Abstract:Objective To compare the axial deviation between hybrid and circular frame for tibial bone defect.Methods From May 2013 to August 2019,forty-eight cases of tibial bone defect were treated by bone transport in our hospital.Among them,25 cases were fixed with hybrid frames(hybrid group),and 23 cases were fixed with circular frames(circular group).In the hybrid group,there were 18 males and 7 females,with an average age of (48.64±10.55)years (range,28~73 years),and an average course of disease of (19.44±16.41)months and length of bone defect of (7.48±2.39)cm.In the circular group,there were 18 males and 5 females,with an average age of (47.22±9.24)years (range,25~66 years),and an average course of disease of (18.52±10.04)months and length of bone defect of (7.78±2.31)cm.The axial angulation and incidence of axial deviation were compared between the two groups after operation and at the time of bone stumps were close to contact,and the external fixation index,bone healing time,incidence of pin loosening,bony results,and functional results were compared.Results All the patients were followed up for 16~32 months,with an average of (23.21±4.43)months.After operation,there was no axial deviation in both groups,and the axial angulation had no significant difference between the two groups(P>0.05).At the time of bone stumps were close to contact,the incidence of axial deviation and axial angulation in the hybrid group were lower than those of the circular group (P<0.05).The incidence of pin loosening in the circular group was higher than that of the hybrid group(P<0.05).There were no significant difference in the external fixation index,bone healing time,bony results,functional results,and rate of pin tract infection between the two groups(P>0.05).Conclusion Compared with the circular frame,the hybrid frame can better prevent the occurrence of axial deviation in the process of tibial bone transport.
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