Khudhair Aya Tahseen, Khalaf Muna Saleem
Pedodontic Dentistry Department, College of Dentistry, University of Baghdad, Baghdad, Iraq.
Pedodontic & Preventive Dentistry Department, College of Dentistry, University of Baghdad, Baghdad, Iraq.
J Int Soc Prev Community Dent. 2024 Jun 27;14(3):225-232. doi: 10.4103/jispcd.jispcd_195_23. eCollection 2024 May-Jun.
Resin-modified glass ionomer cement tends to shrink due to polymerization of the resin component. Additionally, they are more prone to syneresis and imbibition during the setting process. This study evaluates the impact of chitosan, a biopolymer that is, both biomaterial and biocompatible, on the strength of dentin bonding and compares it with ACTIVA Bio-ACTIVE Restorative. The present study was aimed to assess the impact of including chitosan into Fuji II on the shear bond strength between. the restoration material and tooth dentin, in contrast to Bioactiva in permanent teeth.
A total of 30 premolar teeth were recently extracted. The study involved three distinct sample groups. Group 1 (10 teeth) is the negative control (Fuji II), Group 2 (10 teeth) is the positive control (ACTIVA Bio-ACTIVE Restorative), and Group 3 (10 teeth) is treated with a mixture of Chitosan and Fuji II (CH-Fuji II). Each tooth's buccal and palatal cusps were eliminated to achieve a horizontal surface. Using a periodontal probe, 1.5 mm from the mesial pit to the mesial marginal ridge were removed. Restoration was implemented in all groups following manufacturer directions. Thermocycling the teeth by immersing them in a water bath with temperatures ranging from 5°C to 55°C (± 1-2°C) for 30 s (500 cycles). Each sample was attached to the universal testing machine's jig at a cross-head speed of 1 mm/min. Shear force was used until breakage, and the bond's adhesive strength was then calculated. Statistical analysis using ANOVA with Dunnett's T3 test. Results were significant at < 0.05.
Statistically significant difference was present between Chitosan and Fuji II and between Chitosan and Activa by reducing the shear bond strength.
Addition of chitosan to Fuji II had a negative effect on the shear bond with a significant difference while Activa and Fuji II exhibited favorable shear bond strength.
树脂改性玻璃离子水门汀往往会因树脂成分的聚合而收缩。此外，它们在凝固过程中更容易出现脱水收缩和吸湿现象。本研究评估了壳聚糖（一种既是生物材料又具有生物相容性的生物聚合物）对牙本质粘结强度的影响，并将其与ACTIVA生物活性修复材料进行比较。本研究旨在评估在富士II型材料中加入壳聚糖对修复材料与牙齿牙本质之间剪切粘结强度的影响，与恒牙中的生物活性材料形成对比。
共收集30颗近期拔除的前磨牙。该研究涉及三个不同的样本组。第1组（10颗牙齿）为阴性对照组（富士II型），第2组（10颗牙齿）为阳性对照组（ACTIVA生物活性修复材料），第3组（10颗牙齿）用壳聚糖与富士II型的混合物（CH-富士II型）处理。去除每颗牙齿的颊尖和腭尖以获得水平表面。使用牙周探针，从近中窝到近中边缘嵴去除1.5毫米。按照制造商说明在所有组中进行修复。将牙齿置于温度范围为5°C至55°C（±1 - 2°C）的水浴中30秒（500个循环）进行热循环。每个样本以1毫米/分钟的十字头速度连接到万能试验机的夹具上。使用剪切力直至断裂，然后计算粘结的粘结强度。采用方差分析和邓尼特T3检验进行统计分析。结果在<0.05时具有显著性。
壳聚糖与富士II型之间以及壳聚糖与Activa之间在降低剪切粘结强度方面存在统计学显著差异。
在富士II型中添加壳聚糖对剪切粘结有负面影响，差异显著，而Activa和富士II型表现出良好的剪切粘结强度。
