Introduction: ACL injury is very common among sport activities. The incidence is very high and causes an important disorder in the articular function. Some articles have been published in the recent years about the risks to suffer this injury and its consequences in the biomechanics and proprioception of the limb. Although most of them were performed in animals and cadaver specimens and a few of them were realized in patients for a dynamic evaluation.

Purpose: The objective was to analyze in a longitudinal and prospective manner the changes in proprioception (muscular latency in the muscles span the knee in front of a stimulus load) occurred in the joint in 25 patients undergone an ACL injury before and after ACL reconstruction using the contra lateral knee as control.

Material and Methods: The study was performed in an experimental task pre and 4 and 6 months post surgery. Clinical Tegner, Lysholm, IKDC and SF12 evaluation, motion analysis system (EliteR) and surface electromyography was performed in a synchronized manner during a single leg jump before and after a fatigue exercise of a 10 seconds repetitive single leg jump. The muscles studied were anterior rectus, lateral and medial vastus, semitendinous and femoral biceps of both knees. Statistical analysis was performed and a P value < 0.05 was considered significant.

Results: Statistical significant larger latency times in each muscle but lateral vastus was observed in the affected knee in the preoperative period with improvement in the first period of 4 months postoperatively reaching measures of the normal contralateral knee without further improvement at the 6 month period. Vastus medialis was the muscle more affected before surgery and semitendinous, although improved, never reached a normal reactivity. Extensor muscles of the normal knee presented in all the periods of the study similar results but flexor muscles showed significant better propioceptive function in the 4th and 6th month post surgery. Improvement in latency time of muscle reactivity correlated with better scores in the Lysholm, IKDC and SF12 scores, although the SF12 mental status didn’t change.

Conclusion: Operated knees improve their neuromuscular activity relatively fast during the first 4th months. Therefore, specifically talking about neuromuscular function normal physical activity may be can be allowed at the 4th month and that means two months before usually normal activity level is permitted. Preoperative rehabilitation would have to insist to get better medialis vastus function. The mental status didn’t correlate with the neuromuscular status that means that psychologic aspects must be treated simultaneously with the physical training. Synergy among neurological pathways would exist, appreciating improved response in flexor muscles in the contralateral knee during the rehabilitation period

Fractures of the distal radius are the most common bony injuries in the upper extremity, and many treatment Methods: have been described in the literature. External fixation remains a highly versatile method to treat many fracture types involving the distal radius. The primary indications for external fixation include reduction of unstable extra-articular fractures and most intra-articular fractures. The use of adjuvant pinning or mini open procedures can be used when external fixation inadequately reduces the joint line alone, especially with central depressions and highly comminuted injuries. The ease of use of the implants and successful track record make it an extremely versatile tool for treating complex fractures of the distal radius.

Purpose: To compare 2 Methods: of surgical treatment for displaced intra-articular fractures of the distal radius: open reduction and internal fixation with dorsal plating (Pi Plate; Synthes, Paoli, PA) versus external fixation with o without K-wires.

Methods: We compare a retrospective study about AO type C intra-articular distal radius fractures. The fist group (40 patients) is treated with open reduction and internal fixation with DVR plate ande the second group (65 pacients) is treated with external fixation and K-wires and mini-open reduction.

Objective, subjective, and radiographic outcomes were assessed at 2 weeks, 4 to 6 weeks, 10 to 12 weeks, 6 months, and 1- and 2-year intervals. The minimum follow-up period was 6 months; the average follow-up period was 18 months. The principal outcome analyzed was Jakim store that included pain, grip strength, range of motion, complications, and radiographic parameters. The groups were equal with respect to age, gender and fracture subtype.

Results: No significant difference was found in the Jakim store outcome. The volar plate group, howevwe, showed a similar complication rate when compared with the external fixator group. The plate group also had similar levels of pain at 1 year when compared with the external fixator group. The external fixator group showed an average grip strength of 92% compared with the normal side and 86% in the volar plate group.

Conclusions: At midterm analysis the volar plate group showed a significantly higher complication rate compared with the external fixator group; therefore enrollment in the study was terminated. The volar plate group also showed statistically significant higher levels of pain, and weaker grip strength. Based on these results we can recommend the use of volar plates in treating complex intraarticular fractures of the distal radius.