Marovic Danijela, Par Matej, Daničić Paulina, Marošević Ana, Bojo Gloria, Alerić Marta, Antić Svenia, Puljić Krunoslav, Badovinac Ana, Shortall Adrian C, Tarle Zrinka
University of Zagreb School of Dental Medicine, Gundulićeva 5, 10 000 Zagreb, Croatia.
Private Dental Practice, 10 000 Zagreb, Croatia.
Int J Mol Sci. 2025 Mar 20;26(6):2803. doi: 10.3390/ijms26062803.
The first seconds of light curing are crucial for the development of most properties of dental composites, especially for the 3s high-irradiance curing. This study investigated the influence of rapid high-irradiance curing on temporal development of temperature, transmittance and conversion of bulk-fill composites. Four materials were tested: Filtek One (FO), Tetric PowerFill (PFill), Tetric PowerFlow (PFlow) and SDR flow+ (SDR+) and cured with three curing units (LCU): Valo Cordles, Bluephase PowerCure and Translux Wave in 3s (3 W/cm), 10s (1 W/cm) and 20s (1 W/cm) curing protocols. Light transmittance was measured at 2 and 4 mm, while temperature rise and polymerisation kinetics were evaluated at 4 mm depth during 5 min. Both light transmittance and temperature rise were greatest for SDR+ > PFlow > PFill > FO. The 20s curing protocol resulted in the highest degree of conversion (DC) for all materials and LCUs, but also contributed to the greatest temperature rise. Rapid curing with the 3s protocol caused the lowest temperature rise and the shortest time to reach maximum temperature. The polymerisation and temperature kinetics were strongly dependent on the material. The DC of PFill was statistically similar for 3s, 10s or 20s curing with BPC. Rapid curing is only recommended for materials developed for this purpose.
光固化的最初几秒对于牙科复合材料大多数性能的发展至关重要，尤其是对于3秒高辐照固化而言。本研究调查了快速高辐照固化对大块充填复合材料温度、透光率和转化率随时间变化的影响。测试了四种材料：Filtek One（FO）、Tetric PowerFill（PFill）、Tetric PowerFlow（PFlow）和SDR flow+（SDR+），并使用三种固化设备（LCU）进行固化：Valo Cordles、Bluephase PowerCure和Translux Wave，固化方案分别为3秒（3 W/cm）、10秒（1 W/cm）和20秒（1 W/cm）。在2毫米和4毫米处测量透光率，同时在5分钟内评估4毫米深度处的温度升高和聚合动力学。SDR+ > PFlow > PFill > FO的透光率和温度升高均最大。对于所有材料和LCU，20秒的固化方案导致最高的转化率（DC），但也导致最大的温度升高。3秒方案的快速固化导致最低的温度升高和达到最高温度的最短时间。聚合和温度动力学强烈依赖于材料。使用BPC进行3秒、10秒或20秒固化时，PFill的DC在统计学上相似。仅建议对为此目的开发的材料进行快速固化。
