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Effect of apexification on prognosis of infected abnormal central cusp teeth

YANG Jie,ZHU Ling,MA Hua-si.Nanjing Medical University Stomatology Institute,Department of Pediatric Dentistry of The Affliated Stomatology Hospital of Nanjing Medical University,Nanjing 210029 China.  
Objective:To study the effect of apexification on curative efficacy and apical closure of infected abnormal central cusp teeth.Method:59 infected abnormal central cusp teeth collected from 26 cases were treated with apexification.Result:After two years follow-up observation,the success rate in terms of clinical symptoms was 100%,while in terms of apical closure the success rate was 93.22%.14 teeth with convergent apex obtained physiological apical shapes and average time taken to obtain apical closure was 6.64 months.Among 19 teeth with parallel apical walls,8 teeth obtained physiologi-cal apical shapes,11 teeth obtained apical closure but didn't obtain narrow root canal and average time was 10.58 months.Among 26 teeth with divergent apex,3 teeth obtained apical closure,19 teeth ended with calcification bridge in apex and 4 teeth with irregular calcification bridge post-treatment and average time was 16.91 months.During treatment the apical di-ameter of teeth with apicoformation progressively decreased in size from 1.99 mm to 0.88 mm,yet it was larger than healthy contralateral teeth(p=0.03, 0.05).Conclusion:Infected abnormal central cusp teeth could obtain favourable prognosis with apexification.Clinical efficacy of different apical foramen shape teeth had no statistical significance.Teeth with convergent or parallel apical shapes were apt to result in physiological apical shapes post-treatment;divergent apex of the teeth before treatment hindered apical closure.
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