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1·Conclusion the gingival recession and the wedge shaped defect are common dental diseases in the elderly.

结论牙龈退缩与楔状缺损是中老年人常见的牙病。

2·Objective to investigate the incidence of the gingival recession and the wedge shaped defect in elderly population and relative factors.

目的探讨中老年人牙龈退缩和楔状缺损的发生率和相关因素。