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TiO2 nanotubes improve physico-mechanical properties of glass ionomer cement.
Dental Materials ( IF 5 ) Pub Date : 2020-02-01 , DOI: 10.1016/j.dental.2020.01.018
Kamila Rosamilia Kantovitz 1 , Fernando Pelegrim Fernandes 2 , Isabella Vidal Feitosa 2 , Marcela Oliveira Lazzarini 3 , Giovanna Corrêa Denucci 2 , Orisson Ponce Gomes 4 , Priscila Alves Giovani 3 , Kelly Maria Silva Moreira 3 , Vanessa Gallego Arias Pecorari 5 , Ana Flávia Sanches Borges 6 , Francisco Humberto Nociti 7 , Roberta Tarkany Basting 2 , Paulo Noronha Lisboa-Filho 4 , Regina Maria Puppin-Rontani 3
Affiliation  

OBJECTIVES The aim of this study was to determine the physico-mechanical properties of a high viscosity glass ionomer cement (GIC) reinforced with TiO2 nanotubes (TiO2-nt). METHODS TiO2-nt was incorporated into the GIC powder components (Ketac Molar EasyMix™) in concentrations of 0% (control group), 3%, 5%, 7% by weight. Compressive strength (n = 10/group), three point bending for flexural strength (n = 18/group), microshear bond strength to dentin and failure mode (n = 20/group), and surface roughness and weight loss before and after brushing simulation (30,000 cycles) (n = 8/group) were evaluated. Data were submitted to Shapiro-Wilk, ANOVA, Tukey and Chi-square tests (α ≤ 0.05). RESULTS Addition of 5% of TiO2-nt into GIC presented the highest values for compressive strength and differed from the control, 3% and 7% groups (p = 0.023). There were no significant differences in flexural strength (p = 0.107) and surface roughness before and after the dental brushing (p = 0.287) among the groups. GIC added with 5% TiO2-nt showed the lowest weight loss values (p = 0.01), whereas the control, 3% or 5% TiO2-nt groups presented similar microshear bond strength values (p ≥ 0.05). The 5% TiO2-nt group featured higher microshear bond strength than the 7% TiO2-nt group (p = 0.034). Cohesive in material was the most representative failure mode for all groups. SIGNIFICANCE The incorporation of TiO2-nt did not affect GIC's adhesiveness to dentin, but improved its compressive strength at 5%. Furthermore, TiO2-nt decreased the percentage of weight loss after GIC's surface wear.

中文翻译:

TiO2纳米管改善了玻璃离聚物水泥的物理机械性能。

目的本研究的目的是确定用TiO2纳米管(TiO2-nt)增强的高粘度玻璃离聚物水泥(GIC)的物理机械性能。方法将TiO2-nt以0%(对照组),3%,5%,7%(重量)的浓度掺入GIC粉末组分(Ketac Molar EasyMix™)中。抗压强度(n = 10 /组),抗弯强度的三点弯曲(n = 18 /组),与牙本质和破坏模式的微剪切粘结强度(n = 20 /组),刷牙前后的表面粗糙度和重量损失模拟(30,000个循环)(n = 8 /组)进行了评估。数据已提交给Shapiro-Wilk,ANOVA,Tukey和卡方检验(α≤0.05)。结果在GIC中添加5%的TiO2-nt表现出最高的抗压强度值,与对照组,3%和7%组不同(p = 0.023)。各组之间在刷牙前后的抗弯强度(p = 0.107)和表面粗糙度没有显着差异(p = 0.287)。加入5%TiO2-nt的GIC显示出最低的失重值(p = 0.01),而对照组中3%或5%的TiO2-nt组显示出相似的微剪切粘结强度值(p≥0.05)。5%TiO2-nt组的微剪切粘结强度高于7%TiO2-nt组(p = 0.034)。在所有组中,材料内聚是最具代表性的失效模式。重要性TiO2-nt的掺入并不会影响GIC对牙本质的粘附性,但会提高其5%的抗压强度。此外,TiO2-nt降低了GIC表面磨损后重量损失的百分比。各组之间在刷牙之前和之后的表面粗糙度(p = 0.287)和107)。加入5%TiO2-nt的GIC显示出最低的失重值(p = 0.01),而对照组中3%或5%的TiO2-nt组显示出相似的微剪切粘结强度值(p≥0.05)。5%TiO2-nt组的微剪切粘结强度高于7%TiO2-nt组(p = 0.034)。在所有组中,材料内聚是最具代表性的失效模式。重要性TiO2-nt的掺入并不会影响GIC对牙本质的粘附性,但会提高其5%的抗压强度。此外,TiO2-nt降低了GIC表面磨损后重量损失的百分比。各组之间在刷牙之前和之后的表面粗糙度(p = 0.287)和107)。加入5%TiO2-nt的GIC显示出最低的失重值(p = 0.01),而对照组中3%或5%的TiO2-nt组显示出相似的微剪切粘结强度值(p≥0.05)。5%TiO2-nt组的微剪切粘结强度高于7%TiO2-nt组(p = 0.034)。在所有组中,材料内聚是最具代表性的失效模式。重要性TiO2-nt的加入并没有影响GIC对牙本质的粘附性,但提高了其5%的抗压强度。此外,TiO2-nt降低了GIC表面磨损后重量损失的百分比。3%或5%的TiO2-nt基团具有相似的微剪切粘结强度值(p≥0.05)。5%TiO2-nt组的微剪切粘结强度高于7%TiO2-nt组(p = 0.034)。在所有组中,材料内聚是最具代表性的失效模式。重要性TiO2-nt的加入并没有影响GIC对牙本质的粘附性,但提高了其5%的抗压强度。此外,TiO2-nt降低了GIC表面磨损后重量损失的百分比。3%或5%的TiO2-nt基团具有相似的微剪切粘结强度值(p≥0.05)。5%TiO2-nt组的微剪切粘结强度高于7%TiO2-nt组(p = 0.034)。在所有组中,材料内聚是最具代表性的失效模式。重要性TiO2-nt的加入并没有影响GIC对牙本质的粘附性,但提高了其5%的抗压强度。此外,TiO2-nt降低了GIC表面磨损后重量损失的百分比。
更新日期:2020-02-03
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