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ePaper created 2017-09-12, 09:26:18 | version 1.38.0
| study treatments of teeth with open apical foramen Success evaluation of N2 treated teeth with open apical foramen— A retrospective study Authors: Dr Anette Joschko, Dr Robert Teeuwen & Prof. Jerome Rotgans, Germany Abstract 95 teeth with open foramen were identified in a general dentist practice during the years 1985—2006, 75 of which could be followed-up by X-ray after an average time of 70 months (follow-up X-ray). 40 teeth were subject to vital extirpation (VitE), 28 teeth to vi- tal amputation (VitA), and seven teeth with necrotic pulp underwent conservative root canal treatment (RT). Apexification success rate amounted to 85.3 % (VitE 90 %, VitA 85.7 %, non-vital RT 57.1 %). Another 12 % could be judged as partial success in molars, as a certain number of the molar roots showed apexifi- cation, however, others not yet. The percentaged dif- ference of a successful apexification between vitally extirpated teeth and root canal treatment of non-vital teeth was significant (p = 0.0243). Apexification result was irrespective of the filling level of root canal treated teeth as well as of endodontic success. Endodontic failures resulted in ten cases (13.3 %). Statistic significance was found regarding failure rate of VitA (7.1 %) and root canal treatment of non-vital teeth (28.6 %, p = 0.0157). Within the observation period 19 out of the 95 teeth with open foramen (20 %) were extracted. There was a significant difference regarding extraction frequency between the VitE group (14.6 %) and the non-vital group (50 %, p = 0.0169). Fig. 1: Probability of survival of the 3 therapy groups with the target criterion “No Extraction”. 100 80 60 40 20 0 0 % Fig. 1 06 roots 3 2017 VitE VitA non-vital 50 100 150 200 250 300 months