Walter Ricardo, Boushell Lee W, Heymann Harald O, Ritter Andre V, Sturdevant John R, Wilder Aldridge D, Chung Yunro, Swift Edward J
Department of Preventive and Restorative Sciences, University of Pennsylvania School of Dental Medicine, Philadelphia, PA, USA.
J Esthet Restor Dent. 2014 May-Jun;26(3):179-90. doi: 10.1111/jerd.12077. Epub 2013 Dec 18.
Composite resins are still outperformed by amalgams in the clinical practice with secondary caries and fractures being their most common failures. A material that suffers less polymerization shrinkage might improve the clinical performance of composite resins.
To evaluate the clinical performance of a low-shrink silorane-based composite resin (Filtek LS Low Shrink Posterior Restorative, 3M ESPE, St. Paul, MN, USA) in comparison with a methacrylate-based composite resin (Tetric EvoCeram, Ivoclar Vivadent, Schaan, Principality of Liechtenstein) over time.
Candidates in need of Class II composite resin restorations participated in this randomized controlled clinical trial. Those were 25 female and six male subjects with average age of 44.3 ± 12.7 years. Participants received 82 restorations, being 54 in premolars and 28 in molars. Procedures, which included the restoration of primary caries lesions or replacement of failing restorations, were done using modified preparations with no bevels or additional retention. Restorations were placed using Filtek LS (and dedicated self-etch adhesive) or Tetric EvoCeram (with AdheSE, Ivoclar Vivadent), following manufacturers' instructions. Incremental placement technique was applied and the restorations were immediately finished. Follow-up evaluations occurred at six, 12, 24, and 36 months and were done using the Fédération Dentaire Internationale criteria. Statistical analysis was performed using generalized estimating equations.
The recall rate at 36 months was 89%. All interaction terms were not significant.
Filtek LS performs as well as Tetric EvoCeram performs in the clinical setting at 36 months.
The silorane-based composite resin Filtek LS and the conventional methacrylate-based composite resin Tetric EvoCeram performed similarly well in posterior restorations over at least 36 months of clinical service.
在临床实践中，复合树脂在继发龋和骨折方面仍逊于汞合金，这是其最常见的失败情况。一种聚合收缩较小的材料可能会改善复合树脂的临床性能。
评估一种低收缩率的硅氧烷基复合树脂（Filtek LS低收缩后牙修复材料，3M ESPE，美国明尼苏达州圣保罗）与甲基丙烯酸酯基复合树脂（Tetric EvoCeram，义获嘉伟瓦登特，列支敦士登公国沙恩）随时间推移的临床性能。
需要进行II类复合树脂修复的患者参与了这项随机对照临床试验。共有25名女性和6名男性受试者，平均年龄为44.3±12.7岁。参与者接受了82颗牙齿的修复，其中前磨牙54颗，磨牙28颗。修复程序包括对原发性龋损进行修复或替换失败的修复体，采用无斜面或额外固位的改良制备方法。按照制造商的说明，使用Filtek LS（和专用自酸蚀粘结剂）或Tetric EvoCeram（与AdheSE，义获嘉伟瓦登特）进行修复体的放置。采用分层放置技术，修复体立即完成。在6个月、12个月、24个月和36个月进行随访评估，使用国际牙科联合会标准。使用广义估计方程进行统计分析。
36个月时的召回率为89%。所有交互项均无统计学意义。
在36个月的临床环境中，Filtek LS的表现与Tetric EvoCeram相当。
基于硅氧烷的复合树脂Filtek LS和传统的基于甲基丙烯酸酯的复合树脂Tetric EvoCeram在至少36个月的后牙修复临床服务中表现相似。
