Views: 0 Author: Site Editor Publish Time: 2025-06-16 Origin: Site
North America Distal Tibial Intramedullary Nail 2025, Top15
Distal tibial periankle fractures are commonly seen in clinical practice, accounting for approximately 7.2%–32% of all tibial fractures. Extra-articular fractures of the distal third of the tibia account for about 14.5% of distal tibial fractures. This area lacks soft tissue protection, and over 50% of high-energy medial tibial injuries are open fractures. Due to the proximity of the distal tibia to the ankle joint, these fractures are often difficult to reduce and fixate, with poor local soft tissue coverage and blood supply, making them a particularly challenging type of traumatic fracture.
Treatment options include conservative and surgical approaches. Conservative management involves skin traction, skeletal traction, casting or splinting, and brace immobilization. Surgical treatment is guided by the soft tissue damage classification (AO), fracture classification (AO/OTA), or Gustilo classification for open fractures. External fixation typically involves the use of external fixators, while internal fixation uses anatomical plates on the medial/lateral distal tibia or antegrade/expert tibial intramedullary nails. However, these fixation methods have limitations. Medial plating can lead to postoperative skin necrosis or infection due to poor soft tissue coverage and vascularity in the distal tibia. Moreover, antegrade expert tibial nails often result in poor reduction and stability, limiting their clinical application.
Distal tibial periankle fractures (within 10–11 cm above the ankle) account for 7.2%–32% of tibial fractures, with poor soft tissue coverage and vascularity. Traditional medial plating may lead to necrosis or infection.
Antegrade nails risk poor distal alignment; expert nails are complex and may offer limited stability.
The Distal Tibial Intramedullary Nail (DTN) is indicated for a variety of tibial conditions, including simple, spiral, comminuted, long oblique, and segmental shaft fractures (particularly of the distal tibia), as well as distal tibial metaphyseal fractures, non-/mal-unions; it may also be employed, often with specialized devices, for managing bone defects or limb length discrepancies (such as lengthening or shortening).
Short segment fractures of the distal tibia near the ankle, including closed/open fractures or fractures involving the distal 1/5 of the tibia or metaphysis (AO/OTA 43.A1, 43.A2, 43.A3);
Distal tibial fractures involving the ankle joint (AO/OTA 43.C1, 43.C2), such as Pilon fractures. The indications are similar to DTN.
AO/OTA 43.A1–A3 (extra-articular fractures), 43.C1–C2 (partial intra-articular fractures).
Cases with ipsilateral knee replacement that preclude antegrade nail insertion.
Severely comminuted Pilon fractures involving the articular surface;
Severely contaminated wounds (Gustilo type III);
Severe osteoporosis;
Local soft tissue or bone infections, long-segment defects, or pathological fractures.
Under epidural or general anesthesia, the patient is placed supine. A pneumatic tourniquet (60 kPa) is applied to the proximal thigh. After standard disinfection and draping, closed reduction is attempted with fluoroscopy; reduction clamps or minimally invasive tools may be used. The entry point at the medial malleolus is confirmed fluoroscopically: on the AP view, it is 4 mm (for φ7 nail) or 5 mm (for φ8 nail) above the medial cortex; on the lateral view, it aligns with the central axis of the medial malleolus.
A 2 cm longitudinal incision is made on the medial malleolus, between its anterior and posterior margins. The superficial deltoid ligament is exposed and split longitudinally. A proximal protection sleeve is placed, and a guide pin is inserted parallel to the medial cortex until it reaches the outer cortex of the metaphysis. Fluoroscopy confirms proper position.
A hollow reamer is advanced along the guide pin to the stop mark, followed by a solid reamer. A trial nail determines the optimal length: short nails for metaphyseal fractures, long nails if the fracture extends into the shaft. The targeting jig is connected via locking bolts. The nail is inserted; resistance may require gentle rotation.
Under jig guidance, three distal cancellous screws and two proximal cortical screws are placed. If fibular fracture is present, it must be reduced and fixed first to restore length and alignment and avoid tibial malalignment. Postoperatively, ankle rotation tests assess stability. Final fluoroscopy confirms reduction and fixation.
Entry point: AP view – 4 mm (φ7) or 5 mm (φ8) above medial cortex; lateral view – central axis of medial malleolus.
Incision: 2 cm medial longitudinal cut, deltoid ligament split, sleeve placement.
Reduction and nailing:
Fix fibula first if fractured.
Insert guide pin parallel to medial cortex.
Ream and insert nail; lock with 5 screws (3 distal cancellous, 2 proximal cortical).
Minimally invasive: subcutaneous operation preserves soft tissue, reduces infection.
Biomechanical stability:
Medial curvature disperses stress, limits deformity (supported by Kuhn et al.).
Combined with fibular fixation, improves axial/torsional strength (Bonnevialle et al.).
Convenient: short learning curve, no costly tools required.
Limited indication range due to nail size (max 140 mm) and locking hole spacing (7 mm), only applicable to fractures 25–95 mm above the ankle.
Risk of iatrogenic injury to the distal tibiofibular syndesmosis if locking screw angles are incorrect.
Entry via medial malleolus may damage the great saphenous vein or tarsal tunnel.
Intramedullary insertion strengthens the medial column but does not allow compression or stabilize the lateral column without fibular fixation.
Ankle pump exercises and straight leg raises begin 24 hours post-op.
Gradual weight-bearing: partial at 6 weeks, full at 3 months (based on fracture type).
Routine anticoagulation to prevent deep vein thrombosis.
Broad-spectrum antibiotics for open fractures during perioperative period.
Avoid syndesmotic injury by precisely angling distal locking screws.
"With anatomical adaptability and minimally invasive technique, retrograde tibial intramedullary nailing significantly improves reduction quality and early rehabilitation efficiency in distal periankle fractures. It provides a reliable solution for high-energy injuries in patients with fragile soft tissue conditions."
Gao Mingming, Liu Qingjun, Zhu Jianfei, et al. Retrograde Intramedullary Nailing for Distal Tibial Periankle Fractures [J]. Chinese Journal of Orthopaedics, 2024, 44(19): 1280–1287.
