By a corset piercing several piercings are stitched vertical and symmetrical along the back.
These can binded up together like a corset.
Usually this style of body jewellery is only stitched temporarily, e.g for a photo shoot, a fashionshow or other performances.
A completely healing couldn´t be guarantied also by these surface piercing, but it´s quite possible with appropriate care (hygiene, right clothing etc.) and above all patience.
For piercing jewellery ball closure rings (BCR) are used, though they aren´t suitable for permanent carrying, because they grow out. If you want keep it long range, you should decide for surface barbells. On these, special attachments can applied, which replace the rings.