The treatment of proximal humeral fracture in adults.

BACKGROUND: The incidence of proximal humeral fractures lies between 105 and 342 per 100 000 persons per year. Around the world, this type of fracture remains a major challenge for treating surgeons. While non-displaced fractures can be managed conservatively, displaced ones are often treated surgically. METHODS: Selective literature review. RESULTS: There are still no evidence-based schemes or guidelines for the treatment of proximal humeral fractures, and very few prospective randomized trials are available. The few that have been published recently show a trend in favor of conservative treatment, but they were carried out on small groups of patients and their findings are not directly generalizable. For younger patients, the goal of treatment is generally anatomical repositioning and osteosynthetic stabilization; for older patients, primary treatment with a prosthesis is a further option. Depending on the mode of treatment, complications can arise such as shoulder stiffness, necrosis of the humeral head, pain, infection, loss of reposition, and "cutting out." CONCLUSION: Current evidence supports the individualized treatment of proximal humeral fractures. Treatment decisions must always be made jointly with the patient in consideration of his or her individual needs and characteristics. Particularly for elderly patients, the possibility of conservative treatment should be carefully considered. If conservative treatment is not possible, then the type of operation performed should also be a function of the surgeon's individual skills and experience with particular types of implant.

Locking-plate osteosynthesis versus intramedullary nailing for fixation of olecranon fractures: a biomechanical study.

PURPOSE: Intramedullary nailing and locked plating for fixation of olecranon fractures has recently gained popularity. However, these two new technologies have not been compared for their biomechanical efficacy. The aim of this study was to evaluate the biomechanical stability of two newly designed fracture fixation devices for treating olecranon fractures during dynamic continuous loading: the ION intramedullary locking nail and the LCP precontoured locking compression plate. METHODS: Simulated oblique olecranon fractures were created in eight pairs of fresh-frozen cadaver ulnae and stabilised using either the LCP or ION. Specimens were then subjected to continuous dynamic loading (from 25 to 200 N), with a continuous angle alteration between 0° and 90° of flexion, to perform a matched-pairs comparison. Significant differences in the distance between markers surrounding the fracture gap was determined using the Wilcoxon test after four and 300 loading cycles. RESULTS: The ION resulted in significantly less displacement in the fracture gap at 0° extension (P = 0.036), 45° flexion (P = 0.035) and 90° flexion (P = 0.017) after 300 cycles of continuous loading. The measured displacements were small and were probably not of clinical significance. No mechanical failure or hardware migration was seen with either fixation technique. CONCLUSION: This study shows significantly less micromotion for the ION than for the LCP in treating oblique olecranon fractures after 300 cycles of dynamic loading. Both implant types could be appropriate surgical techniques for fixation of selected olecranon fractures and osteotomies.