In an embodiment, a positioning apparatus for guiding an injection device relative to a target surface having a representative plane is provided. The apparatus includes a housing defining a channel configured to receive an injection device, wherein a first angle is formed between a longitudinal axis of the channel and the representative plane of the target surface so as to guide the injection device through the channel to the target surface at the first angle, and wherein the housing comprises a stabilizing surface configured to abut the target surface to stabilize an injection according to the first angle.
