0.05),and with significant differences as the TCM group and the WM group compared with TCM plus WM group(P

BACKGROUND:Bone transport has been used for a variety of reasons in bone defects with good clinical results.However,various complications have also attracted the attention of practitioners and the avoidance of non-healing of the docking point has become a common concern for doctors and patients. OBJECTIVE:To explore effective methods of avoiding non-healing of the docking point in the treatment of tibial bone defects by bone transport so as to shorten the treatment period and reduce the pain of patients. METHODS:The clinical data of 21 patients with unilateral tibial bone defect admitted to the No.910 Hospital of Joint Logistics Support Force of Chinese PLA from January 2018 to January 2021 were retrospectively analyzed,including 16 males and 5 females,aged(32.8±10.3)years,with an average bone defect length of 10.2 cm.All 21 patients received bone transport surgery,during which the bone defect area was filled with bone cement to reduce the adverse factors affecting the healing of the docking point.The Association for the Study and Application of the Methods of Ilizarov,healing index and incidence of adverse reactions were evaluated during postoperative follow-up. RESULTS AND CONCLUSION:The 21 patients were followed up for 15 to 24 months after surgery,and the extended area was all well mineralized and had no malformations,and no refractures occurred during treatment.Among them,one patient had foot drop,which could not be completely corrected after surgical release of the Achilles tendon and wearing foot and ankle orthotics.19 patients had different degrees of needle tract infection,and no deep infection occurred after timely needle tract nursing.The healing rate of the docking point was 100%;the healing index was 36-45 d/cm and the average was 38 d/cm.The Association for the Study and Application of the Methods of Ilizarov showed that bone healing was excellent in 17 cases(81%)and poor in 4 cases(19%).The results of limb function were excellent in 18 cases(86%)and good in 3 cases(14%).These findings show that bone cement segmental filling during bone transport is an effective method to solve the non-healing of the docking point,shorten the patient's treatment period and reduce the patient's pain.

CRISPR-Associated Protein 9 ; Gene Editing ; CRISPR-Cas Systems/genetics*