. Restorations were evaluated clinically by two experienced, calibrated examiners at baseline and at 1, 2, and 3 years, according to the modified Ryge criteria, (color match, marginal discoloration, wear or loss of anatomical form, caries, marginal adaptation, and surface texture). RESULTS: None of the restorations failed at the end of the first year. At 2 years, two restorations required immediate replacement due to caries lesions adjacent to the margins. At 3 years, six restorations had caries lesions adjacent to their margins, and the cumulative rate of success was 93.4%. Color changes and marginal discolorations were found to be statistically significant (P < 0.001) at 3 years, although none of the restorations needed to be replaced. Significant differences were also observed in the caries rate (P < 0.001) at 3 years. Aside from the eight failed restorations, the degrees of color matching, marginal discoloration, wear or loss of anatomical form, caries, marginal adaptation, and surface texture were clinically acceptable at 3 years post-treatment.