[Risk factors that have influence on acetabular erosion after a hip hemiarthroplasty in the treatment of subcapital fractures].

Objective: To determine the factors that influence in the erosion to acetabular in patients with later hemiprosthesis to a fracture of hip with a survival greater to 1 year.

Material And Methods: We made retrospective, comparative, descriptive and observational study, in patients who were used hemiarthroplasty for fracture of hip between January of 1997 and January of 2003. We obtained two groups of patients, those that had not undergone erosion and those that had erosion greater to 3 mm looked for similar characteristics, like age, pre passable cane or physical activity, overweight, sex, concomitances disease, degree of osteoporosis, function to cardiopulmonar, survival, size of prosthesis.