This website uses cookies to ensure you get the best experience on our website.
PHPSESSID is used by PHP for session management, en4_language is used for storing user language preference, en4_locale is used for user locale preference and Local storage is being used for storing your privacy preferences (if guest user)
Domain: This Site (mail.myworldgo.com)
ملفات تعريف الارتباط المستخدمة
牙頸部為什麼會有缺損?牙唇、頰側頸部硬組織的缺損呈楔形稱楔狀缺損,是複合因素慢性長期作用的結果。主要是牙頸部的結構比較薄弱,易被磨去;牙頸部是合力應力集中區,長期的咀嚼使牙體組織疲勞,應力集中;刷牙方法不當等綜合因素致牙頸部出現缺損。
تعليقات