Abstract:

Objective To investigate the therapeutic effect and influencing factors of hopeless teeth with Stage Ⅳ Grade C periodontitis after complete periodontal treatment. Methods A total of 63 patients with Stage Ⅳ Grade C periodontitis were enrolled in this retrospective study. Their 307 hopeless teeth were divided into the retained group and the lost group according to the retention two years later. In the retained group,teeth were further divided into the improved group and the unchanged group considering whether bone resorption was restored to mid-third of root on the image and clinical examination. According to the clinical data, age, gender, dental position,underlying disease, smoking status, family genetics, dentition integrity, type of periodontitis, treatment process and baseline periodontal clinical indicators were measured and analyzed. Results The 2-year survival rate of 307 teeth was 83.1%, and the prognosis was significantly improved in 46.2% of the teeth. The family genetics, integrity of dentition,timeliness of one-month review, regularity of maintenance treatment, surgical conditions,and clinical indicators of affected teeth at the baseline were statistically different between the retained group and the lost group. Regression analysis showed that the main risk factors were no flap surgery, family history, baseline deep attachment loss value and high looseness. Conclusion For Stage Ⅳ Grade C periodontitis, most hopeless teeth can be preserved in the short term. In clinical treatment, personalized treatment plan should be carried out according to risk factors to improve the retention rate.

Key words: Stage Ⅳ Grade C periodontitis, hopeless teeth, therapeutic effect