Clinical effect of cemented long stem prosthesis and memory alloy embracing fixator in the treatment of type B2 periprosthetic fractures

Abstract

Objective To study the clinical effect of cemented long stem prosthesis and memory alloy embracing fixator in the treatment of type B2 periprosthetic fractures. Methods Fom April 2014 to April 2016, 102 cases of peripheral B2 periprosthetic fractures patients were selected and randomly divided into bone cement long stem prosthesis revision surgery(group A) and revision of cemented long stem prosthesis combined with memory alloy embracing fixator( group B), each group with 51 cases.Clinical efficacy was evaluated according to Beals and Tower criteria, used Harris score to evaluate the hip the joint function, used the Visual Analogue Scale(VAS) score to evaluate the pain, after follow-up of 40 months, the clinical curative effect of 2 groups of patients, fracture healing time, complications and Harris score and VAS score were observed. Results The excellent rate of B group was significantly higher than that of A group, with statistical significance(90.2% vs.72.5%, χ2=5.239, P<0.05). Fracture healing time of group B was shorter than that of group A, with statistically significant ((10.2±2.5) weeks vs.(21.3±8.9) weeks, t=8.575, P<0.05). Harris the score of group B was higher than the group A, with statistically significant((89.9±13.5) points vs.(71.2±18.9) points, t=5.750, P<0.05). VAS score of group B was significantly lower than the group A, with statistically significant((1.23±0.25) points vs.(5.98±1.08) points, t=30.600, P<0.05). There were no complications such as infection, nonunion, loss of reduction and loosening of internal fixation in the 2 groups. Conclusion Revision of cemented long stem prosthesis combined with memory alloy embracing fixator is an ideal methods for the treatment of type B2 periprosthetic femoral fractures, which provides a good initial stability for fracture healing. Key words: B2 periprosthetic fracture; Revision of cemented long stem prosthesis; Memory alloy embracing fixator; Clinical efficacy