Our results suggest that compared with CS , SS may provide superior bone remodelling and similar survival rates and clinical outcomes .
However , the short-term follow-up of the included studies was inadequate to determine the long-term performance of SS
OBJECTIVE Cementless total hip arthroplasty (  THA ) is associated with reliable clinical results and high patient satisfaction .
Short-stem prostheses ( SS ) were design ed to achieve superior preservation of proximal bone stock and stability compared with those of conventional-stem prostheses ( CS ) .
This meta- analysis was conducted to determine the proximal bone remodelling , revision rate , Harris Hip Score , radiolucent line and maximum total point motion values of both SS and CS for primary THA .
Comparison of Bone Remodeling Between an Anatomic Short Stem and a Straight Stem in 1-Stage Bilateral Total Hip Arthroplasty.
BACKGROUND Femurs of dysplastic hips exhibit specific abnormalities , and use of modular or specially design ed components is recommended . An anatomic short stem was previously design ed specifically for dysplastic hips using 3-dimensional data acquired from dysplastic patients . To investigate effects of stem geometry on bone remodeling , we undertook a prospect i ve , r and omized study of patients who had undergone 1-stage bilateral total hip arthroplasty ( THA ) with the anatomic short stem on one side and a conventional straight stem on the other . METHODS The study included 36 patients who underwent the above THA procedure . We assessed bone mineral density as well as the presence of cancellous condensation or bony atrophy due to stress shielding based on the analysis of Gruen 's zones and newly defined equal-interval zones , at an average follow-up period of 9.2 years . RESULTS All stems were bone ingrown stable . Cancellous condensation was observed more proximally , and areas of bone atrophy were narrower on the anatomic short stem side than on the straight stem side . Bone mineral density values reflected results of cancellous condensation and stress shielding and were higher in more proximal zones on the anatomic short stem side than on the straight stem side . CONCLUSION Although radiographic results indicated good midterm outcomes of THA with both stems , the loading pattern differed . The anatomic short stem achieved its design purpose in terms of proximal fixation and load transfer and led to better preservation of the proximal femur
Our results suggest that compared with CS , SS may provide superior bone remodelling and similar survival rates and clinical outcomes .
However , the short-term follow-up of the included studies was inadequate to determine the long-term performance of SS
OBJECTIVE Cementless total hip arthroplasty (  THA ) is associated with reliable clinical results and high patient satisfaction .
Short-stem prostheses ( SS ) were design ed to achieve superior preservation of proximal bone stock and stability compared with those of conventional-stem prostheses ( CS ) .
This meta- analysis was conducted to determine the proximal bone remodelling , revision rate , Harris Hip Score , radiolucent line and maximum total point motion values of both SS and CS for primary THA .