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Córdova-Malca Fernando,Coaguila-Llerena Hernán,Garré-Arnillas Lucía,Rayo-Iparraguirre Jorge,Faria Gisele 대한치과보존학회 2022 Restorative Dentistry & Endodontics Vol.47 No.4
Although the success rates of microsurgery and micro-resurgery are very high, the influence of a recurrent perforation combined with radicular cyst remains unclear. A 21-year-old white female patient had a history of root perforation in a previously treated right maxillary lateral incisor. Analysis using cone-beam computed tomography (CBCT) revealed an extensive and well-defined periapical radiolucency, involving the buccal and palatal bone plate. The perforation was sealed with bioceramic material (Biodentine) in the pre-surgical phase. In the surgical phase, guided tissue regeneration (GTR) was performed by combining xenograft (lyophilized bovine bone) and autologous platelet-rich fibrin applied to the bone defect. The root-end preparation was done using an ultrasonic tip. The retrograde filling was performed using a bioceramic material (Biodentine). Histopathological analysis confirmed a radicular cyst. The patient returned to her referring practitioner to continue the restorative procedures. CBCT analysis after 1-year recall revealed another perforation in the same place as the first intervention, ultimately treated by micro-resurgery using the same protocol with GTR, and a bioceramic material (MTA Angelus). The 2-year recall showed healing and bone neoformation. In conclusion, endodontic micro-resurgery with GTR showed long-term favorable results when a radicular cyst and a recurrent perforation compromised the success.
S. Anuradha Jabasingh,D. Lalith,Pavithra Garre 한국공업화학회 2015 Journal of Industrial and Engineering Chemistry Vol.23 No.-
The study was aimed at investigating the efficacy of chitin immobilized Mucor racemosus sorbent (CIMRS) sorbent, impregnated in the modified rotating disc contactor (MRDC) blades for the sorption of chromium(VI) contained in the electroplating effluent. The optimum time, pH, temperature and CIMRS dosage were found to be 8 h, 7.0, 323 K and 0.7 g/150 mL, respectively, for MRDC sorption studies. Desorption studies were also carried out in MRDC at 60 8C. Seven isotherms were applied to model the experimental data. The present study reveals highly promising nature of CIMRS for Cr(VI) sorption from electroplating effluent.