在前牙牙体缺损修复中,为满足美观的需要,常将冠边缘设置于龈下。不过,这是否会损害龈的健康,一直存在着争论、反对者认为冠边缘与龈的位置关系是影响龈健康的重要因素。冠边缘伸入龈下是促发局部龈炎和引起牙周炎的主要原因。冠边缘伸入龈沟内越深,对组织的破坏越严重。另一些学者则认为,在修复体影响龈健康的诸因素中,冠边缘适合性较其位置不同更有意义。只要伸入龈下的冠边缘适合性好,不波及龈附着,则不会对龈有 In the anterior tooth defect repair, in order to meet the aesthetic needs, often the crown edge set in the subgingival. However, it remains controversial whether this will damage the health of the gingival. Opponents argue that the relationship between the margin of the crown and the gingiva is an important factor affecting the health of the gingival. The extension of the crown into the subgingival margin is the main cause of gingivitis and periodontitis. The deeper the crown edge into the gingival sulcus, the more serious the damage to the tissue. Others argue that in terms of factors that affect the health of the gingiva, the correction of the coronal margin is more meaningful than its location. As long as the subglottic crown edges fit well, does not affect the gingival attachment, it will not have gingival