Division of Pediatric dentistry, Department of Orthodontics and Pediatric dentistry, Faculty of Dentistry, Chiang Mai University, Chiang Mai, 50200, Thailand.
Department of Prosthodontics, Faculty of Dentistry, Chiang Mai University, Chiang Mai, Thailand.
Sci Rep. 2024 Nov 26;14(1):29295. doi: 10.1038/s41598-024-81088-5.
The durability of pediatric zirconia crowns for primary teeth is influenced by the choice of luting cement, with the effectiveness of the cement being directly correlated to its ability to reduce microleakage. This in vitro study aimed to assess and compare the microleakage of custom-made zirconia crowns (CZCs) and prefabricated zirconia crowns (PZCs) on primary maxillary incisors when luted with self-adhesive resin cement, resin-modified glass ionomer cement (RMGIC), and bioactive cement. Sixty primary maxillary incisors were prepared and allocated into two groups, each corresponding to the two types of crowns. These groups were further divided into three subgroups each to test the different luting cements. Following the cementation process and thermocycling, the specimens were immersed in a 2% methylene blue solution for microleakage evaluation. The analysis involved sectioning the teeth and examining them under a stereomicroscope. Statistical analysis, using two-way ANOVA and post hoc Dunnett T3 tests (p < 0.05), revealed significant differences in microleakage among the cements. The study found that PZCs luted with RMGIC showed the highest level of microleakage, whereas those luted with bioactive cement exhibited the lowest, positioning bioactive cement as the preferable choice for minimizing microleakage. This finding illustrates the critical importance of selecting appropriate luting cements to optimize the clinical outcomes of zirconia crown restorations in pediatric dentistry, focusing on reducing microleakage to ensure the restoration's durability and success.
儿童氧化锆全瓷冠的耐用性受到粘固剂选择的影响，而粘固剂的有效性与其减少微渗漏的能力直接相关。本体外研究旨在评估和比较自粘接树脂水泥、树脂改良玻璃离子水泥（RMGIC）和生物活性水泥粘固时，定制氧化锆全瓷冠（CZCs）和预制氧化锆全瓷冠（PZCs）在上颌恒中切牙上的微渗漏情况。制备 60 颗上颌恒中切牙，分为两组，每组对应两种类型的牙冠。这两组进一步分为三个亚组，每组测试不同的粘固剂。粘固和热循环后，将标本浸入 2%亚甲基蓝溶液中进行微渗漏评估。分析包括将牙齿切片并在立体显微镜下检查。使用双向方差分析和事后 Dunnett T3 检验（p<0.05）进行统计分析，结果显示不同粘固剂之间的微渗漏存在显著差异。研究发现，RMGIC 粘固的 PZCs 显示出最高水平的微渗漏，而生物活性水泥粘固的则显示出最低水平，这表明生物活性水泥是最小化微渗漏的首选选择。这一发现表明，在儿科牙科中，选择合适的粘固剂对于优化氧化锆全瓷冠修复的临床效果至关重要，重点是减少微渗漏，以确保修复的耐用性和成功。
