Clinical Assessment of Resin-coating Technique for Dentin after Cavity Preparation

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 Purpose: Many studies have been conducted on the resin-coating technique for indirect restorations, and its efficacy has been reported. This study investigated the clinical course of cases with the resin-coating technique for dentin after inlay cavity preparation and examined the efficacy of the technique clinically.

 Methods: Twenty cases in 18 patients visiting one of three dental clinics that were collaborating with this investigation between September 2014 and October 2019 were evaluated. The patients were treated using the resin-coating technique by applying a thin coating material (Hybrid Coat Ⅱ, HC Ⅱ) after inlay cavity preparation. Patient dental and medical records as well as clinical information that included tooth site, procedures, materials used, and clinical symptoms before, during, and after the procedures and at the time of recall were obtained using set clinical evaluation criteria.

 Results: Fifty percent of the restorations were performed in premolars and 50% in molars. Local anesthesia was used in all cases except one. Resin coating was performed using HC Ⅱ alone in 40% of cases and HC Ⅱ combined with a flowable resin in 60% of cases. After inlay placement, 95% of the cases (19 cases) had a favorable outcome. Of the 10 cases (50%) where the patient experienced pain on cold water stimulation before treatment, nine cases had a favorable outcome; however, in one case pain on drinking cold water persisted and the patient then presented with pulpal symptoms, thereby requiring a pulpectomy.

 Conclusion: The results demonstrate the clinical efficacy of the resin-coating technique using HC Ⅱ on inlay cavity preparations.