Dr. Toopchi is an assistant professor, Pediatric Division, University of Detroit Mercy School of Dentistry, Detroit, Mich., USA.
Dr. Bakhurji is an assistant professor, Preventive Dental Sciences Department, College of Dentistry, Imam Abdulrahman Bin Faisal University, Dammam, Saudi Arabia;, Email:
Pediatr Dent. 2021 Jan 15;43(1):44-49.
To determine the effect of a dental curing light on the penetration depth of silver diamine fluoride (SDF), dentin hardness, and silver and fluoride ion precipitation into cavitated carious lesions. SDF was applied on 16 primary incisors extracted due to caries extending into dentin. Teeth were divided into two groups: (1) control group, was not light-cured; and (2) test group, was light-cured. A scanning electron microscope, and OmniMet software were used to measure penetration depth, dentin hardness, and ion precipitation. Wilcoxon's ranksum test was used for statistical analysis. All samples in both groups showed SDF penetration beyond the carious lesion and into sound dentin. The penetration depth into sound dentin was 70 μm further without the dental curing light it (P<0.001). Silver precipitation in infected dentin with the dental curing light was approximately 2.6 times greater than without it (P=0.02). Dentin hardness of infected dentin was 26 percent more with the dental curing light (P=0.04). Applying a dental curing light during silver diamine fluoride treatment of carious lesions induces more silver ion precipitation in infected dentin, increases its hardness, and, perhaps because more silver stays in the infected dentin, less SDF penetrates into sound dentin.
为了确定牙科固化灯对银胺氟化物（SDF）渗透深度、牙本质硬度以及银和氟离子沉淀到龋齿病变中的影响。将 SDF 应用于 16 颗因龋齿延伸到牙本质而被拔出的乳牙。牙齿分为两组：（1）对照组，不进行光固化；（2）实验组，进行光固化。使用扫描电子显微镜和 OmniMet 软件测量渗透深度、牙本质硬度和离子沉淀。采用 Wilcoxon 秩和检验进行统计分析。两组所有样本均显示 SDF 渗透超过龋齿病变并进入健康牙本质。没有牙科固化灯时，SDF 在健康牙本质中的渗透深度增加了 70μm（P<0.001）。在感染牙本质中，有牙科固化灯时的银沉淀量大约是没有时的 2.6 倍（P=0.02）。有牙科固化灯时，感染牙本质的硬度增加了 26%（P=0.04）。在银胺氟化物治疗龋齿病变时使用牙科固化灯可使更多的银离子沉淀到感染的牙本质中，增加其硬度，并且由于更多的银留在感染的牙本质中，SDF 渗透到健康牙本质的量减少。
