Introduction: The clinical results of 164 cementless Low Contact Stress Rotating Platform Knee Replacements are reported at a maximum follow-up of 15 years Revision for any reason but infection was considered as a failure.

Methods: 164 cementless TKA were assessed.

Findings: Radiological evaluation showed stable fixation of all components, but in 7 knees (4.26%) significant osteolysis had occurred. Four knees had osteolysis beneath a loose tibial component after 10.2 years from the index surgery and revised to a cemented long-stem tibial component. Three knees were treated with bearing exchange and with bone graft in the tibial lytic region at an average 11.4 years from the index surgery. One cementless rotating-bearing patella (0.60%) required revision.

Conclusion: The survivorship of cementless knee replacements using rotating platform with end points of revision for any mechanical reason but infection was 96.34% at 15 years. However, complications due to an increased incidence of osteolysis after 10 years follow-up have been also identified.

Seven patients with stress fractures of the femoral neck were treated at the Military Hospital of Thessaloniki, Greece between 1972 and 1976. Their average age was 22 years. Stress fractures of the femoral neck are not as common as stress fractures of the metatarsals or tibia and other bones. Intense muscular activity was the main cause of these stress fractures which were only classed as such in the absence of any injury. Pain and stiffness around the hip were reported by all seven patients before admission. Results of laboratory investigations of the patients' alkaline phosphatase and serum calcium levels were normal. One patient received surgical treatment and the other patients were treated conservatively. Healing was uneventful in all.