How to repair an occlusal composite resin restoration on primary teeth? Case report

Laura Teixeira Mendes, Luciano Casagrande, Tathiane Larissa Lenzi


Facing need for reintervention in unsatisfactory restorations, clinicians may generally choose for replacement or repair. This paper reports a clinical case of repair of a composite resin restoration with failure in primary tooth. After prophylaxis and relative isolation, the portion of the composite resin to be repaired was roughed with a high-speed diamond bur to improve the mechanical bond between the aged and new resin (repair). Conditioning with 34% phosphoric acid gel was performed for 15 seconds, followed by washing and drying. One layer of the adhesive system Single Bond Universal (3M ESPE) was actively applied for 20 seconds and light- cured for 10 seconds. Finally, the flowable composite resin (Filtek Z350 XT Flow; 3M ESPE) was inserted and light-cured for 20 seconds. An adequate clinical protocol involving physical and chemical surface treatments is essential for the effectiveness of the intervention and the maintenance of the primary tooth clinically functional until physiological exfoliation.


Tooth, Deciduous; Dental restoration failure; Dental restoration repair


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