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Methods: 63 anterior abutment free gingiva were observed with naked eye before and after restoration.
方法：肉眼观察63颗前牙在修复前后游离龈的色泽变化。
youdao
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Methods: 63 anterior abutment free gingiva were observed with naked eye before and after restoration.
方法：肉眼观察63颗前牙在修复前后游离龈的色泽变化。
youdao