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ePaper created 2017-09-12, 09:26:18 | version 1.38.0
Result The average age of the patients was 10.7 years (6–25). Most cases (N=54) were attributed to man- dibular molars (72 %), among these mostly the first lower molars with 48 cases (50.5 % of the cases to be analyzed), followed by nine cases of maxillary incisors. 75 cases were subject to one or—in intervals—multi- ple follow-up X-rays. 40 teeth (53.3 %) were extir- pated vitally, 28 teeth (37.3 %) were amputated vitally and seven non-vital teeth (9.3 %) underwent conserva- tive endodontic treatment. Post-endodontic clinical control averaged at 73 months (12–271), the fol- low-up X-rays to be evaluated at 70 months (10–228). In 41 cases, X-ray evaluation was done more than 48 months after endodontic therapy. The longer therapy dated back, the earlier achieve- ment of the treatment aim apexification or apex- ogenesis could be verified. Two cases featured open apical foramina even 16 respectively 30 months post treatment. In nine molars, the apical foramina of various roots were partly still open, partly already closed after an average of 28 months. Thus their re- sults could only be judged as partial success. An av- erage post-observation time of 71 months was reg- istered in 55 cases with the diagnosis ‘apex closed without lengthening of the root’. A ‘closed apex with root growth’ could be stated in nine cases after an average of 117 months (see case 1) . The average age of the nine young patients with root growth amounted to 9.5 years, those without root growth had an average age of 11.2 years. Overall, an apexification success was found in 64 cases (85.3 %, confidence interval 77.3–93.3 %). In nine other multi-rooted teeth (12 %), the maturation process of the roots was differently distinct: The same tooth featured a root with closed apical foramen, whereas another root still showed an open foramen. Maturation progress of the immature teeth was ob- | study treatments of teeth with open apical foramen Fig. 4a Case 2: Male (born 28 December 1980): Tooth 14 Fig. 4a: 18 August 1989 ante Judged as endodontic failure were: pain or fistula at treated tooth, development of apical periodontitis, lingering or newly developed apical periodontitis. vitalextirpation. Fig. 4b: 18 August 1989 post Treatment success of the 75 cases was analysed in vitalextirpation. Fig. 4c: 16 January 2004 status. two modes considering the questions: · Did apexification/apexogenesis occur? · Did the apex remain unaffected of apical periodon- titis? In multi-rooted teeth with different apical diagno- sis, the worst diagnosis was assumed as being valid for the tooth. A double magnifier served as diagnostic aid. Three persons evaluated the X-rays independently from each other: The doctoral candidate (author AJ), a dentist with ten years of professional experience and the practice owner (author RT). The final diagnosis resulted from the consensus of the three ratings. Statistic significance was assumed for an error as- sumption of p < 0.05 for comparison of two parame- ters and calculated by means of the logrank test. Fig. 4b Fig. 4c 10 roots 3 2017