Simple Gait Analysis After Manual Total Hip Arthroplasty With SuperPATH Approach And Traditional Hardinge Approach

Objective : To investigate the difference of simple gait parameters in the total hip arthroplasty(THA)between SuperPATH approach(Supercapsular Percutaneously Assisted Total Hip)and traditional Hardinge approach.Methods:Following stringent inclusion criteria and exclusion criteria,selected 40 patients from May 2016 to December 2016 had been treated at the Joint Surgery Department of Huangdao Hospital Affiliated Hospital of Qingdao University,and 40 patients who met the criteria were scheduled to undergo primary total hip arthroplasty(total hip joints).40 patients were included in the study and randomly divided into two groups,20 patients were treated by SuperPATH approach(Biotyped prosthesis Provided by Shanghai MicroPort Orthopedic Medical Technology Co.,Ltd.)(group A)and 20 patients were treated by traditional Hardinge approach(Accolade II prosthesis provided by Stryker,USA)(group B).20 healthy people were scheduled to the control group.The age,sex,body mass index(BMI)and disease status of the three groups were not statistically different and comparable.Footprint method was used to collect the early gait parameters such as walking velocity,cadence,and step length at 5d,4w and 12 w,and to record whether the patient had poor incision healing,limb infection and other complications.Results : The surgical patients were included in the study and no cases were lost.Both groups had good postoperative results.Postoperative pelvic anterograde X showed satisfactory placement of the prosthesis.There was no dislocation after follow-up and no postoperative limbs,Infection,incision healing and other complications were observed.Gait parameter study results: In SuperPATH group the step speed at postoperation,5d,4w,12 w,were 30.02m/min,37.99m/min and 44.08m/min;In traditional Hardinge group the step speed at postoperation,5d,4w,12 w,were 26.79m/min,35.95m/min,44.27m/min;In SuperPATH group the cadence at postoperation,5d,4w,12 w,were 68.48steps/min,75.07steps/min,83.58steps/min;In traditional Hardinge group the cadence at postoperation,5d,4w,12 w,were 68.77steps/min,74.78 steps/min,82.92steps/min.;In SuperPATH group the step length at postoperation,5d,4w,12 w,were 44.34 cm,50.74 cm,53.02cm;In traditional Hardinge group the step length at postoperation,5d,4w,12 w,were 38.94 cm,48.19 cm,54.57cm;When SuperPATH group and traditional Hardinge group compared,in SuperPATH group the step speed at postoperation,5d,4w and the step length at postoperation,5d,were significantly better than the Hardinge group.In the 2 groups the cadence at postoperation,5d,were not statistically significant;There was no statistical difference in cadence and step length at postoperation,4w.At 12 weeks after operation,there was no statistical difference in step speed,cadence,step length between the two groups.Compared with the normal control group,the SuperPATH group had a difference in step speed with the Hardinge group only 5d after surgery,and there was no difference between4 w and 12 w after surgery.However,the gait parameters at 12 weeks after operation in the two groups were still different from those in healthy individuals.Conclusion:Supercapsular Percutaneously Assisted Total Hip was superior to the traditional Hardinge approach group in the postoperative 5d and 4w step speed,and the hip muscle function recovered rapidly after surgery.There was no significant difference in the gait parameters data between the two groups of patients after 12 w,but there was still a gap compared with the normal control group.The SuperPATH approach is an option for minimally invasive(MIS)THA with the advantage of early patient recovery.