【Yang Yeh】評論

摘錄自Sturdevant's Art and Science of Operative DentistryCh18 Class II Cast-Metal Restoration pp. e122A disadvantage of skirting is that it increases the display of metal on the facial and lingual surfaces of the tooth. For this reason, skirts are not placed on the mesiofacial margin of maxillary premolars and irst molars. Skirting the remaining three line angles of the tooth provides ample retention and resistance forms.因為skirting會露出邊緣的金屬，美觀因素不適用於Mesialfacial margin of maxillary premolar & molar