Shruthi Devi R, Syam Shilpa, Ramesh R
Department of Pediatric Dentistry, Saveetha Dental College and Hospital, Saveetha Institute of Medical and Technical Sciences, SIMATS University, Chennai, Tamil Nadu, India.
Department of Oral Medicine and Radiology, Saveetha Dental College and Hospital, SIMATS University, Chennai, Tamil Nadu, India.
Int J Clin Pediatr Dent. 2025 Apr;18(4):375-382. doi: 10.5005/jp-journals-10005-3097. Epub 2025 May 19.
Stainless steel crowns (SSCs) are commonly utilized in pediatric dentistry for restoring primary teeth affected by extensive decay or trauma, valued for their durability and cost-effectiveness. However, their performance may degrade over time due to wear, marginal discrepancies, and environmental factors, potentially leading to secondary caries and compromised retention. This study investigates the compressive strength, volumetric changes, morphological characteristics, and marginal integrity of SSCs extracted after 1 year and >3 years using nano-computed tomography (Nano-CT).
To evaluate and compare the compressive strength, volumetric changes, morphological characteristics, and marginal integrity of SSCs extracted after 1 year and >3 years.
The study included 50 SSCs divided into two groups: group I (crowns extracted within 1 year) and group II (crowns extracted after >3 years). High-resolution, three-dimensional (3D) nano-CT imaging was used to analyze volumetric and morphological changes, while compressive strength was assessed using a universal testing machine (UTM). Statistical comparisons, including paired -tests, were performed between the groups.
SSCs extracted after 3 years showed significant morphological changes, including increased surface roughness and larger marginal gaps, compared to those extracted within 1 year. These changes were linked to extended exposure to occlusal forces and environmental conditions. Crowns extracted within 1 year demonstrated better compressive strength and marginal fit, highlighting their superior short-term performance. Nano-CT imaging revealed notable differences in surface-to-volume ratios, polar moment of inertia, and other morphological parameters between the two groups.
This study indicates that SSCs experience notable morphological and volumetric changes over time, which can affect their clinical performance and durability. Regular monitoring and maintenance of SSCs are crucial for ensuring their long-term success in pediatric patients. Furthermore, the application of advanced imaging techniques like nano-CT provides valuable insights into the integrity and longevity of dental restorations, helping to refine clinical practices and improve outcomes in pediatric dentistry.
Shruthi DR, Syam S, Ramesh R. Evaluating the Aging of Stainless Steel Crowns: Volumetric and Morphological Insights from Nano-computed Tomography Imaging. Int J Clin Pediatr Dent 2025;18(4):375-382.
不锈钢冠（SSCs）在儿童牙科中常用于修复受广泛龋坏或外伤影响的乳牙，因其耐用性和成本效益而受到重视。然而，由于磨损、边缘差异和环境因素，其性能可能会随时间下降，可能导致继发龋和固位力受损。本研究使用纳米计算机断层扫描（Nano-CT）研究1年后和3年以上拔除的SSCs的抗压强度、体积变化、形态特征和边缘完整性。
评估和比较1年后和3年以上拔除的SSCs的抗压强度、体积变化、形态特征和边缘完整性。
本研究纳入50个SSCs，分为两组：第一组（1年内拔除的牙冠）和第二组（3年以上拔除的牙冠）。使用高分辨率三维（3D）纳米CT成像分析体积和形态变化，同时使用万能试验机（UTM）评估抗压强度。在两组之间进行统计比较，包括配对检验。
与1年内拔除的SSCs相比，3年后拔除的SSCs表现出显著的形态变化，包括表面粗糙度增加和边缘间隙增大。这些变化与长期受到咬合力和环境条件的影响有关。1年内拔除的牙冠表现出更好的抗压强度和边缘适合性，突出了它们优越的短期性能。纳米CT成像显示两组之间在表面积与体积比、极惯性矩和其他形态参数方面存在显著差异。
本研究表明，SSCs随时间会经历显著的形态和体积变化，这会影响其临床性能和耐用性。对SSCs进行定期监测和维护对于确保其在儿童患者中的长期成功至关重要。此外，纳米CT等先进成像技术的应用为牙修复体的完整性和寿命提供了有价值的见解，有助于改进临床实践并改善儿童牙科的治疗效果。
Shruthi DR, Syam S, Ramesh R. Evaluating the Aging of Stainless Steel Crowns: Volumetric and Morphological Insights from Nano-computed Tomography Imaging. Int J Clin Pediatr Dent 2025;18(4):375-382.
