索引词Early exfoliation of teeth、乳牙过早脱落、乳牙过早脱落 [possible translation]
同义词premature loss of primary teeth、Premature loss of teeth、premature shedding of deciduous tooth、Premature shedding of primary deciduous tooth、premature shedding of primary tooth、deciduous teeth, premature shedding、precocious exfoliation of primary teeth
乳牙过早脱落(Premature loss of primary teeth)是指乳牙在其正常生理替换期前因非自然替换因素导致的提前丧失。乳牙的替换时间因具体牙位而异(如乳中切牙通常于6-7岁脱落),若在对应牙位的恒牙尚未发育至萌出阶段时发生脱落,则视为乳牙过早脱落。此现象可能影响颌骨发育、咀嚼功能及恒牙列排列,增加错颌畸形风险。