PMC5727556_01
Failed OV amalgam filling in tooth 36 and an old occlusal amalgam restoration in tooth 37.
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fig1
After a complete clinical examination, it was determined that both teeth were vital (Figure 1).
Elimination of the failed 36 OV amalgam and the occlusal amalgam in tooth 37 under rubber dam isolation.
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Brasseler GmbH & Co., Germany), attempting to spare a healthier dental structure (Figure 2).
Adhesive procedure. (a) Application of 37.5% phosphoric acid for 15 sec in enamel. (b) The dentin is now being etched for 15 sec. (c) A thin layer of primer is being applied. (d) Glossy aspect of the bonding layer once the technique is finished.
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fig3
An air jet allowed for primer runoff and solvent volatilization, after which a thin layer of bonding was applied and light-cured for 20 sec (Bonding, OptiBond FL, Kerr, Orange, CA, USA) with a light-emitting diode (LED) curing light unit (Coltolux  LED, Coltene/Whaledent Inc., OH, USA) (Figure 3).
Flowable bulk-fill resin has been applied (SureFil SDR flow, DENTSPLY, Konstanz, Germany).
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fig4
A layer of flowable bulk-fill resin (SureFil SDR flow, DENTSPLY, Konstanz, Germany) was then applied at the base surface of both tooth preparations in single-layer increments until the dentin was completely full, leaving sufficient space (approximately 1 mm) to apply an enamel resin material (Figure 4).
Vestibular wall of tooth 36 has been restored with a layer of conventional high-refractive-index resin (UE1, Micerium S.P.A., Avegno, GE, Italy).
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To complete the occlusal morphology of both teeth, a conventional stratification resin was selected (UE1, ENA HRi, Micerium S.P.A., Avegno, GE, Italy) that was applied in single-layer increments to complete the final anatomy of the lost enamel, after which it was light-cured for 40 sec (Figures 5 and 6).
The complete enamel has been restored with a conventional composite resin. Notice the correct anatomy achieved in both teeth.
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fig6
To complete the occlusal morphology of both teeth, a conventional stratification resin was selected (UE1, ENA HRi, Micerium S.P.A., Avegno, GE, Italy) that was applied in single-layer increments to complete the final anatomy of the lost enamel, after which it was light-cured for 40 sec (Figures 5 and 6).
Resin pigments were used to characterize the depths of pits and fissures.
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Avegno, GE, Italy) (Figure 7). A final polymerization through a layer of glycerin was performed for 40 sec for each tooth to eliminate the polymerization inhibition layer.
Immediate result after polishing and finishing.
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A and Shiny B, Micerium S.P.A., Avegno, GE, Italy) and a final aluminum oxide paste (Shiny C, Micerium S.P.A., Avegno, GE, Italy). An immediate control image is shown in Figure 8 and 18-month follow-up in Figure 9.
Image taken at the 18-month follow-up.
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fig9
A and Shiny B, Micerium S.P.A., Avegno, GE, Italy) and a final aluminum oxide paste (Shiny C, Micerium S.P.A., Avegno, GE, Italy). An immediate control image is shown in Figure 8 and 18-month follow-up in Figure 9.