Nesser Salma Fuad Al, Bshara Nada George
Department of Pediatric Dentistry, Faculty of Dentistry, Damascus University, Syria.
Dent Med Probl. 2019 Apr-Jun;56(2):149-153. doi: 10.17219/dmp/103911.
Sodium hypochlorite (NaOCl) gel has been suggested as a safer substitute in open apices as compared to solution, with the same antimicrobial effect.
This study aimed to compare the amount of the apical extrusion of NaOCl gel and solution in immature permanent teeth.
A crossover in vitro study was conducted at the Department of Pediatric Dentistry, Faculty of Dentistry of Damascus University, Syria. Thirty freshly extracted immature single-rooted human premolars were decoronated and the cavity was then accessed. The teeth were radiographed to determine the mesiodistal dimension of the apex. In addition, the surface area of the apical foramen was calculated with Adobe Photoshop® to evaluate the amount of extrusion from the whole surface of the apex. The teeth were divided into 2 groups according to the size of the apex: ≤2.5 mm (group A) and >2.5 mm (group B); each group was irrigated with 5 mL of NaOCl solution and 2 different commercial types of NaOCl gel for 60 s, and then the extruded irrigant was measured in a plastic vial.
The data was analyzed using the Kruskal-Wallis analysis. Based on the observed results, a statistically significant difference was noted (p = 0) between NaOCl solution and gel when the apical diameter was ≤2.5 mm, while there was no significant difference between the 2 types of NaOCl gel. No statistically significant difference was observed (p = 0.2) between NaOCl solution and gel when the apical diameter was >2.5 mm.
Sodium hypochlorite gel is safer than solution when irrigating immature teeth with the apical diameter ≤2.5 mm.
与溶液相比，次氯酸钠（NaOCl）凝胶被认为是开放根尖时更安全的替代品，且具有相同的抗菌效果。
本研究旨在比较未成熟恒牙中NaOCl凝胶和溶液的根尖挤出量。
在叙利亚大马士革大学牙科学院儿童牙科进行了一项交叉体外研究。选取30颗新鲜拔除的未成熟单根人前磨牙，去除冠部，然后进入髓腔。对牙齿进行X线摄影以确定根尖的近远中尺寸。此外，使用Adobe Photoshop®计算根尖孔的表面积，以评估从根尖整个表面挤出的量。根据根尖大小将牙齿分为2组：≤2.5 mm（A组）和>2.5 mm（B组）；每组分别用5 mL NaOCl溶液和2种不同商业类型的NaOCl凝胶冲洗60秒，然后在塑料小瓶中测量挤出的冲洗液。
使用Kruskal-Wallis分析对数据进行分析。根据观察结果，当根尖直径≤2.5 mm时，NaOCl溶液和凝胶之间存在统计学显著差异（p = 0），而两种类型的NaOCl凝胶之间无显著差异。当根尖直径>2.5 mm时，NaOCl溶液和凝胶之间未观察到统计学显著差异（p = 0.2）。
当冲洗根尖直径≤2.5 mm的未成熟牙齿时，次氯酸钠凝胶比溶液更安全。
