Method of forming an oral care implement

A method of forming an oral care implement comprising a base structure having a handle portion and a head portion, the method comprising:

• a) providing a first mold that defines a first mold cavity, the first mold cavity comprising a first portion that corresponds to the handle portion of the base structure, a second portion that corresponds to the head portion of the base structure, and a first mold cavity axis;
• b) injecting a first material into the first portion of the first mold cavity via a first injection orifice with a first hot runner sub-system, the first injection orifice forming a first passageway into the first portion of the first mold cavity and aligned along a first plane that comprises the first mold cavity axis;
• and
• c) injecting a second material into the first portion of the first mold cavity via a second injection orifice with a second hot runner sub-system, the second injection orifice forming a second passageway into the first portion of the first mold cavity and aligned along the first plane that comprises the first mold cavity axis, the second material being injected into the first material to displace the first material, thereby forming the base structure such that the second material forms a core component of the base structure and the first material forms a shell component of the base structure that surrounds the core component, the first and second injection orifices are located on the same side of a second plane that comprises the first mold cavity axis and is orthogonal to the first plane.