Adams Kevin R, Savett Daniel A, Lien Wen, Raimondi Christopher, Vandewalle Kraig S
DDS. Maj, USAF, DC. Resident. Advanced Education in General Dentistry Residency. AF Postgraduate Dental School. 1615 Truemper St. Joint Base San Antonio - Lackland, TX, USA, 78236. Uniformed Services University of the Health Sciences, Bethesda, MD, USA.
Col (ret), USAF, DC. Dental Service Point of Contact. Contractor, Axiom Resource. Management, Inc.Dental Program Section - Purchased Care Delivery Branch. TRICARE Health Plan Division. Defense Health Agency (DHA). 2941 Fairview Park Dr # 850, Falls Church, VA, 22042, USA.
J Clin Exp Dent. 2022 Oct 1;14(10):e815-e821. doi: 10.4317/jced.59825. eCollection 2022 Oct.
This study investigated the properties (depth of cure, surface hardness, and volumetric shrinkage) of two composite restorative materials when polymerized with a novel "quad" spectrum (PinkWave) light-curing unit (LCU) compared to a tri-spectrum LCU (Valo Grand).
One Valo Grand LCU was modified to be similar in irradiance to the PinkWave, and a second Valo Grand was utilized at the manufacturer's standard irradiant settings. Depth of cure was evaluated using the scraping technique (ISO 4049). Top and bottom surface hardness and bottom/maximum hardness ratios were determined using a hardness tester. Volumetric shrinkage was determined using a video-imaging device. Additionally, the surface temperature of the light tips of the LCUs was measured using a K-type thermocouple.
No significant difference in depth of cure was found with either composite between the PinkWave LCU and the modified Valo Grand LCU at similar irradiance. The unadjusted Valo Grand LCU had slightly less depth of cure. There was no difference in top or bottom surface hardness, bottom/maximum hardness ratios, or volumetric shrinkage between any of the LCU curing modes per composite type. The PinkWave LCU had a significantly greater increase in heat at the tip compared to the modified Valo Grand LCU at similar irradiance and the unadjusted Valo Grand LCU.
The new quad-spectrum LCU, PinkWave, had a significant increase in surface temperature without any improvement in the composite properties tested compared to the tri-spectrum LCU, Valo Grand, at similar irradiance. Light-curing unit, emission spectrum, composite resin, mechanical and physical properties.
本研究调查了两种复合修复材料在与新型“四光谱”（PinkWave）光固化单元（LCU）聚合时的性能（固化深度、表面硬度和体积收缩率），并与三光谱LCU（Valo Grand）进行了比较。
将一台Valo Grand LCU进行改装，使其辐照度与PinkWave相似，另一台Valo Grand则按照制造商的标准辐照设置使用。采用刮擦技术（ISO 4049）评估固化深度。使用硬度测试仪测定顶面和底面硬度以及底面/最大硬度比。使用视频成像设备测定体积收缩率。此外，使用K型热电偶测量LCU光尖端的表面温度。
在相似辐照度下，PinkWave LCU与改装后的Valo Grand LCU对两种复合材料的固化深度均无显著差异。未调整的Valo Grand LCU固化深度略浅。每种复合材料类型在任何LCU固化模式下的顶面或底面硬度、底面/最大硬度比或体积收缩率均无差异。在相似辐照度下，与改装后的Valo Grand LCU和未调整的Valo Grand LCU相比，PinkWave LCU尖端的热量显著增加。
在相似辐照度下，新型四光谱LCU PinkWave与三光谱LCU Valo Grand相比，表面温度显著升高，但所测试的复合材料性能并未得到改善。光固化单元、发射光谱、复合树脂、机械和物理性能。
