An expandable implant for insertion in an intervertebral space defined between a first vertebral body and a second vertebral body, the implant defining an insertion end spaced apart from an trailing end along a longitudinal direction, the implant comprising: a first plate; a second plate opposed to the first plate along a vertical direction that is perpendicular to the longitudinal direction; a first wedge member and a second wedge member spaced from the first wedge member along the longitudinal direction, the first and second wedge members (22; 24) each including: a narrow end (75; 175) spaced apart from an inner end (76; 176) along the longitudinal direction; a first side and an opposed second side each extending 1) along the longitudinal direction between the inner ends (76; 176) and the narrow ends (75; 175) and 2) along the vertical direction; and an actuation member coupled to the first wedge member and the second wedge member, the actuating member defining a flange extending toward the first and second plates (18; 20), the actuation member configured to translate the first and second wedge members (22; 24) from a first contracted configuration into a second separated configuration so as to separate the first plate from the second plate along the vertical direction; characterized in that the first and second wedge members (22; 24) each include one or more ridges (82;182) protruding from a respective one of the first and second sides in a transverse direction that is perpendicular to the longitudinal and vertical directions (L; V), the one or more ridges (82; 182) elongated in a direction between the inner (76; 176) and narrow (75; 175) ends of the respective wedge member (22; 24), the one or more ridges (82; 182) configured to couple the first and second plates (18; 20) together, wherein the inner ends (76; 176) of each wedge member face one another, and the first and second wedge members (22; 24) are configured to translate along the longitudinal direction along the first and second plates (18; 20) from the first contracted configuration into the second separated configuration. a first plate; a second plate opposed to the first plate along a vertical direction that is perpendicular to the longitudinal direction; a first wedge member and a second wedge member spaced from the first wedge member along the longitudinal direction, the first and second wedge members (22; 24) each including: a narrow end (75; 175) spaced apart from an inner end (76; 176) along the longitudinal direction; a first side and an opposed second side each extending 1) along the longitudinal direction between the inner ends (76; 176) and the narrow ends (75; 175) and 2) along the vertical direction; and an actuation member coupled to the first wedge member and the second wedge member, the actuating member defining a flange extending toward the first and second plates (18; 20), the actuation member configured to translate the first and second wedge members (22; 24) from a first contracted configuration into a second separated configuration so as to separate the first plate from the second plate along the vertical direction; characterized in that the first and second wedge members (22; 24) each include one or more ridges (82;182) protruding from a respective one of the first and second sides in a transverse direction that is perpendicular to the longitudinal and vertical directions (L; V), the one or more ridges (82; 182) elongated in a direction between the inner (76; 176) and narrow (75; 175) ends of the respective wedge member (22; 24), the one or more ridges (82; 182) configured to couple the first and second plates (18; 20) together, wherein the inner ends (76; 176) of each wedge member face one another, and the first and second wedge members (22; 24) are configured to translate along the longitudinal direction along the first and second plates (18; 20) from the first contracted configuration into the second separated configuration. a narrow end (75; 175) spaced apart from an inner end (76; 176) along the longitudinal direction; a first side and an opposed second side each extending 1) along the longitudinal direction between the inner ends (76; 176) and the narrow ends (75; 175) and 2) along the vertical direction; and an actuation member coupled to the first wedge member and the second wedge member, the actuating member defining a flange extending toward the first and second plates (18; 20), the actuation member configured to translate the first and second wedge members (22; 24) from a first contracted configuration into a second separated configuration so as to separate the first plate from the second plate along the vertical direction; characterized in that the first and second wedge members (22; 24) each include one or more ridges (82;182) protruding from a respective one of the first and second sides in a transverse direction that is perpendicular to the longitudinal and vertical directions (L; V), the one or more ridges (82; 182) elongated in a direction between the inner (76; 176) and narrow (75; 175) ends of the respective wedge member (22; 24), the one or more ridges (82; 182) configured to couple the first and second plates (18; 20) together, wherein the inner ends (76; 176) of each wedge member face one another, and the first and second wedge members (22; 24) are configured to translate along the longitudinal direction along the first and second plates (18; 20) from the first contracted configuration into the second separated configuration.