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学习笔记 |儿童口腔结构发育:舌、腭与牙齿

  • 2026-02-10 15:30:01
学习笔记 |儿童口腔结构发育:舌、腭与牙齿

参考文献:黎海芪实用儿童保健学(第2版)[M]. 北京:人民卫生出版社,2022.

本文为关于儿童舌、腭及牙齿发育的核心功能、过程及相关要点的学习记录,仅为个人知识整理。

一、舌的发育

  • 主要功能
    1. 参与咀嚼食物,帮助形成食团以利吞咽。
    2. 作为重要的味觉器官。
    3. 辅助清洁牙齿。
    4. 参与发音。
  • 舌系带
    • 指舌腹侧延伸至口腔底部、由粘膜覆盖的弹性条索状肌肉组织。
    • 基本功能:在胎儿期,其功能是协调唇、舌与骨的生长。
    • 功能评估:临床上多采用 Hazelbaker评分 进行评估。

二、腭的发育

  • 形态与发育特点
    • 腭部呈倒三角形。
    • 不同年龄儿童的硬腭发育水平不同,通常年龄越小,腭弓越高
    • 有研究提示,母乳喂养的早产儿其腭骨骨化程度可能低于配方奶喂养的早产儿。

三、牙齿的发育

1. 牙齿的功能

  • 乳牙的主要功能
    • 完成对半固体食物的咀嚼。
    • 乳牙间的生理间隙有利于未来恒牙的萌出。
    • 为恒牙保留和占据正确的萌出位置。
    • 注意:2-5岁儿童若食物质地过软、咀嚼不足,可能导致换牙期出现“双排牙”(乳牙滞留)。
  • 恒牙的主要功能
    • 对颌面部的生长具有定位定高的作用。
    • 适应并完成对固体食物的咀嚼消化。

2. 牙齿的发育过程

  • 基本概念:牙齿发育包括矿化、萌出和脱落三个阶段。
  • 牙齿结构:包括牙釉质、牙本质、牙骨质、牙髓腔和牙根。
  • 萌出表现:牙齿萌出时可伴有低热、流涎、烦躁及睡眠不安等症状。
  • 萌出时间线
      • 乳牙:共20颗。一般在3岁内完全萌出。
      • 恒牙6岁左右:在第二乳磨牙后方萌出第一恒磨牙(即“六龄齿”)。7-8岁:开始换牙,顺序与乳牙萌出顺序基本相同。12岁左右第二恒磨牙萌出。17-18岁以后第三恒磨牙(智齿)开始萌出。全部恒牙共32颗,一般于20-30岁出齐。

    3. 与牙齿发育相关的因素

    • 营养素:健康的牙齿生长需要充足的蛋白质、钙、磷、维生素C、维生素D等。
    • 激素影响:甲状腺素对牙齿发育也有重要作用。
    • 异常提示:当出现牙齿发育异常时,需考虑是否存在外胚层发育不良、甲状腺功能减退等全身性疾病。
    • 萌出延迟13月龄后仍未萌出第一颗乳牙,称为萌出延迟。

    本文内容整理自相关学习资料,仅为个人学习记录。

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    1. CONNECT:[ UseTime:0.000979s ] mysql:host=127.0.0.1;port=3306;dbname=no_67808;charset=utf8mb4
    2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.001488s ]
    3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000786s ]
    4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000636s ]
    5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.001315s ]
    6. SELECT * FROM `set` [ RunTime:0.000654s ]
    7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.001492s ]
    8. SELECT * FROM `article` WHERE `id` = 467394 LIMIT 1 [ RunTime:0.001866s ]
    9. UPDATE `article` SET `lasttime` = 1771093695 WHERE `id` = 467394 [ RunTime:0.009746s ]
    10. SELECT * FROM `fenlei` WHERE `id` = 65 LIMIT 1 [ RunTime:0.003464s ]
    11. SELECT * FROM `article` WHERE `id` < 467394 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.001472s ]
    12. SELECT * FROM `article` WHERE `id` > 467394 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.001057s ]
    13. SELECT * FROM `article` WHERE `id` < 467394 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.002058s ]
    14. SELECT * FROM `article` WHERE `id` < 467394 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.003019s ]
    15. SELECT * FROM `article` WHERE `id` < 467394 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.006015s ]
    0.138355s