Objective      To explore the short-term efficacy of the reconstruction of acetabular bone loss with porous tantalum Jumbo acetabular component in revision hip arthroplasty.       Methods      Eighteen patients (18 hips) admitted in our center from september 2009 to september 2012 were enrolled in this study

and received acetabular replacement with tantalum Jumbo acetabular components. There were 8 males and 10 females

with the mean age of 56.8±15.3 years-old (ranging in 37-76 years-old). According to Paprosky classification

the acetabular bone defects were classified into 6 cases of type Ⅱb

7 cases of type Ⅱc

2 cases of type Ⅲa

and 3 cases of type Ⅲb. Data about prosthesis position

stability

bone ingrowth

survivorship

complications

Harris hip score and visual analogous scale (VAS) were analyzed.       Results      The mean follow-up time was 35.7 months (ranging in 24-54 months). To Paprosky Ⅱ

the Harris hip postoperative score (84.8±11.8) was significantly higher than the preoperative score (48.3±12.5) (t=-13.8

P0.01)

and the VAS postoperative score (1.1±0.7) was significantly lower than the preoperative score (3.8±1.5) (t=14.7

P0.01). To Paprosky Ⅲ

the Harris hip postoperative score (77.8±9.3) was significantly higher than the preoperative score (38.5±10.6) (t=-16.4

P0.01)

and the VAS postoperative score (1.9±1.2) was significantly lower than the preoperative score (5.1±1.6) (t=19.2

P0.01). All the acetabular components were well fixed based on the radiograph imaging results. No one had radiographic evidences of loosening

migration

radiolucent lines and osteolysis. Bone ingrowth was observed in all the patients. One case of dislocation occurred in the fourth week after the operation

and there was no infection or nerve injure. The survivorship of the tantalum Jumbo acetabular components was 100%.       Conclusion      The porous tantalum Jumbo acetabular component used for revision of acetabular bone defects shows good short-term therapeutic effect

and can simplify the operation

provide maximal surface contact between the components and the host bone

reduce the need for bone-grafting

promote bone ingrowth

and maximally normalize the hip center of rotation.