Abstract Objective To further compare the clinical outcomes of total hip arthroplasty(THA)through direct anterior approach (DAA) and posterior approach (PA).Methods We selected the consecutive cases of THA of our hospital from December 2013 to June 2016 according to the inclusion and exclusion criteria.All the 128 cases was divided into DAA group (57 cases) and PA group (71 cases).And the mean follow-up was 19.6 months.The operative time,blood loss,the leaving bed time,hospital stay,visual analog scale (VAS) and Harris score before operationwere recorded and analyzed.Meanwhile the acetabular anteversion angle and acetabular abduction angle were measured and analyzed.The postoperative complications were recorded.Results The blood loss of the DAA group (232.4±28.6)mL was shorter than the PA group(382.3±37.5)mL (P<0.05);the leaving bed time of the DAA group (1.8±0.7)d was shorter than the PA group (4.3±2.1)d (P<0.05);the hospital stay of the DAA group was(7.4±1.9)d was shorter than the PA group(9.2±2.3)d (P<0.05).However,the operative time of the DAA group(112.2±12.6)min was longer than the PA group(98.4±10.3)min (P<0.05).The VAS score of the DAA group (2.3±0.9)w as lower than the PA group (2.9±1.3) at one month (P<0.05),the Harris score of the DAA group (84.3±4.2) was higher than the PA group (80.6±6.5) at one month (P<0.05).The VAS score was (1.5±0.8) in DAA group and (1.3±1.1) in the PA group.The Harris score was (92.2±5.3) in DAA group and (90.5±6.8) in the PA group,which showed no significant difference between the two groups(P>0.05).The acetabular anteversion angle was (21.3±3.3)° in DAA group and (20.6±4.3)° in the PA group.The acetabular abduction angle was (39.8±5.4)° in DAA group and (41.3±5.0)° in the PA group,which showed no significant difference between the two groups(P>0.05).Conclusion Direct anterior approach of THA has less blood loss,earlier get out of the bed,shorter hospital stays less pain and good position of acetabular prosthesis while comparing with PA group.The clinical outcomes are satisfactoryat about 20 months,however,the longer results needed longer follow up studies.
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