Ribeiro Alexandre Antonio, Almeida Layene Figueiredo, Martins Lidia Parsekian, Martins Renato Parsekian
Department of Orthodontics, Universidade Potiguar, Natal, Rio Grande do Norte, Brazil.
Program of Orthodontics, Universidade Estadual Paulista, Araraquara, São Paulo, Brazil.
Am J Orthod Dentofacial Orthop. 2017 Feb;151(2):292-296. doi: 10.1016/j.ajodo.2016.06.040.
Our objective was to assess the amounts of adhesive remnant and enamel damage when removing composite under conventional lighting and ultraviolet (UV) light.
Thirty-eight premolars were divided into 2 groups according to the lighting used for adhesive removal. A multifluted tungsten-carbide bur at low speed was used for this process in both groups. The UV group received conventional lighting associated with UV light, and the conventional group received conventional lighting only. The amounts of adhesive remnant were calculated using images of the teeth taken under UV light with software. Scanning electron microscopy images of epoxy adhesive replicas of the teeth made before bonding and after adhesive removal were graded according to the enamel damage index (EDI), and the difference between the final and initial EDI scores was used for assessment of the enamel damage. To detect differences between the groups, the Mann-Whitney test was used to analyze the data from the adhesive remnant index and the EDI.
The conventional group had more adhesive left on the enamel (P <0.001) than did the UV group. There was no difference between groups for the EDI (P = 0.729).
UV lighting allows significantly more adhesive removal without increasing the damage caused to the enamel.
我们的目的是评估在传统照明和紫外线（UV）光照下去除复合材料时的粘结剂残留量和牙釉质损伤情况。
根据去除粘结剂时所使用的光照条件，将38颗前磨牙分为2组。两组均使用低速多刃碳化钨车针进行此操作。紫外线组接受与紫外线相关的传统照明，传统组仅接受传统照明。使用软件通过在紫外线灯下拍摄的牙齿图像计算粘结剂残留量。根据牙釉质损伤指数（EDI）对粘结前和去除粘结剂后制作的牙齿环氧粘结剂复制品的扫描电子显微镜图像进行分级，并使用最终和初始EDI分数之间的差异来评估牙釉质损伤。为检测两组之间的差异，使用曼-惠特尼检验分析粘结剂残留指数和EDI的数据。
传统组在牙釉质上残留的粘结剂比紫外线组更多（P <0.001）。两组之间的EDI无差异（P = 0.729）。
紫外线照明可显著去除更多粘结剂，而不会增加对牙釉质造成的损伤。
