Study on the effects of APL bioanatomical fixation of femoral stem prosthesis THA

ObjectiveTo explore the clinical effects of APL bioanatomical fixation of femoral stem prosthesis artificial total hip arthroplasty(THA).

MethodsAmong 60 patients with aseptic necrosis of femoral head, 28 cases were treated with APL bioanatomical fixation of femoral stem prosthesis THA(observation group), and 32 cases were treated with bone cement-type prosthesis THA(control group).The operation-related indicators and complications were recorded in two groups.The visual analog scale(VAS), Harris hip functional score(HHS) and osteoarthritis score(WOMAC) were evaluated before surgery, after 1 month of surgery and at the last follow-up.

ResultsThe operation time and unequal length of both lower limbs in observation group were significantly lower than those in control group(P < 0.01).There was no statistical significance in the intraoperative blood loss and hospital stay between two groups(P>0.05).For the two groups after 1 month of surgery and at last follow-up, the VAS scores were significantly lower than those before surgery, and the HHS score and WOMAC score were significantly higher than those before surgery(P < 0.01).The VAS score at the last follow-up was lower than after 1 month of surgery, while the HHS score and WOMAC score were higher than after 1 month of surgery in two groups(P < 0.01).The VAS score, HHS score and WOMAC score between two groups before surgery and after 1 month of surgery were not statistically significant(P>0.05).At the last follow-up, the difference of VAS scores between two groups was not statistically significant(P>0.05), and the HHS score and WOMAC score in observation group were significantly higher than those in control group(P < 0.01).There was no statistical significance in the incidence rate of complications between two groups(P>0.05).

ConclusionsThe APL bioanatomical fixed femoral stem prosthesis THA is feasible in the treatment of aseptic necrosis of femoral head, and the short-term curative effect is significant.The postoperative prosthesis is stable, and the lower limbs are of good equal length.