By a spinal piercings several piercings are stitched vertical or horizontal (spinal ladder) in a row along the backbone.
This style of piercing belongs to the surface piercings, by whose always exists the risk of outgrowing and scar formation.
If you want to keep spinal piercings longer-ranged, you should pay attention of high care in dealing with it (hygiene, right clothing etc.). Then this piercing could heals completely, certainly this can take several months.
For jewellery curved barbells or surface barbells are applied, but you also can use ball closure rings. In any case you should be advised detailed of a serious piercer ahead every decision.