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.

The use of a Shoulder Hemiarthroplasty for the treatment of Proximal Humerus Fractures (Neer 3 and 4 Parts) is the subject of this study.

71 patients with 71 Proximal Humerus Fractures were treated with this method. Four were exluded from the study (they did not match the follow-up criteria). From the remaining 67, 60 were women and 7 men, aging from 38 to 96 years (average 67.13 year, S.D. 14,769s). Of these patients 22 were Neer 3 (1 with a dislocation) and 45 were Neer 4 (17 with a dislocation). There were 4 cases of a failed ORIF and in 8 cases the operation followed failed conservative treatment (2 non-unions and 6 AVN). Time between fracture and surgery ranged from 1 to 5 days in 54 cases, while in the rest it exceeded 8 weeks. The fracture classification was performed with the use of 3 plain X-rays (AP, Lateral and Axillary views) and the results were evaluated using the Constant Score. The mean follow-up was 55.75 months (range 36 to 105). The average Constant Score was 67.4 (S.D. 14.3). There were no significant statistical differences regarding sex and age in respect to the Constant Score (t 65 =.243, p =.81), range of motion (t 65 =.048, p =.96), strength (t 65 =.741, p =.46), activities of daily living (t 65 =.030, p =.97) and pain relief (χ2 [1] =.001, p =.98). On the other hand the group of patients with the higher pain relief scores presented higher Constant Score values and better shoulder joint function in respect to the group which presented lower pain relief scores.

In conclusion the treatment of Proximal Humerus Fractures (Neer 3 and 4 Parts) with the use of a Shoulder Hemiarthroplasty is a good treatment method offering substantial pain relief, functional improvement of the joint leading to a faster rehabilitation in the majority of patients, regardless age and sex.