Periprosthetic fractures during primary total hip arthroplasty for developmental dysplasia of the hip in 9 cases / 中国组织工程研究

From February 2002 to May 2007,9 cases(9 hips) of periprosthetic fractures during the primary total hip arthroplasty for developmental dysplasia of the hip were selected,including 1 male and 8 females aged 52-69 years.In the primary total hip arthroplasty,femoral prosthesis with the same size as intramedullary reamer and acetabular prosthesis with 2 mm diameter larger than acetabular reamer were used.The pain,function,range of motion and degree of deformity were accessed using the Harris score.The patients were followed for 1-6 years.Among the 9 patients with periprosthetic fractures,4 acetabular fractures were stable which were treated by additional augmentation screws,and 1 fracture was unstable which was treated by structural bone grafting and additional screws.And there was one Vancouver type AG fracture which was treated by cerclage wire,3 Vancouver B1 fractures which were fixed by locking compression plate(LCP) or cerclage wire,and one Vancouver type C fracture which was also fixed by LCP.No component loosening or migration was found in the postoperative X-ray.The mean Harris score was 87.2 at the final follow-up.The results of the study show that during the primary total hip arthroplasty in patients with developmental dysplasia of the hip,the oversize of the acetabular component should be controlled to equal to or less than 2 mm.For patients with severe osteoporosis,acetabular components with the same size to reamer are recommended combined with additional screws,or cemented cup.When an acetebular fracture is found during total hip arthroplasty,we could use additional screws or bone grafting.Once a periprosthetic femoral fracture occurs during the operation,methods of fixation should be selected based on the type of the fracture and stability of the prosthesis.

Acetabulum revision alone in 11 patients following total hip arthroplasty / 中国组织工程研究

Eleven patients underwent acetabulum revision using modified anterolateral approach due to acetabulum loosening but femoral prosthesis in sound fixation following total hip arthroplasty in Department of Joint Surgery,Tianjin Hospital between August 2002 and February 2005. During the mean follow-up of 4.2 years,all 11 patients gained primary stable fixation and good function. One patient underwent another revision due to infection; one developed femoral prosthesis loosening and underwent femoral revision. X-ray of the other patients showed no loosening or dislocation or radiotransparent region surrounding the prosthesis. One patient developed lateral femoral cutaneous nerve injury and relieved 6 months later.

Clinical results of bipolar femoral head arthroplasty compared with hollow-pin internal fixation for treatment of femoral neck fracture in aged patients over 80 years / 中国矫形外科杂志

0.05).No sign of aseptic loosening or change in implant position was noted.[Conclusion]This short-term study showed that bipolar femoral head arthroplasty seems to be a suitable alternative for primary treatment of displaced femoral neck fractures in patients over 80 years.More attention should be paid to coexisting medical illness(e.g.diabetes mellitus,hypertension,and ischaemic heart disease)and prevention of complications.