The hand surgeon has three options for operating on the wrist. If an arthroscope is used, puncture holes are made where the scope enters the skin and pushes through the tissue into the joint. There may be only a tiny incision. The incision could be along the back of the wrist (dorsal), the front of the wrist (volar) or slightly between the two called dorsoradial.
Sometimes the location of the incision is determined based on the problem and the treatment for it. For example, when bone grafting is used, surgeons prefer the volar approach. Again, this refers to the inside of the wrist -- the area you are asking about.
If the fracture is on the side of the bone towards the wrist, a dorsal approach is used. The scope is inserted along the backside of the wrist. This method is not used if there is any concern about loss of blood supply to the bone.
You may have nothing to worry about if the surgeon has planned surgery from the dorsal side. Ask him or her to describe the operation for you. It's best to ask questions and express your concerns now before surgery.