Long-term results of the cementless porous-coated anatomic total hip prosthesis

Abstract

Between January 1984 and January 1986, 131 porous-coated anatomic total hip replacements were performed in 119 consecutive patients. Of these, 100 patients (110 hips) who were alive at a minimum of 18 years after replacement were included in the study. The mean age of the patients at surgery was 48.4 years and that of surviving patients at the latest follow-up was 67.8 years. The mean duration of the clinical and radiological follow-up was 19.4 years (18 to 20). The mean Harris hip score initially improved from 55 points before to 95 points at two years after operation, but subsequently decreased to 91 points after six years, 87 points after 11.2 years, and 85 points after 19.4 years. At the final follow-up, 23 hips (18%) of the entire cohort and 21% of survivors had undergone revision because of loosening or osteolysis of the acetabular component and eight hips (6%) of the entire cohort and 7% of survivors for loosening or osteolysis of the femoral component. Only four femoral components (4%) were revised for isolated aseptic loosening without osteolysis and two (2%) for recurrent dislocation. On the basis of these long-term results, the porous-coated anatomic femoral component survived for a minimum of 18 years after operation while the acetabular component was less durable. The findings identify the principles of uncemented joint replacement which can be applied to current practice.

Intraprosthetic Dislocation: A Specific Complication of the Dual-mobility System

“…After initial enhancement of primary fixation and secondary osseointegration of the acetabular cup achieved in 1993, the reported survival rates of 90% to 96% at 12 to 22 years [2,17,19,20] were similar to those reported with noncemented implants [4,9,10]. In 1998 the polyethylene (PE) liners were changed by increasing crosslinking to reduce PE wear rate [7] although before that time the wear rates (approximately 70 mm 3 /year [1,8]) were comparable to those reported in the literature with metal and conventional PE bearing couples [1].…”

Primary total hip arthroplasty with dual mobility socket to prevent dislocation: a 22-year follow-up of 240 hips

“…No other THA concept has this kind of result on THA stability, not even large head diameter metal-on-metal or ceramic-onceramic THA series. (Tables 1 and 2) If we compare our series to other cementless THA series [8][9][10][11][12][13][14][15][16][17], or cemented THA series [19][20][21][22], our series survival rate was similar. Mean global cementless THA survival rate was less than 80% at 15 years (from 76 to 88%).…”

A Monoblock Porous Tantalum Acetabular Cup Has No Osteolysis on CT at 10 Years

“…This contrast is most apparent when the implant in this study is compared with modular titanium implants [8,15,33]. There is a paucity of data in the literature evaluating a monoblock porous tantalum acetabular cup.…”

“…THA relieves pain and improves functional scores and quality of life in the patients with advanced osteoarthritis of the hip [8,15,18,21,25,33]. Despite consistentlyreproducible, positive improvements in pain and functional scores, a number of factors limit the longevity of THA prostheses.…”