Karkera Reshma, Raj A P Nirmal, Isaac Lijo, Mustafa Mohammed, Reddy R Naveen, Thomas Mathew
Department of Prosthodontics, A.J. Institute of Dental Sciences Mangaluru, Karnataka, India, e-mail:
Department of Prosthodontics, College of Dental Science and Hospital, Amargadh, Gujarat, India.
J Contemp Dent Pract. 2016 Dec 1;17(12):1016-1021.
This study was planned to find the solubility of the conventional luting cements in comparison with that of the polyacid-modified composite luting cement and recently introduced resin-modified glass ionomer cement (RMGIC) with exposure to water at early stages of mixing.
An in vitro study of the solubility of the following five commercially available luting cements, viz., glass ionomer cement (GIC) (Fuji I, GC), zinc phosphate (Elite 100, GC), polyacid-modified resin cement (PMCR) (Principle, Dentsply), polycarboxylate cement (PC) (Poly - F, Dentsply), RMGIC (Vitremer, 3M), was conducted. For each of these groups of cements, three resin holders were prepared containing two circular cavities of 5 mm diameter and 2 mm depth. All the cements to be studied were mixed in 30 seconds and then placed in the prepared cavities in the resin cement holder for 30 seconds.
From all of the observed luting cements, PMCR cement had shown the lowest mean loss of substance at all immersion times and RMGIC showed the highest mean loss of substanceat all immersion times in water from 2 to 8 minutes. The solubility of cements decreased by 38% for GIC, 33% for ZnPO, 50% for PMCR, 29% for PC, and 17% for RMGIC.
The PMCR cement (Principle-Dentsply) had shown lowest solubility to water at the given time intervals of immersion. This was followed by PC, zinc phosphate, and GIC to various time intervals of immersion.
本研究旨在比较传统粘结水门汀与聚酸改性复合粘结水门汀以及最近推出的树脂改性玻璃离子水门汀（RMGIC）在混合早期接触水时的溶解度。
对以下五种市售粘结水门汀进行体外溶解度研究，即玻璃离子水门汀（GIC）（富士I型，GC公司）、磷酸锌水门汀（Elite 100，GC公司）、聚酸改性树脂水门汀（PMCR）（普理灵，登士柏公司）、聚羧酸锌水门汀（PC）（Poly - F，登士柏公司）、RMGIC（Vitremer，3M公司）。对于每组水门汀，制备三个树脂固定器，每个固定器包含两个直径5mm、深度2mm的圆形腔。所有待研究的水门汀均在30秒内混合，然后置于树脂水门汀固定器中制备好的腔中30秒。
在所有观察到的粘结水门汀中，PMCR水门汀在所有浸泡时间的物质平均损失最低，而RMGIC在2至8分钟的水中浸泡所有时间的物质平均损失最高。GIC的水门汀溶解度降低了38%，ZnPO降低了33%，PMCR降低了50%，PC降低了29%，RMGIC降低了17%。
在给定的浸泡时间间隔内，PMCR水门汀（普理灵 - 登士柏公司）对水的溶解度最低。其次是PC、磷酸锌水门汀和GIC，在不同的浸泡时间间隔下溶解度依次降低。
