Sahoo Subhashree, Palanimuthu Senthil Kumar, Rajendran Ganesh, T Subbalekshmi, Haridoss SelvaKumar, Swaminathan Kavitha
Pediatric and Preventive Dentistry, Sri Aurobindo College of Dentistry, Sri Aurobindo University, Indore, IND.
Pedodontics and Preventive Dentistry, Primary Health Care Corporation, Doha, QAT.
Cureus. 2025 Apr 21;17(4):e82694. doi: 10.7759/cureus.82694. eCollection 2025 Apr.
Background Prefabricated zirconia crowns are increasingly used in pediatric dentistry due to their aesthetic and mechanical advantages. The selection of luting cement significantly influences stress distribution at the crown-tooth interface, potentially affecting long-term clinical performance. Objective To evaluate and compare the stress distribution in prefabricated zirconia crowns luted with four different cements zinc phosphate cement (ZPC), zinc polycarboxylate cement (PC), glass ionomer cement (GIC), and resin cement (RC) using finite element analysis (FEA). Methods A three-dimensional finite element model of a primary mandibular second molar restored with a prefabricated zirconia crown was developed. The model was analyzed under vertical, oblique, and lateral masticatory loads using four types of luting cements. Stress distribution was assessed using von Mises stress criteria across the tooth, crown, and cement layers. Results ZPC exhibited the highest von Mises stress values across all loading conditions, especially in the cement and dentin layers.PC demonstrated the lowest stress values, indicating reduced mechanical strain on the underlying structures. Conclusion The choice of luting cement plays a critical role in stress distribution beneath zirconia crowns. Zinc polycarboxylate cement showed the most favorable biomechanical behavior in this finite element model under simulated masticatory forces. However, clinical studies are needed to validate these findings and assess long-term outcomes.
由于具有美学和机械优势，预制氧化锆冠在儿童牙科中的应用越来越广泛。粘结水门汀的选择会显著影响冠-牙界面处的应力分布，可能会影响长期临床性能。目的：使用有限元分析（FEA）评估和比较用四种不同水门汀（磷酸锌水门汀（ZPC）、聚羧酸锌水门汀（PC）、玻璃离子水门汀（GIC）和树脂水门汀（RC））粘结的预制氧化锆冠中的应力分布。方法：建立一个用预制氧化锆冠修复的下颌第一乳磨牙的三维有限元模型。使用四种粘结水门汀在垂直、斜向和侧向咀嚼载荷下对模型进行分析。使用冯·米塞斯应力准则评估牙齿、牙冠和水门汀层的应力分布。结果：在所有加载条件下，ZPC的冯·米塞斯应力值最高，尤其是在水门汀和牙本质层。PC的应力值最低，表明其对下方结构的机械应变较小。结论：粘结水门汀的选择对氧化锆冠下方的应力分布起着关键作用。在该有限元模型中，在模拟咀嚼力作用下，聚羧酸锌水门汀表现出最有利的生物力学行为。然而，需要进行临床研究来验证这些发现并评估长期结果。
