Objectives: The objective of this retrospective study was to assess long-term stability of core build-ups fabricated customizing fiber posts with a silorane-based composite resin in one dental practice.
Methods: Of ninety-two endodontically treated teeth receiving custom-made aesthetic posts forty-eight were evaluated up to 4 years after cementation. After root-canal treatment, if the canal was too large, a fiber post system (RelyX Fiber Post, 3M ESPE) was relined with a low-shrinking composite resin (Filtek LS, 3M ESPE). An adhesive specific for the composite resin was applied to the selected post. A water-soluble lubricant was used for the canal before injecting the composite resin with a syringe (AccuDose high viscosity, Centrix Inc.). After light curing the post system was removed and light cured again outside the mouth. The post was tested for passivity and the core was built. The canal was cleaned with sodium hypochloride and the posts with alcohol before cementation with a self-adhesive resin cement (RelyX Unicem2, 3M ESPE). Subsequently metal-free restorations made with a zirconia-based substructure (Lava, 3M ESPE) and a lithium dissilicate restoration (E-max, Ivoclar Vivadent) were cemented with a self-adhesive resin cement (RelyX Unicem (2), 3M ESPE). Patients were evaluated every 6 months on periodontal maintenance.
Results: After a period of 4 years only one tooth failed. A maxillary lateral incisor crown and post became loose and could be recemented.
Conclusions: Within the limitations of this study, it can be concluded that after 4 years custom made aesthetic posts fabricated with a low-shrinking composite resin performed extremely well. A low-shrinking composite resin may be used as core build-up successfully.