Haddad Mishel, Lugassy Diva, Barhum Mohana, Brosh Tamar, Matalon Shlomo
Department of Oral Rehabilitation, The Maurice and Gabriela Goldschleger School of Dental Medicine, Faculty of Medicine, Tel Aviv University, Tel Aviv 6997801, Israel.
Department of Orthodontics, The Maurice and Gabriela Goldschleger School of Dental Medicine, Faculty of Medicine, Tel Aviv University, Tel Aviv 6997801, Israel.
Dent J (Basel). 2025 Jan 17;13(1):39. doi: 10.3390/dj13010039.
: The success of treatment and prevention for secondary caries hinges significantly on the techniques employed in Class II composite restoration. Additionally, the location of the restored tooth within the oral cavity has emerged as a potential factor determining the quality of the restoration. A comprehensive understanding of these interrelated variables is crucial for advancing the efficacy and durability of dental composite restorations. The aim of this study was to assess how various restoration techniques and the specific location of the tooth restoration in the oral cavity affect marginal sealing, verified by the gap created in the tooth-restoration interface. : Sixty extracted human teeth that had been indicated for orthodontic extraction were collected and embedded into a custom-made holder that was located in one of the four quadrants of a laboratory phantom head. Class II resin composite restorations, using flowable and packable composites, were performed on all teeth using two techniques: Pre-cure and Co-cure. The aging of the restored teeth was conducted using cyclic loading and thermocycling. After aging, the teeth were examined under a scanning electron microscope to measure the gap within the tooth-composite interface. Kolmogorov-Smirnov tests were used to assess the data distribution. Unpaired -tests were employed to compare the mean gaps between the Pre-cure and Co-cure techniques. Additionally, unpaired -tests were utilized to compare the mean gaps between the mesial and distal parts of the teeth. The Kruskal-Wallis test was used to compare the mean gaps among the four quadrants. The statistical significance was set at = 0.05. : No significant difference in the gaps between the Pre-cure and Co-cure techniques was found ( = 0.212). The tooth's location did not generally affect the restoration's gap interface ( = 0.136). : Flowable composites aid in restoring the deep margins of Class II composite restoration. Thus, the potential for further microleakage is similar for both the Pre-cure and Co-cure restoration techniques. The marginal seal of Class II composite restorations is effective when using both Pre-cure and Co-cure techniques, and the restoration site within the oral cavity does not significantly influence the tooth-composite interface seal.
继发龋的治疗和预防成功与否在很大程度上取决于Ⅱ类复合树脂修复所采用的技术。此外，修复牙齿在口腔中的位置已成为决定修复质量的一个潜在因素。全面了解这些相互关联的变量对于提高牙科复合树脂修复的疗效和耐久性至关重要。本研究的目的是评估各种修复技术以及牙齿修复在口腔中的具体位置如何影响边缘封闭，通过牙齿-修复体界面产生的间隙来验证。：收集60颗因正畸需要拔除的离体人牙，并将其嵌入位于实验室模型头四个象限之一的定制固定器中。使用两种技术（预固化和共固化）对所有牙齿进行Ⅱ类树脂复合树脂修复，使用可流动和可压实的复合树脂。对修复后的牙齿进行循环加载和热循环老化处理。老化后，在扫描电子显微镜下检查牙齿以测量牙齿-复合树脂界面内的间隙。使用Kolmogorov-Smirnov检验评估数据分布。采用非配对t检验比较预固化和共固化技术之间的平均间隙。此外，使用非配对t检验比较牙齿近中部分和远中部分之间的平均间隙。使用Kruskal-Wallis检验比较四个象限之间的平均间隙。统计学显著性设定为α = 0.05。：未发现预固化和共固化技术之间的间隙有显著差异（P = 0.212）。牙齿的位置一般不影响修复体的间隙界面（P = 0.136）。：可流动复合树脂有助于修复Ⅱ类复合树脂修复的深部边缘。因此，预固化和共固化修复技术进一步发生微渗漏的可能性相似。使用预固化和共固化技术时，Ⅱ类复合树脂修复的边缘封闭是有效的，并且口腔内的修复部位对牙齿-复合树脂界面封闭没有显著影响。
