It is a chronic inflammatory condition that leads to irreversible tissue destruction involving loss of attachment between the tooth and periodontal-supporting tissue.
长期发炎的状况引起不可逆组织破坏，包括对牙齿和牙龈组织的粘附的丧失。
It is a chronic inflammatory condition that leads to irreversible tissue destruction involving loss of attachment between the tooth and periodontal-supporting tissue.
长期发炎的状况引起不可逆组织破坏，包括对牙齿和牙龈组织的粘附的丧失。
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