Introduction

This study sought to evaluate the patient experience and short-term clinical outcomes associated with the hospital stay of patients who underwent robotic arm-assisted total knee arthroplasty (TKA). These results were compared to a cohort of patients who underwent TKA without robotic assistance performed by the same surgeon.

Aims: The aim of this retrospective study was determine the survivorship of bipolar arthroplasty for femoral neck and what kind of associated factors could inßuence this survival rate. Methods: From 1980 until 2000, a total of 271 bipolar hemiarthroplasties were inserted for displaced femoral neck fractures in 269 patients, 207 were women and 64 were men, 62,4% cemented and 37,6% uncemented. The median age was 67,5 years (range: 28–93). The median follow-up was 74.6 months (range: 1–232). They were excluded pathologic fractures, osteoarthritis and dysplasic hips. We have studied the relationship between survivorship and presumed prognostic factors like age, sex and cementation. We used Kaplan-Meier method for calculating survival rates and Log-Rank test to assess prognostic factors. Results: Twenty-three (8,5%) hips required revision surgery, 3 were septic (1,1%) and 20 were aseptic (7,4%). In aseptic group we could þnd stem loosening (4,1%), polyethylene failure (1,4%), acetabular erosion (1,1%) and dislocation (0,7%). The 5- and 10-year hemiarthroplasty survival (HS) rates were 96% and 93% respectively. We found that only age< 60 years was signiþcant prognostic factor for HS (p< 0.05). Sex and cementation has not inßuenced signiþcantly on survival rate (p> 0,05). Conclusions: According to the outcomes in our group, we feel bipolar arthroplasty should be the technique of choice in patients over 60 years with sufþcient walking ability, when they have a displaced femoral neck fracture.