Percinoto C, Cunha R F, Delbem A C, Aragones A
Disciplina de Odontopediatria, Faculdade de Odontologia de Aracatuba-UNESP, Brazil.
Am J Dent. 1995 Feb;8(1):20-2.
To evaluate the penetration of a light-cured glass ionomer and a resin sealant into occlusal fissures and etched enamel.
Forty-eight maxillary and mandibular caries-free premolars scheduled for extraction for orthodontic reasons were isolated, the occlusal surfaces subjected to prophylaxis and acid-etched with orthophosphoric acid prior to the application of the VariGlass VLC glass ionomer and Concise resin sealants. The teeth were extracted, two longitudinal median sectiors from each tooth were ground to a thickness of 80-100 microns, and the sealant penetration into the fissures evaluated. The sections were placed in nitric acid to dissolve the enamel so the lengths of the tags which had penetrated into the etched enamel could be measured at different sites on the walls of the fissures.
Both sealants adapted well to the fissures but penetrated deeper into shallow, open fissures than into deep, constricted fissures. The VariGlass VLC tags into etched enamel were generally longer than the Concise projections.
评估光固化玻璃离子体和树脂封闭剂渗入咬合沟和酸蚀釉质的情况。
选取48颗因正畸原因计划拔除的无龋上颌和下颌前磨牙，进行隔离，在应用VariGlass VLC玻璃离子体和Concise树脂封闭剂之前，对咬合面进行预防性清洁并用正磷酸酸蚀。牙齿拔除后，将每颗牙齿的两个纵向正中切片磨至80 - 100微米厚，评估封闭剂渗入沟隙的情况。将切片置于硝酸中溶解釉质，以便在沟壁的不同部位测量渗入酸蚀釉质的标签长度。
两种封闭剂均能很好地适应沟隙，但相比深而狭窄的沟隙，它们渗入浅而开放的沟隙更深。VariGlass VLC渗入酸蚀釉质的标签通常比Concise的突起更长。
