These studies did not show a satisfactory overall survival rate
Background and purpose The aim of short-stem total hip arthroplasty is to preserve proximal bone stock for future revisions , to improve biomechanical reconstruction , and to make minimally invasive approaches easier .
It is therefore being increasingly considered to be a sound alternative to conventional total hip arthroplasty , especially for young and active patients .
However , it is still unknown whether survival rates of short-stem  hips match current st and ards .
We made a systematic summary of reported overall survival after short-stem total hip arthroplasty .
[Periprosthetic femoral bone reaction after total hip arthroplasty with preservation of the collum femoris : CT-assisted osteodensitometry 1 and 3 years postoperatively].
BACKGROUND Short-stemmed cementless femoral components in total hip arthroplasty have been design ed to preserve the proximal femoral bone stock by load transfer to the femoral metaphysis . An in vivo method of computed tomography-assisted ( CT ) osteodensitometry after total hip arthroplasty is presented which differentiates between cortical and cancellous bone density ( BD ) changes around uncemented femoral components . PATIENTS AND METHODS Cortical and cancellous periprosthetic femoral BD ( mg Ca HA/ml ) was determined prospect ively in 31 patients at day 10 , 1 year and 3 years after total hip arthroplasty with preservation of the collum femoris ( C.F.P.-stem , Link , Hamburg , Germany ) using computed tomography-assisted osteodensitometry .  Clinical results ( Harris hip score ) and plain x-rays were assessed in all cases . RESULTS Progressive proximal cortical BD loss was observed between the 1 year ( Ø -8 % ) and 3 year ( Ø -22 % ) postoperative measurements . Distal to the trochanter minor no significant cortical BD changes were observed . Proximal cancellous BD decreased progressively between the 1 year ( Ø -33 % ) and 3 year ( Ø -45 % ) analyses . The Harris hip score improved from 45 points pre-operatively to 93 points at the 3 year follow-up . All x-rays showed signs of stable ingrowth . CONCLUSION Periprosthetic CT osteodensitometry has the technical ability to discriminate between cortical and cancellous bone structures with respect to strain-adapted remodeling . Progressive proximal cortical and cancellous BD loss indicates that metaphyseal fixation can not be achieved with the analyzed C.F.P. stem design . The lack of cortical BD loss below the trochanter minor suggests diaphyseal fixation of the implanted stem
These studies did not show a satisfactory overall survival rate
Background and purpose The aim of short-stem total hip arthroplasty is to preserve proximal bone stock for future revisions , to improve biomechanical reconstruction , and to make minimally invasive approaches easier .
It is therefore being increasingly considered to be a sound alternative to conventional total hip arthroplasty , especially for young and active patients .
However , it is still unknown whether survival rates of short-stem  hips match current st and ards .
We made a systematic summary of reported overall survival after short-stem total hip arthroplasty .