The Thickness of the Adhesive Layer Increases the Misdiagnosing of the Radiolucent Zones and Restoration Replacement Indication

作者：Frohlich Tatiana Tambara; Nicoloso Gabriel Ferreira; Lenzi Tathiane Larissa; Maxnuck Soares Fabio Zovico; Rocha Rachel De Oliveira^*

来源：Journal of Esthetic and Restorative Dentistry, 2017, 29(3): 193-200.

DOI：10.1111/jerd.12297

ObjectiveTo evaluate the influence of the thickness of the adhesive layer and demineralized dentin on the decision to replace composite restoration.
Materials and MethodsEighty human third molars with occlusal preparations (Class I) were randomly assigned to eight groups (n=10): adhesive system (Clearfil SE Bond [CSE] or Scotchbond Universal Adhesive [SBU]); the number of adhesive layers (one or two); and substrate (sound or demineralized dentin). A blinded examiner evaluated radiographs of each restored tooth. Obtained scores for the presence or absence of radiolucent zone under restoration were submitted to a relative risk (RR) calculus and Z-test, and the scores for the decision to replace restorations were submitted to Fisher's exact test (p<0.05).
ResultsThe relative risk of identifying a radiolucent zone under restoration in sound and demineralized dentin were, respectively, 2 and 1.85 times higher when two layers of adhesive were applied. Demineralized dentin did not increase the probability of identifying a radiolucent zone. A higher relative (1.6, p=0.01) was observed when two layers of SBU were applied. The number of layers did not influence the relative risk for CSE (RR=1.3, p=0.13).
ConclusionThicker layers of SBU increase the relative risk of identifying a radiolucent layer under restoration and the decision to replace a/composite restoration, irrespective of the substrate. The presence of demineralized dentin did not increase the probability of identifying a radiolucent zone when compared to sound dentin.
Clinical SignificanceThe results of this in vitro study suggest that thicker layers of a particular adhesive under resin composite restorations can negatively influence the decision to replace them. (J Esthet Restor Dent 29:193-200, 2017)

• 出版日期2017-6