A spinal implant (10) configured for positioning within a space between adjacent vertebral bodies includes an upper end plate (100) including an outer surface (110) extending between first and second end surfaces (104, 108) and opposed side surfaces (114, 116). The outer surface includes a first convex profile (110a) extending between the first and second end surfaces and a second convex profile (110b) extending between the opposed side surfaces. The first convex profile and the second convex profile have different curvatures. The spinal implant further includes a lower end plate (200) and a core (300) disposed between the upper and lower end plates and coupled thereto. A method of assembling a spinal implant is also disclosed.