PMC7476693_01
Plain radiography at the time of injury. Right 3rd finger metacarpal shaft fracture with shortening and mild rotatory deformity was noted. (a) Frontal view.(b) Oblique view.
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F1
On plain radiography, oblique fracture of the metacarpal shaft with shortening and mild rotatory deformity was noted (Fig. 1a and b).
Intraoperative fluoroscopic image. Intramedullary pinnings were inserted antegradely and retrogradely, respectively, (a) frontal view, (b) oblique view.
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F2
A 1.2-mm mini fixator pin was percutaneously inserted antegradely from the base of the metacarpal bone as an intramedullary pinning and another 1.2-mm mini fixator pin was retrogradely inserted from a site proximal to the Metacarpophalangeal (MP) joint capsule of the metacarpal bone neck as intramedullary pinning (Fig. 2a and b).
Plain radiography and macroscopic findings with JuNction  locked wires fixator attachment.(a) Frontal view on plain radiography.(b) Oblique view on plain radiography.
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F3
In addition, the inserted two mini fixator pins were connected using "JuNction" while retaining the manually reduced position to externally reduce and fix the fracture region (Fig. 3a and b).
Plain radiography and range of motion after 12 months. Bone fusion had been acquired on plain radiography (a) frontal view, (b) oblique view. The wound scar on the dorsum of the hand was not noticeable (c), and no restriction of flexion (d) or extension (e) of the MP joint was noted.
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F4
On the final follow-up (12 months after surgery), bone fusion had been acquired without limitation of the range of motion of the finger joints including the MP joint, the patient had returned to a daily life and ballet dancing with VAS of 0/10 and Q-DASH of 2.27/100 without a problem (Fig. 4a-e).