Sajjan Girija S, Dutta Gnana Sindhu, Varma K Madhu, Satish R Kalyan, Pulidindi Anil Kumar, Kolla Vishal Babu
Department of Conservative Dentistry and Endodontics, Vishnu Dental College, Bhimavaram, Andhra Pradesh, India.
J Conserv Dent. 2022 Jan-Feb;25(1):88-92. doi: 10.4103/jcd.jcd_333_21. Epub 2022 May 2.
Bulk-fill composite restorations displayed substantial annual failure related to imperfect marginal adaptation. Although preheated composites improved, marginal adaptation demonstrated early loss of plasticity. A new technique of ultrasonics plasticization was used for fabricating restorations.
The aim of this study was to assess the clinical behavior of bulk-fill composite resin restorations plasticized by preheating and ultrasonics.
Randomized split-mouth double-blinded clinical trial was designed. Bulk-fill composite resin (Tetric N-Ceram Bulk Fill Ivoclar Vivadent products, Delhi) was used to fill 56 cavities. In 28 restorations, composite resin was plasticized by preheating in composite warmer (Delta Co., India) and remaining were plasticized with modified ultrasonic-retreatment tip-RT No 2 (Cricdental, India). Clinical follow-up assessments were done at 6 and 12 months using Ryge's criteria. Mann-Whitney -test was used for statistical analysis with < 0.05 and effect size of 0.61.
Hundred percent clinical success with ultrasonic plasticized group and 95.2% success with preheated composite resin group were observed without statistical significance.
The ultrasonics plasticization of composite resin demonstrated comparable results with that of preheated composite resin after 6- and 12-month recall. Use of vibration energy utilizing the thixotropic effect might have resulted in better clinical performance.
大块充填复合树脂修复体每年都有大量因边缘适应性不佳而导致的失败案例。尽管预热后的复合材料有所改善，但边缘适应性显示出可塑性的早期丧失。一种新的超声塑化技术被用于制作修复体。
本研究的目的是评估经预热和超声塑化的大块充填复合树脂修复体的临床性能。
设计了随机分组双盲临床试验。使用大块充填复合树脂（义获嘉伟瓦登特公司德里产品Tetric N-Ceram Bulk Fill）充填56个窝洞。在28个修复体中，复合树脂在复合树脂加热器（印度德尔塔公司）中预热塑化，其余的用改良的超声再处理尖端RT No 2（印度克里牙科）塑化。使用赖格标准在6个月和12个月时进行临床随访评估。采用曼-惠特尼检验进行统计学分析，显著性水平<0.05，效应大小为0.61。
超声塑化组临床成功率为百分之百，预热复合树脂组成功率为95.2%，两者无统计学差异。
在6个月和12个月的回访后，复合树脂的超声塑化与预热复合树脂显示出相当的结果。利用触变效应使用振动能量可能导致了更好的临床性能。
