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2. ÊÒà˵Øà©¾ÒзÕè (Local causes) ÍÒ¨à¡Ô´¨Ò¡

                                ¡ÒáÃзº¡ÃÐá·¡ºÃÔàdzãºË¹ŒÒ ËÃ×Í ÍØºÑµÔà赯 ( laryngoscopy, local acute

                                mechanical trauma)

                                Electric burn, Radiation

                                ¡ÒÃÍÑ¡àʺ੾ÒзÕè (»ÅÒÂÃÒ¡¿˜¹¹íéÒ¹ÁÍÑ¡àʺ ÁÕ¼ÅãËŒà¡Ô´¤ÇÒÁ¼Ô´»¡µÔ¢Í§¼ÔÇ

                                à¤Å×ͺ¿˜¹¢Í§¿˜¹á·Œ·Õè¡ÓÅѧ¨Ð¢Öé¹)






















                    ÀÒ¾·Õè 3  à´ç¡ÍÒÂØ 10 »‚ ·Õèä´ŒÃѺ Chemotherapy áÅÐ Radiotherapy ¢³ÐÍÒÂØ 2 »‚  [2]



































                            ÀÒ¾·Õè 4  Amelogenesis Imperfecta ª¹Ô´ Hypocalcification (a),

                                       Hypomaturation (b) áÅÐ Hypoplasia (c)     [2]










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