Pehlivan Nazile, Öztaş Kırmızı Nurhan, Alim Menekşe
Şehit Mehmet Kılınç Oral and Dental Health Hospital, Yeşilyurt, Malatya 44900, Turkey.
Department of Pediatric Dentistry, Faculty of Dentistry, Gazi University, Çankaya, Ankara 06690, Turkey.
Biomimetics (Basel). 2025 Aug 16;10(8):538. doi: 10.3390/biomimetics10080538.
Biomimetic restorative treatments in pediatric dentistry increase the longevity of the restoration compared to traditional methods and aim to preserve the natural tooth structure. Prefabricated zirconia crowns have been developed as aesthetic alternatives to stainless steel crowns for full-coronal restorations of primary teeth. This study aimed to compare the fracture resistance and microleakage of two different posterior zirconia crown brands-NuSmile (USA) and ProfZrCrown (Turkey)-cemented with either conventional glass ionomer cement (GIC) or resin-modified glass ionomer cement (RMGIC). Eighty extracted primary molars were divided into four groups (n = 20). Crowns were cemented with Ketac™ Cem Radiopaque (GIC) or Ketac™ Cem Plus (RMGIC), in accordance with the manufacturers' instructions, and then subjected to thermocycling. Fracture resistance was tested on 40 samples by applying an increasing compressive load until failure, with values recorded in Newtons (N). The remaining 40 samples were immersed in basic fuchsin dye for microleakage testing and evaluated under a stereomicroscope at 30× magnification. The results revealed that the ProfZrCrown/RMGIC group exhibited significantly higher fracture resistance compared to the NuSmile/RMGIC group ( < 0.05). No statistically significant differences were found among the other groups. Although no significant differences in microleakage were observed among the groups ( > 0.05), crowns cemented with GIC demonstrated higher microleakage levels. Within the limitations of this in vitro study, ProfZrCrown may be considered a promising alternative for aesthetic posterior restorations in pediatric dentistry.
与传统方法相比，儿童牙科中的仿生修复治疗可提高修复体的使用寿命，并旨在保留天然牙体结构。预制氧化锆冠已被开发出来，作为乳牙全冠修复中不锈钢冠的美学替代方案。本研究旨在比较两种不同品牌的后牙氧化锆冠——NuSmile（美国）和ProfZrCrown（土耳其）——分别用传统玻璃离子水门汀（GIC）或树脂改性玻璃离子水门汀（RMGIC）粘结后的抗折强度和微渗漏情况。80颗拔除的乳磨牙被分为四组（n = 20）。根据制造商的说明，用Ketac™ Cem Radiopaque（GIC）或Ketac™ Cem Plus（RMGIC）粘结牙冠，然后进行热循环处理。对40个样本施加逐渐增加的压缩载荷直至破坏，以测试其抗折强度，数值以牛顿（N）记录。其余40个样本浸泡在碱性品红染料中进行微渗漏测试，并在30倍放大率的体视显微镜下进行评估。结果显示，与NuSmile/RMGIC组相比，ProfZrCrown/RMGIC组的抗折强度显著更高（< 0.05）。其他组之间未发现统计学上的显著差异。尽管各组之间在微渗漏方面未观察到显著差异（> 0.05），但用GIC粘结的牙冠微渗漏水平更高。在本体外研究的局限性范围内，ProfZrCrown可被认为是儿童牙科中美学后牙修复的一个有前景的替代方案。
