An expandable housing for an interbody fusion system has movable tapered external helical threaded members that travel along tracking to operably engage against the top and bottom shell members, urging them apart to cause expansion in the height of the housing. In an embodiment, the tapered members are disposed in a dual arrangement such that independentengagement of the tapered members along lateral portions of the top and bottom shells cause an angular tilt to the exterior surface of the housing when the tapered members are moved to different degrees. This function permits adjustment in the angular relationship between adjacent vertebrae and assists the lordotic adjustment of the patient’s spine. When the functions of the device are used in combination by the surgeon, the device provides an effective tool for in situ adjustment when performing lateral lumbar interbody fusion.一種用於介體融合系統之可擴張之殼體，其具有可移動的錐狀外螺旋螺紋構件，其等係沿著軌道行進以便可操作地抵壓並嚙合於該頂部與該底部外殼構件，因而迫使其等分離而導致開殼體在高度上擴張。在一具體實施例中，該錐狀構件係被設置為成對配置，使得該等錐狀構件各沿著該等頂部和底部外殼的側向部位作獨立的嚙合，使得在該等錐狀構件被移動至不同程度時，導致該殼體的外表面形成角度傾斜。此一功能允許調整在相鄰椎骨之間的角度關係，並協助調整病人的脊柱之脊柱前凸狀況。當外科醫生結合運用該裝置的功能在進行外側腰部介體間融合術時，該裝置可提供一種有效的現場調整工具。
