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ePaper created 2017-09-12, 09:26:18 | version 1.38.0
| technique biomaterial for root canal filling Fig. 4: Preoperative radiograph of tooth #47 of a 32-year-old female patient. Fig. 5: Postoperative radiograph after completion of endodontic treatment. Fig. 6: Occlusal view of the access cavity before coronal restoration. Fig. 7: Preprosthetic coronal restoration with a Fig. 4 Fig. 5 Fig. 6 bonded composite resin. Fig. 8: CAD/CAM overlay for coronal restoration. Fig. 9: Six-month postoperative recall. Fig. 7 Fig. 8 Fig. 9 overlay. She was recalled at 6 and 12 months after treatment. She no longer experienced a sinusitis and the tooth was asymptomatic. The 12-month recall showed complete healing of the periapical lesion (Fig. 3). Thereby, the treatment may be con- sidered as successful. The root canals were rinsed again with sodium hy- pochlorite and 17 % EDTA, and then dried. BioRoot was placed inside each canal with a spiral (800 rpm) and gutta-percha points were poured into the material and gently placed inside the canals up to the working length (Fig. 5). Case 2 A 32-year-old female was referred to our endo- dontic department by her general practitioner for treatment on tooth #47 (Fig. 4). The patient re- ported a long painful dental history on this tooth. Root canal treatment had been initiated six months before, and several practitioners tried to complete the root canal treatment, unsuccessfully. The patient complained about severe pain, numbness and loss of sensitivity of the mandible each time the access cavity was closed with a temporary filling. An intraosseous injection (one cartridge arti- caine + 1/100,000 epinephrine (Septodont) was com- pleted and root canals were shaped and disin- fected with a large volume of sodium hypochlorite activated with Irrigatys (ITENA). The canals were dried, and temporary filled with a calcium hydrox- ide based medication. Access cavity was filled with a temporary filling and the crown was drilled for occlusal reduction. At the second visit, the root canal treatment was completed. Because the proximity of the in- ferior dental nerve, everything was done to avoid any extrusion of dental material. Because of its excellent biotolerance and non-toxicity, BioRoot RCS was considered as the material of choice for filling the root canals. The coronal restoration was completed on a third visit with a CAD/CAM bonded overlay (Figs. 6–8). The patient never complained of any pain, neither discomfort. The six-month recall radiograph confirms the complete healing of the apical lesions (Fig. 9). Case 3 A 31-year-old female patient was referred for a root canal retreatment on tooth #46 (Fig. 10). This tooth had already been retreated twice re- cently, but the patient still complained about pain and abcesses since the tooth had been restored with a post placed into the distal root. Because the post was not visible on the preop- erative radiograph, it was assumed that it might be a fibre post. The shape of the interradicular lesion let us suspect a zipping perforation into the inter- radicular area. Root canal retreatment was completed in one visit. The fibre post of distal root and root canal fill- ing material were removed with rotary and manual instruments. The four root canals were then reshaped and desinfected with 3 % sodium hypochlorite with mechanical activation and 17 % EDTA. During the retreatment process, an interradicular perforation (mesial side of the distolingual root canal) was highlighted (Fig. 11). 50 roots 3 2017