牙冠美容并非人人适用0

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牙齿问题不仅是健康问题，还影响个人的形象，由此，牙齿美白、美容冠、牙饰等众多牙齿美容方式应运而生。然而，过分追求美牙，不顾健康去美牙，已让一些人走入牙齿美容的误区。特别是美容牙冠，这只是牙齿美容的治疗方法之一，在很多情况下美容牙冠并不是最佳的选择。如牙齿排列不齐或牙齿严重前突的患者，正畸应该是首选治疗方法；如果牙齿仅是颜色、形态存在缺陷，则可采用全瓷贴面、全瓷北京中科医院亲身经历冠的方法来获得美观的效果。因此，美容牙冠不是万能的，也并非人人适用。

过度美白会损伤牙釉质

洁白的牙齿固然美观，但并非越白越好。牙齿的颜色源自于牙釉质，健康的牙釉质外观呈白色半透明状。牙齿的颜色与釉质厚度和矿化程度有关，矿化程度越高，釉质越透明，其深部牙本质的黄色越容易透过而使牙齿呈淡黄色；矿化程度低则釉质透明度差，牙本质颜色不能透过而呈乳白色。因此，健康的牙齿往往白中略带点淡黄色。

牙齿美白过度最容易造成牙齿敏感。尽管目前并没有研究证明美白牙齿会对牙本质造成什么伤害，但临床上常常会遇到一些患者因过度牙齿美白出现牙齿敏感，或者将原有的敏感问题加重。有的患者可能两三天就会恢复，但也有些患北京中科医院亲身经历者可能会越来越敏感，遇到一些刺激时感到更难受。

牙齿美白过度还易损伤牙釉质。牙齿美白是指将化学氧化性漂白药物放在牙齿表面，药物与牙齿发生化学反应使牙齿本身的颜色变白。长期使用“美白牙贴”或频繁接受美白治疗，容易损伤牙齿表面，特别是对于牙釉质天生发育不全的患者损害更大。美国牙科协会建议，14岁以下儿童不应做牙齿美白，以免引起牙齿损伤。

牙齿美容不能一劳永逸

针对不同的牙齿问题，美容的手段也不同，包括美容冠、贴面修复、牙齿美白、牙齿矫治、洁牙治疗等。不同治疗手段其远期疗效也各不相同。

牙齿漂白属于牙齿脱色技术，目前全球最流行的是冷光牙齿美白。它是通过特殊冷光源照射覆盖在牙面上的漂北京中科医院是治啥的白剂，使之短时间内去除渗入牙齿硬组织中的外来色素，而达到改变牙齿颜色的目的。因为牙齿还会接触色素，效果可以持续两年。

洁牙治疗也并非一劳永逸。由于一些食物和饮料有颜色，牙齿上还会堆积一些色素，特别是长期吸烟和喜欢喝深色饮料的人，色素的沉积尤其明显，牙齿变色更快，需要定期进行洁牙治疗。

最适合的才是最好的，牙齿美容也不例外。要充分考虑与牙龈、嘴唇的协调，以及与肤色、个性等元素的协调，牙齿整体形态与面容和谐，才能收到最佳的牙齿美容效果，别去追求“明星牙”。（邹争春朱广平整理）

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正畸有风险但不会造成永久损伤

正常情况下，每颗牙都有一定的生理动度，以缓冲咀嚼北京中科医院是治啥的压力。矫正牙齿使牙齿松动度增加，这是正常反应。矫正到正常位置停止移动后，牙齿能通过自身的修复能力使牙周膜重新附着而变稳固，不会发生永久性损伤。

尽管矫正牙齿不会造成牙齿松动，但这并不意味着正畸箍牙就没有风险。如果不积极配合医生或接受不正规的正畸治疗，也会对牙齿健康造成影响。

风险一：引起牙槽吸收。在带正畸牙箍时，由于口腔内突然多了许多矫治器，口腔清洁相对困难，如果不做好口腔清洁，容易引进牙龈炎症，长时间的牙龈炎症未得到有效控制，就会导致牙槽吸收。如果牙槽骨吸收程度较轻，治疗后随着口腔卫生的好转，牙槽骨通常会恢复正常；若吸收严重，治疗后可能会留下永久性牙槽骨损伤。

风险二：牙根吸收。在矫治移动牙齿时，牙周膜、牙槽骨会根据受力方向进行相应的吸收、增生等组织改建反应。如果矫治力过大或用力不当，则会引起牙根表面吸收，导致牙根长度变短。外貌年龄计算器自测你的衰老程度

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