Abstract:Objective To observe the therapeutic effect of biological agents in the treatment of hip osteoarthritis patients undergoing total hip arthroplasty (THA). Methods A total of 128 patients with HOA who were admitted into our hospital from June 2016 to December 2017 were randomly divided into observation group and control group. All patients were given THA combined with routine treatment. The observation group was given additional biologics. The pain score, Harris score, serum CRP, IL-18, S100A12 and MMP-13 levels were observed before and after treatment. The imaging K-L classification and adverse reactions were evaluated before and after treatment. Results There was no significant difference in blood volume, operation time or postoperative drainage volume between the two groups (P?>?0.05). Pain score decreased while the Harris score increased significantly after 12 weeks of treatment when compared with those prior to any treatments (P?0.05), which was more obvious in the observation group when compared with those in control group (P?0.05). The serum levels of CRP, IL-18, S100A12 and MMP-13 as well as K-L classification were decreased significantly after treatment when compared with those prior to any treatments (P?0.05), which was more dramatic in observation group when compared with those in control group (P?0.05). The image stabilization rate of observation group was significantly higher than that of the control group (P?0.05) while there was no significant adverse reaction between the two groups. Conclusions Total hip arthroplasty combined with biological agents exerts improvement in hip joint function recovery probably through modulation on inflammatory response and S100A12/MMP-13 related signal pathways.