Gehlot Paras Mull, Sudeep Parvathi, Manjunath Vinutha, Annapoorna B M, Prasada L Krishna, Nandlal Bhojraj
Department of Conservative Dentistry and Endodontics, JSS Dental College and Hospital, JSS Academy of Higher Education and Research, SS Nagara, Mysuru, Karnataka, India.
Department of Conservative Dentistry and Endodontics, KVG Dental College and Hospital, Dakshina Kannada, Karnataka, India.
Eur J Dent. 2022 Oct;16(4):820-827. doi: 10.1055/s-0041-1739547. Epub 2022 Feb 17.
Bulk-filled composite resins are popularly used for posterior restorations due to various advantages. Routine oral hygiene measures like toothbrushing and the use of various mouthrinses can influence the mechanical properties of composite resins. Desensitizing mouthrinses are widely used as well, to manage dentinal hypersensitivity. Studies on the influence of desensitizing mouthrinses on bulk-filled composites are limited. Hence, the objective of the present study was to evaluate the influence of toothbrushing and various desensitizing mouthrinses on the surface roughness and microhardness of Tetric N-Ceram bulk-fill composite resin.
Fifty Tetric N-Ceram bulk-fill composite resin disks were prepared and were randomly divided into five groups ( = 10). Group 1 (Control): no toothbrushing and no mouthrinse; Group 2: toothbrushing only; Group 3: toothbrushing + HiOra-K mouthrinse; Group 4: toothbrushing + Listerine Sensitive mouthrinse; and Group 5: toothbrushing + Shy-OR mouthrinse. The specimens were brushed with a soft bristle brush using a toothpaste slurry and immersed in respective mouthrinse twice daily for 1 month. The mean surface roughness (average roughness) and microhardness (Vickers Pyramid number) values were determined and the data were tabulated. Data were analyzed using one-way analysis of variance, Post-hoc Tukey test, and Pearson correlation test. A -value less than 0.05 was considered statistically significant.
Specimens treated with HiOra-K mouthrinse exhibited maximum surface roughness ( < 0.05) and specimens treated with Listerine Sensitive exhibited the least microhardness ( < 0.05). A weak negative correlation was found between surface roughness and microhardness for groups 1, 2, and 5, while a weak positive correlation was found for groups 3 and 4.
It is suggested that desensitizing mouthrinses containing alcohol or essential oils can lead to increased surface roughness and reduction in microhardness of bulk-fill composites, which could have an undesirable effect on their clinical performance.
由于具有多种优点，大容量充填复合树脂广泛用于后牙修复。常规口腔卫生措施，如刷牙和使用各种漱口水，会影响复合树脂的机械性能。脱敏漱口水也被广泛用于治疗牙本质过敏。关于脱敏漱口水对大容量充填复合树脂影响的研究有限。因此，本研究的目的是评估刷牙和各种脱敏漱口水对Tetric N-Ceram大容量充填复合树脂表面粗糙度和显微硬度的影响。
制备50个Tetric N-Ceram大容量充填复合树脂圆盘，并随机分为五组（每组 = 10）。第1组（对照组）：不刷牙且不使用漱口水；第2组：仅刷牙；第3组：刷牙 + HiOra-K漱口水；第4组：刷牙 + 利斯特林敏感漱口水；第5组：刷牙 + Shy-OR漱口水。使用牙膏糊剂用软毛牙刷刷洗标本，并每天两次浸入相应的漱口水1个月。测定平均表面粗糙度（平均粗糙度）和显微硬度（维氏硬度值）值，并将数据制成表格。使用单因素方差分析、事后Tukey检验和Pearson相关检验分析数据。P值小于0.05被认为具有统计学意义。
用HiOra-K漱口水处理的标本表现出最大的表面粗糙度（P < 0.05），用利斯特林敏感漱口水处理的标本表现出最小的显微硬度（P < 0.05）。第1、2和5组的表面粗糙度和显微硬度之间发现弱负相关，而第3和4组发现弱正相关。
建议含酒精或精油的脱敏漱口水会导致大容量充填复合树脂的表面粗糙度增加和显微硬度降低，这可能对其临床性能产生不良影响。
