Transverse Tibial Bone Transport (TTT) in the Management of Chronic Diabetic Lower Extremity Wounds

Inclusion Criteria: * Adults (\>=22 years). * Chronic diabetic foot ulcer wound persisting \>=12 weeks and less than 104 weeks refractory to standard wound care. * Wound location within distal 1/3 tibia and below including foot. * Wound stages: WiFi \>= 3 * At least one patent lower extremity tibial vessel (after revascularization if needed). * Able to provide informed consent and comply with study procedures. Exclusion Criteria: * Active systemic infection (positive blood cultures) * Severe sepsis (2 out of 4 SIRS criteria with impact on organ dysfunction) * Subacute lower extremity wound \<12 weeks with or without standard wound cares * Internal hardware within 10cm of possible TTT placement * Most proximal aspect of wound within 10cm of most distal pin of possible TTT placement * End Stage Renal Disease requiring dialysis * Renal function values * eGFR: \<15ml/min and * Creatinine: \>6mg/dL and * BUN: \>50 mg/dL * Wounds less than 1 cm3 or greater than 30 cm3 * Corticosteroids \>10mg prednisone equivalent daily for \>2 weeks * Patients with osteomyelitis in the ipsilateral tibia at planned corticotomy site * Cognitive or social limitations precluding consent or follow-up * Current participation in another investigational study (drug or device) * Immunocompromised (WBC \<4) or undergoing active chemotherapy * Hemoglobin A1c \>12 * BMI \<18.5 kg/m2 * Pregnant, lactating, or planning to become pregnant * Life expectancy less than 12 months * Severe hepatic impairment defined by patient on a transplant list, MELD \> 20, Child's class C. * A history of conditions that may impair wound healing in the opinion of the Investigator, for example, autoimmune disorders, renal failure patients on dialysis, or medications that impair the healing process.