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首页> 外文期刊>Journal of dentistry >Clinical longevity of extensive direct composite restorations in amalgam replacement: Up to 3.5 years follow-up
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Clinical longevity of extensive direct composite restorations in amalgam replacement: Up to 3.5 years follow-up

机译：汞合金替代品中广泛直接复合修复的临床寿命：高达3.5年的随访

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Objectives This prospective clinical trial evaluated the longevity of direct resin composite (DRC) restorations made on stained dentin that is exposed upon removal of existing amalgam restorations in extensive cavities with severely reduced macro-mechanical retention for amalgam replacement.Methods Between January 2007 and September 2013, a total of 88 patients (57 women, 31 men; mean age: 51.6 years old) received extensive cusp replacing DRCs (n = 118) in the posterior teeth. DRCs were indicated for replacement of existing amalgam restorations where dentin substrates were stained by amalgam. After employing a three-step total-etch adhesive technique (Quadrant Unibond Primer, Quadrant Unibond Sealer, Cavex), cavities were restored using a hybrid composite (Clearfil Photo Posterior, Kuraray). At baseline and thereafter every 6 months, restorations were checked upon macroscopically visible loss of anatomical contour, marginal discolouration, secondary caries, fractures, debonding and endodontic problems. Restorations were scored as failed if any operative intervention was indicated for repair, partial or total replacement.Results Restorations were observed for a minimum of seven, and maximum 96 months (mean: 40.3 months). In total, four failures were observed due to fracture (n = 1), endodontic complications (n = 2) and inadequate proximal contact (n = 1). Failures were related neither to inadequate adhesion nor to secondary caries. Cumulative survival rate was 96.6% (95% CI: 89-95) up to a mean observation time of 40.3 months (Kaplan-Meier) with an annual failure rate of 0.9%. Conclusion In case of amalgam replacement, dentin that is exposed upon removal of existing amalgam restorations does not impair clinical longevity of extended cusp replacing direct resin composite restorations.Clinical significance Extensive amalgam restorations can be replaced with a variety of treatment options. This clinical study indicates that in such cases directly applied resin based composites offer a reliable and low-cost treatment option, even if dentin is stained by amalgam corrosion products.
机译：目的这项前瞻性临床试验评估了在染色牙本质上进行的直接树脂复合材料（DRC）修复的寿命，该持续的牙本质制造的持续性暴露在广泛的腔内在广泛的腔内进行了较严重的宏观机械保留的宏观机械保留时。2007年1月至2013年9月之间的方法。 ，共有88名患者（57名妇女，31人;意思是年龄：51.6岁）在后牙中收到广泛的尖叫声（n = 118）。表明DRCS用于更换现有的霉菌修复体，其中牙本质底物被Amalgam染色。采用三步全蚀刻粘合技术（象限招底底漆，象限×十字界面，环形），使用杂交复合材料（Clearfil Photo，Kuraray）恢复空腔。在基线和此后每6个月，在解剖轮廓的宏观可见损失，边缘褪色，继发性，裂缝，剥离和牙髓问题上进行修复。如果针对修复的任何手术干预，部分或全面更换，则恢复恢复失败。结果，至少观察到修复七，最高96个月（平均：40.3个月）。总共观察到由于骨折（n = 1），牙髓并发症（n = 2）和近端触点不足（n = 1）。故障既不与粘附性不足，也不是二次龋齿。累积存活率为96.6％（95％CI：89-95），其平均观察时间为40.3个月（Kaplan-Meier），年失败率为0.9％。结论在汞合金替代的情况下，在去除现有的汞合浆修复后暴露的牙本质不会损害延长尖端替代直接树脂复合修复的临床寿命。临床意义广泛的汞合浆修复体可以用各种治疗方案所取代。该临床研究表明，在这种情况下，直接施加的树脂基复合材料提供可靠和低成本的治疗选项，即使牙本质被Amalgam腐蚀产物染色。

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