Kumar Saurabh, Saran Runki
Department of Pediatrics and Preventive Dentistry, Manipal College of Dental Sciences, Manipal Academy of Higher Education, Manipal, Karnataka, India.
Department of Dental Materials, Manipal College of Dental Sciences, Manipal Academy of Higher Education, Manipal, Karnataka, India.
Int J Clin Pediatr Dent. 2024 Dec;17(12):1404-1408. doi: 10.5005/jp-journals-10005-3017.
In children, polymethylmethacrylate (PMMA) is a commonly used material for fabrication of dental prostheses, such as obturators, removable space maintainers, habit-breaking appliances, removable orthodontic appliances, and removable partial and complete dentures. Regular cleaning of such prostheses is vital for maintaining the health of the oral tissues as well as the longevity of the prosthesis. The chemical method of disinfection, using different chemical cleansers, is commonly used for cleaning a dental prosthesis. Some of these disinfecting agents have been reported to alter the physical and mechanical properties of PMMA.
The aim of the study was to analyze the effect of two commonly used disinfecting agents on the surface roughness and surface hardness of two PMMA-based materials processed using different curing cycles.
PMMA samples were made using short and long curing cycles. The surface roughness and hardness of the samples before and after immersion in the two disinfecting agents were recorded. A profilometer was used to measure surface roughness, whereas hardness was measured using the Vickers hardness tester.
Both disinfecting agents increased the surface roughness and decreased the hardness of the PMMA samples. The effect was more profound in samples made using the short curing cycle.
It is important to select the appropriate disinfecting agents and follow the manufacturers' instructions to ensure that the other properties of the prosthesis are not affected.
Kumar S, Saran R. Preserving Integrity: Investigating the Influence of Disinfecting Agents on Polymethylmethacrylate Dental Prosthesis Surface Characteristics in Children. Int J Clin Pediatr Dent 2024;17(12):1404-1408.
在儿童中，聚甲基丙烯酸甲酯（PMMA）是一种常用于制作牙科修复体的材料，如阻塞器、可摘式间隙保持器、破除不良习惯矫治器、可摘式正畸矫治器以及可摘局部义齿和全口义齿。定期清洁此类修复体对于维持口腔组织健康以及修复体的使用寿命至关重要。使用不同化学清洁剂的化学消毒方法常用于清洁牙科修复体。据报道，其中一些消毒剂会改变PMMA的物理和机械性能。
本研究的目的是分析两种常用消毒剂对两种采用不同固化周期加工的PMMA基材料的表面粗糙度和表面硬度的影响。
使用短固化周期和长固化周期制作PMMA样本。记录样本在两种消毒剂中浸泡前后的表面粗糙度和硬度。使用轮廓仪测量表面粗糙度，而硬度则使用维氏硬度测试仪进行测量。
两种消毒剂均增加了PMMA样本的表面粗糙度并降低了其硬度。在使用短固化周期制作的样本中，这种影响更为显著。
选择合适的消毒剂并遵循制造商的说明非常重要，以确保修复体的其他性能不受影响。
Kumar S, Saran R. Preserving Integrity: Investigating the Influence of Disinfecting Agents on Polymethylmethacrylate Dental Prosthesis Surface Characteristics in Children. Int J Clin Pediatr Dent 2024;17(12):1404 - 1408.
