6-year Results of a Controlled Trial in Class 2 cavities

Objectives: The aim of the study was to test a new ormocer in class 2, using or not a flowable as liner. Methods: A CT was scheduled on 100 patients, 41 males and 59 females, between 22 and 61, with 3 class II cavities with floor and cervical margins in dentin for each one. The materials selected were Admira and Admira Bond (AB), AB+ flow (ABV) (Voco), P60 and SB1(PS), PS+flow(PSM) (3M-Espe), Solitaire and Confort Bond (SC), SC +flow (SCH) (Heraeus-Kulzer), Definite and Etch&Prime 3.0 (DD) (Degussa).There were five groups of patients, with 20 subjects for any group, for a total of 100 restorations for any Voco group and 100 for all the controls.The procedures were done according with manufacturer's instructions with the same clinical protocol by three expert operators. The restorations were evaluated by one independent examiner with an intra-agreement > 80%, with a loop (4.5x) according with USPHS modified criteria at baseline, 6,12,24,36,72 months. A statistical analysis with Mann-Whitney non parametric test was performed (p=.05).Results: After 6 years 70 patients and 210 restorations were assessed;there were 7 failures in group AB and 5 failures in ABF without any significant difference between the groups;the control groups had 70 restorations with 41 failures, without any statistical difference using or not a flow liner. Conclusions: Within the limits of this clinical trial the new ormocer worked at the same level with or without a flowable liner, the control groups showed catastrophic results.