After endodontic treatment and post hole preparation, a glass fiber post (ø 1.5 mm, Luxapost, DMG) was inserted into the canal. However, the post was too small to fit the root canal. 

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... was caused by hitting a solid bowl, and the fractured surface had been separated neatly due to an instantaneously applied strong force. The labial margin was present 1 mm below the marginal gingiva, and the lingual margin was supragingival ( Figure 2). The patient visited the clinic approximately 5 hours after the trauma, and the broken tooth was brought to the clinic in milk. The comparison of the shape of the fractured fragment with the retained tooth structure indicated that there was no significant discrepancy. Additionally, the patient wanted to preserve the fractured fragment. Therefore, fractured fragment reattachment was performed after endodontic treatment, and a glass-fiber post was inserted into it for retention. Because the labial margin was located in the subgingival region, a gingivectomy was performed using an electro-surgery kit (PerFect TCS, Whaledent, Mahwah, NJ, USA) under 2% lidocaine HCl (Xylestesin-A, 3M ESPE, Seefeld, Germany) anesthesia. For post insertion, a post hole was prepared by extending half of the length of the root. When the suitability of the glass-fiber post (Luxapost, ø 1.5 mm, DMG, Hamburg, Germany) was examined, the width of the glass-fiber post was considerably smaller than the diameter of the post hole (Figure 3). Therefore, post relining was selected to improve fitness. The indirect technique was considered to adjust the post relining and confirm the exact fracture line location. This technique was considered to be easy, to reduce chair time, and to make production easier. An impression was performed using Aquasil Rigid and XLV (Dentsply Caulk, Milford, DE, USA), and a working cast was fabricated with red stone. Relining of the glass-fiber post was performed using the method reported by Faria-e-Silva et al . 7 Glycerin gel was applied to the working cast as a separating medium and air-thinned. The surface of the fiber post was treated with CoJet Sand (CoJet Sand, 3M ESPE), and a silane coupling agent (Calibra, Dentsply Caulk) was ...