Sowkarthicaa Palanisamy, Mathian Veerabadhran M, Gawthaman Murugesan, Vinodh Selvaraj, Manoharan Muthusamy, Kamatchi Mohanraj
Department of Pedodontics and Preventive Dentistry, Vivekanandha Dental College for Women, Namakkal, Tamil Nadu, India.
Int J Clin Pediatr Dent. 2023 Aug;16(Suppl 1):S77-S80. doi: 10.5005/jp-journals-10005-2608.
The study aimed to assess and compare the crazing of preformed stainless steel (SS) crowns at various autoclave cycles.
Around 15 SS crowns were subjected to zero (unsterilized), one, three, five, and seven autoclave cycles at 121°C, 15 psi for 20 minutes. After each autoclave cycle, the mesial surface of each crown from occlusal to cervical portions was examined under a 40× stereomicroscope. Crazing was evaluated using Wickersham's criteria.
One autoclave cycle does not produce any cracks, whereas the higher the number of autoclave cycles, the higher the cracks, which affects the prognosis of the SS crown treatment.
Surface alterations of SS crowns after different autoclave cycles were significant. So, preformed SS crowns should be discarded after sterilizing once or twice during clinical practice.
Sowkarthicaa P, Mathian VM, Gawthaman M, Comparative Evaluation of Preformed Stainless Steel Crown's Crazing at Different Autoclave Cycles. Int J Clin Pediatr Dent 2023;16(S-1):S77-S80.
本研究旨在评估和比较预成不锈钢（SS）冠在不同压力蒸汽灭菌周期下的裂纹情况。
约15个SS冠分别在121°C、15磅力/平方英寸的条件下进行零次（未灭菌）、1次、3次、5次和7次压力蒸汽灭菌，每次20分钟。每次压力蒸汽灭菌周期后，在40倍体视显微镜下检查每个冠从咬合面到颈部的近中表面。使用威克瑟姆标准评估裂纹情况。
1次压力蒸汽灭菌周期未产生任何裂纹，而压力蒸汽灭菌周期次数越多，裂纹越多，这会影响SS冠治疗的预后。
不同压力蒸汽灭菌周期后SS冠的表面改变显著。因此，在临床实践中，预成SS冠在灭菌一两次后就应丢弃。
Sowkarthicaa P, Mathian VM, Gawthaman M, 不同压力蒸汽灭菌周期下预成不锈钢冠裂纹的比较评估。《国际临床儿科学牙科杂志》2023年；16（S-1）：S77 - S80。
