Complex sentence: It is theoretically technically possible to heal the multiple surface piercings that constitute a corset piercing, there are no well documented cases of this type of piercing being retained by an individual for longer than one year.
Split into simpler sentences: It is theoretically technically possible to heal the multiple surface piercings that constitute a corset piercing. However, there are no well documented cases of this type of piercing being retained by an individual for longer than one year.