The 130,000-pound Trident II D5 missile can travel 20,000-feet per second, according to Navy figures. Within the last several years, the Navy has acquired more than 100 Trident II D5 missiles in order to strengthen the inventory for testing and further technological development. There has been an ongoing effort to engineer a new release assembly that will work with either the Mk-4 or Mk-5 reentry body. The missile also has a larger structure called a release assembly which houses and releases the reentry bodies. Navy officials say the Mk-5 reentry body has more yield than an Mk-4 reentry body, adding that more detail on the differences was not publicly available. The Navy has also, in recent years, been working with the Air Force on refurbishing the Mk-5 reentry body. 9 It has not been studied, though, whether creep (suture elongation) exists within the suture button material in these syndesmosis fixation devices.Navy and industry engineers have also been modernizing the guidance system by replacing two key components due to obsolescence – the inertial measurement unit and the electronics assembly, developers said. Creep is a well-demonstrated phenomenon in suture material causing failure. In addition, suture creep could occur in the mechanism. Failure in the fixation device could occur at multiple points in the system, including suture breakage, failure of the medial toggle device to flip against the tibia, resorption of the lateral button at the fibula interface, or the knotless suture mechanism slipping through the button device. 2 These devices are connected with braided polyethylene suture that allows dynamic fixation across the ankle syndesmosis. A medial stainless steel or titanium ToggleLoc™ device allows solid purchase against cortical bone, while a lateral top hat button accommodates fixation against a plate or directly on the fibula ( Figure 3). 2 This creates a unique patient specific product that can vary in length and tension, with resistance to slippage without tying knots. The ZipTight system incorporates ZipLoop technology, in which, a single strand of braided polyethylene suture is woven through itself twice in opposite directions ( Figures 1, 2). One such low profile, knotless suture button device for ankle syndesmosis repair is the ZipTight™ Fixation System (Biomet Sports Medicine, Warsaw, IN). All subjects Allied Health Cardiology & Cardiovascular Medicine Dentistry Emergency Medicine & Critical Care Endocrinology & Metabolism Environmental Science General Medicine Geriatrics Infectious Diseases Medico-legal Neurology Nursing Nutrition Obstetrics & Gynecology Oncology Orthopaedics & Sports Medicine Otolaryngology Palliative Medicine & Chronic Care Pediatrics Pharmacology & Toxicology Psychiatry & Psychology Public Health Pulmonary & Respiratory Medicine Radiology Research Methods & Evaluation Rheumatology Surgery Tropical Medicine Veterinary Medicine Cell Biology Clinical Biochemistry Environmental Science Life Sciences Neuroscience Pharmacology & Toxicology Biomedical Engineering Engineering & Computing Environmental Engineering Materials Science Anthropology & Archaeology Communication & Media Studies Criminology & Criminal Justice Cultural Studies Economics & Development Education Environmental Studies Ethnic Studies Family Studies Gender Studies Geography Gerontology & Aging Group Studies History Information Science Interpersonal Violence Language & Linguistics Law Management & Organization Studies Marketing & Hospitality Music Peace Studies & Conflict Resolution Philosophy Politics & International Relations Psychoanalysis Psychology & Counseling Public Administration Regional Studies Religion Research Methods & Evaluation Science & Society Studies Social Work & Social Policy Sociology Special Education Urban Studies & Planning BROWSE JOURNALS
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