Department of Prosthodontics, Faculty of Dentistry, Recep Tayyip Erdogan University, Islampasa, Menderes Blvd. No:612 Rize, Rize, 53020, Turkey.
Clin Oral Investig. 2024 Nov 6;28(11):629. doi: 10.1007/s00784-024-06016-3.
To investigate the effects of denture cleansers on the various properties of CAD/CAM and heat-polymerized polymethyl methacrylate (PMMA).
Two different brands of heat-polymerized and two of milled PMMA were fabricated (n = 50), in total 200. Each group was randomly divided into five subgroups (n = 10): control groups (D1) kept in distilled water, cleaning tablets (D2, D3), neutral (D4) and acidic electrolyzed acid water (EAW) (D5). Surface roughness, hardness and flexural strength values were evaluated. Data were statistically analyzed with two-way ANOVA and Tukey post hoc test for comparison (p<0.05).
The milled group showed significantly lower surface roughness, greater surface hardness, and higher flexural strength values than heat polymerized denture bases (p<0.05). The denture cleansers had no significant effect on the surface roughness values of the milled specimens (p>0.05), whereas the specimens in the heat-polymerized groups and treated with D5 showed greater surface roughness values compared with the other cleaning agents (p > 0.05). The denture cleansers had no significant effect on surface hardness and flexural strength of heat polymerize groups (p > 0.05). However, D2, D3 and D5 cleaning agent decreased the hardness values of the milled group (p<0.05) and D5 cleaning agent decreased the flexural strength of the milled group (p<0.05).
It was observed that the applied denture cleansers affected the surface roughness, surface hardness, and flexural strength values of both denture bases but within a clinically acceptable value.
CAD/CAM denture bases showed significantly higher physical and mechanical properties than to heat-polymerized base materials. Although the applied neutral EAW cleaners give desired results for denture bases, clinical studies are needed for biological compatibility.
研究义齿清洁剂对 CAD/CAM 和热聚合聚甲基丙烯酸甲酯（PMMA）各种性能的影响。
制作了两种不同品牌的热聚合和两种铣削 PMMA（n = 50，共 200 个）。每组随机分为五组（n = 10）：对照组（D1）保存在蒸馏水中，清洁片（D2、D3），中性（D4）和酸性电解酸水（EAW）（D5）。评估表面粗糙度、硬度和弯曲强度值。使用双向方差分析和 Tukey 事后检验进行数据统计分析比较（p<0.05）。
铣削组的表面粗糙度显著低于热聚合义齿基托，表面硬度更大，弯曲强度值更高（p<0.05）。义齿清洁剂对铣削试件的表面粗糙度值没有显著影响（p>0.05），而热聚合组和用 D5 处理的试件的表面粗糙度值与其他清洁剂相比更大（p>0.05）。义齿清洁剂对热聚合组的表面硬度和弯曲强度没有显著影响（p>0.05）。然而，D2、D3 和 D5 清洁剂降低了铣削组的硬度值（p<0.05），D5 清洁剂降低了铣削组的弯曲强度（p<0.05）。
结果表明，所应用的义齿清洁剂会影响两种义齿基托的表面粗糙度、表面硬度和弯曲强度值，但在临床可接受的范围内。
CAD/CAM 义齿基托表现出明显高于热聚合基底材料的物理和机械性能。尽管应用的中性 EAW 清洁剂可为义齿基托提供理想的效果，但仍需要进行生物相容性的临床研究。
