An envelope flap is a gingival flap (i.e. does not extend apical to the mucogingival junction) created by making a sulcular incision and elevating some of the attached gingiva on the lingual and buccal aspects with no vertical releasing incisions. | An envelope flap is a gingival flap (i.e. does not extend apical to the mucogingival junction) created by making a sulcular incision and elevating some of the attached gingiva on the lingual and buccal aspects with no vertical releasing incisions. |