Osteosynthesis Technique for Periprosthetic Femoral Fractures: A Case of Interprosthetic Fracture Between a Total Knee Arthroplasty and a Dynamic Hip Screw.

Periprosthetic fractures remain a challenging component of every trauma practice. Total joints have become common in very elderly patients, creating a variety of implanted stress risers that make subsequent fractures unique challenges to address. This creates the need to build a construct that will allow for early weight bearing while trying to reduce the potential for further fractures in the same bone.

Patient-Reported Outcome Measures for Patellofemoral Instability: a Critical Review.

Purpose Of Review: The purpose of this paper was to review the current psychometric properties of patient-reported outcome measures that are commonly used for patients with patellofemoral instability. This review provides evidence to guide the selection of subjective outcome measures for assessing outcomes in clinical care and research studies.

Recent Findings: At the present time, there are two patient-reported outcome measures that have been designed for, and tested on, large cohorts of patellofemoral instability patients, the Banff Patella Instability Instrument (BPII) and the Norwich Patellar Instability Score (NPI).

Magnesium Sulfate Salt Solutions and Ices Fail to Protect Serratia liquefaciens from the Biocidal Effects of UV Irradiation under Martian Conditions.

The growth of Serratia liquefaciens has been demonstrated under martian conditions of 0.7 kPa (7 mbar), 0°C, and CO-enriched anoxic atmospheres (Schuerger et al., 2013, Astrobiology 13:115-131), but studies into the survivability of cells under hypersaline conditions that are likely to be encountered on Mars are lacking.

Prevalence of helmet use by users of bicycles, push scooters, inline skates and skateboards in Toronto and the surrounding area in the absence of comprehensive legislation: an observational study.

Background: Legislation in the province of Ontario, Canada, mandates users under the age of 18 to wear a helmet when they ride a bicycle, and legislation has been shown to significantly increase rates of bicycle helmet use. Legislation does not exist in Ontario for older bicyclists or for users of other non-motorised modes of transportation, and there are no current data available regarding rates of helmet use in these categories. This study was designed to determine the prevalence of helmet use among users of bicycles, skateboards, push scooters and inline skates in Toronto, Ontario, and the surrounding area.