{'fraction_non_alphanumeric': 0.0293778801843318, 'fraction_numerical': 0.03513824884792627, 'mean_word_length': 5.554716981132075, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
Preventive Effect of Autologous Bone Marrow Stem Cell Transplantation on Avascular Necrosis of the Femoral Head:Treatment of 44 Cases of Fresh Femoral Via-neck Type Fracture

Objective:To investigate the preventive effect of autologous bone marrow stem cell transplantation on avascular necrosis of the femoral head in treatment of fresh femoral via-neck type fracture.Methods:44 cases of fresh femoral via-neck type fracture were treated by autologous bone marrow stem cell transplantation combined with AO internal fixation technique.43 cases of the control group are treated with three AO cannulated screw.MRI examination was performed and therapeutic effect was evaluated with Harris score in two groups.Results:12 and 24 months later,Harris scores in prevention group were 67.21±10.82,86.43±11.52 respectively and in control group Harris scores were 54.72±12.23,74.32±14.43 respectively.There was statistical difference between the two groups(P0.05).12 months after surgery,3 cases of femoral head necrosis was revealed by MRI examination in prevention group while 10 cases in control group,and there was statistical difference between the two groups(P0.05).24 months after surgery,5 cases of femoral head necrosis was revealed by MRI examination in prevention group while 13 cases in control group,and there was statistical difference between the two groups(P0.05).Conclusion:Autologous bone marrow stem cell transplantation combined with AO internal fixation is a simple,safe and effective method for preventing avascular necrosis of the femoral head in treatment of fresh femoral via-neck type fracture.It can improve articular function and has good compliance.It's a new method in treating fresh femoral via-neck type fracture.