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通常认为牙齿缺失后如不及时修复会造成牙周组织及咬合的改变,第一磨牙缺失后的变化尤其典型,如两侧邻牙会向缺牙隙倾斜或移位,对(牙合)牙伸长,牙槽骨萎缩,牙周袋形成及垂直距离减少等。这些观察仅以临床经验为基础而缺乏实验证明,缺乏牙周和咬合变化的长期研究报告。本文研究了第一磨牙缺失对牙列和牙齿支持结构的影响及拔牙后缺牙间隙闭合的速度和程度。材料和方法:有上颌或下颌第一磨牙缺
It is generally believed that if the tooth is missing, it will cause periodontal tissue and bite changes if not repaired in time. The change after the first molar loss is especially typical. For example, the adjacent teeth on both sides will tilt or shift to the missing tooth gap, Elongation, alveolar bone atrophy, periodontal pocket formation and vertical distance reduction and so on. These observations are based on clinical experience and lack of experimental evidence, the lack of periodontal and occlusal changes in the long-term study. This article studies the effect of first molars loss on dentition and tooth support structures and the speed and extent of occlusion of missing teeth after tooth extraction. Materials and Methods: There is a lack of maxillary or mandibular first molar