Mendoza Lilibeth Carola Leyton, Peres Thiago Silva, Estevão Isaac Daniel Gonzaga, Ribeiro Maria Tereza Hordones, de Melo Calebe, Carlos Hugo Lemes, Soares Carlos José
PhD student, Department of Operative Dentistry and Dental Materials, School of Dentistry, Federal University of Uberlândia (UFU), Uberlândia, MG, Brazil.
Predoctoral student, Department of Operative Dentistry and Dental Materials, School of Dentistry, Federal University of Uberlândia (UFU), Uberlândia, MG, Brazil.
J Prosthet Dent. 2024 Dec;132(6):1326.e1-1326.e9. doi: 10.1016/j.prosdent.2024.08.007. Epub 2024 Sep 2.
How resin-based material and a light-activation protocol influence the mechanical properties of materials used to cement glass fiber post-and-cores in endodontically treated teeth is unclear.
The purpose of this in vitro study was to evaluate the influence of immediate or 5-minute delayed light activation on the mechanical properties of dual-polymerizing resin cements and dual-polymerizing resin-core materials compared with bulk-fill composite resins.
Nine resin-based materials were tested: 4 dual-polymerizing resin-core materials, (Allcem Core; FGM, LuxaCore Z; DMG, Rebilda DC; VOCO, and (Clearfil DC Core Plus; KURARAY), 3 dual-polymerizing resin cements, (RelyX Universal; 3M ESPE, RelyX U200; 3M ESPE, and Allcem Dual; FGM), and 2 bulk-fill composite resins, (Opus Bulk Fill APS; FGM, and Filtek One Bulk Fill; 3M ESPE). The dual-polymerizing materials were light activated using both protocols. The postgel shrinkage (Shr), flexural strength (FS), elastic modulus (E), Knoop hardness (KH), degree of conversion (DC), and depth of polymerization (DoP) were measured (n=10). The data for Shr, FS, E, and DoP were analyzed using 2-way ANOVA, and for KH and DC using 2-way repeated measurement ANOVA and the Tukey HSD test (α=.05).
A 5-minute delay before light-activation significantly reduced Shr for all materials (P<.001). Increasing the depth significantly reduced the KH for all materials (P<.001). Bulk-fill composite resins and dual-polymerizing resin-core had higher KH values than dual-polymerizing resin cements (P<.001).
Delayed 5-minute light-activation reduced postgel shrinkage and had no negative effect on mechanical properties. Dual-polymerizing resin-core materials exhibited higher KH values than dual-polymerizing resin cement and mechanical properties similar to those of bulk-fill composite resin.
基于树脂的材料和光激活方案如何影响用于粘结根管治疗牙齿中玻璃纤维桩核的材料的机械性能尚不清楚。
本体外研究的目的是评估与大块充填复合树脂相比，即刻或延迟5分钟光激活对双固化树脂水门汀和双固化树脂核材料机械性能的影响。
测试了9种基于树脂的材料：4种双固化树脂核材料（Allcem Core；FGM、LuxaCore Z；DMG、Rebilda DC；VOCO和Clearfil DC Core Plus；可乐丽）、3种双固化树脂水门汀（RelyX Universal；3M ESPE、RelyX U200；3M ESPE和Allcem Dual；FGM）以及2种大块充填复合树脂（Opus Bulk Fill APS；FGM和Filtek One Bulk Fill；3M ESPE）。使用两种方案对双固化材料进行光激活。测量了凝胶后收缩率（Shr）、挠曲强度（FS）、弹性模量（E）、努氏硬度（KH）、转化率（DC）和聚合深度（DoP）（n = 10）。使用双向方差分析对Shr、FS、E和DoP的数据进行分析，使用双向重复测量方差分析和Tukey HSD检验对KH和DC的数据进行分析（α = 0.05）。
光激活前延迟5分钟显著降低了所有材料的Shr（P < 0.001）。深度增加显著降低了所有材料的KH（P < 0.001）。大块充填复合树脂和双固化树脂核的KH值高于双固化树脂水门汀（P < 0.001）。
延迟5分钟光激活可降低凝胶后收缩率，且对机械性能无负面影响。双固化树脂核材料的KH值高于双固化树脂水门汀，其机械性能与大块充填复合树脂相似。
