BACKGROUND Premature failure of either the nail and/or locking screws with unstable fracture patterns may lead to angulation, shortening, malunion, and IM nail migration. Up to thirty percent of all unreamed nail locking screws can break after initial weight bearing is allowed at 8-10 weeks if union has not occurred. The primary problem this presents is hardware removal during revision surgery....

Intramedullary nailing is a technically demanding procedure which involves an excessive amount of x-ray acquisitions; one study lists as many as 48 to successfully complete the procedure. In this work, a novel low cost radiation-free drilling guide is designed to assist surgeons in completing the distal locking procedure without any x-ray acquisitions. Using an augmented reality fluoroscope tha...

BACKGROUND AND PURPOSE Growth modulation with a medial malleolar screw is used to correct ankle valgus deformity in children with a wide spectrum of underlying etiologies. It is unclear whether the etiology of the deformity affects the angular correction rate with this procedure. PATIENTS AND METHODS 79 children (20 girls) with ankle valgus deformity had growth modulation by a medial malleola...

Background: Hip fractures are a leading cause of death and disability among elderly. Approximately half of these injuries are intertrochanteric fractures and the incidence is continuously increasing. It is estimated that the incidence of intertrochanteric fractures will be doubled by the year 2040. Different types of implants were tried at different times for internal fixation of these fracture...

Figure 2. Specimen mounted on the MTS. Intramedullary nails with distal interlocking screws locked to the nail may have higher fatigue strength in comminuted supracondylar femur fractures McDonald, E;, Fischer, J; Bartlett, T; Buckley, J.M; Pekmezci, M, +Kandemir, U +Biomechanical Testing Facility, UCSF/SFGH Orthopaedic Trauma, University of California at San Francisco, San Francisco, CA, USA D...

Minimally invasive osteosynthesis of proximal tibial fractures has grown in popularity in recent years. This article describes a patient with a Schatzker type VI proximal tibial fracture (AO/OTA type 41.C3) and previous compartment syndrome treated with definitive fixation 8 weeks after initial injury with a precontoured proximal tibial plate and a distal targeting device. Brisk bleeding occurr...

a 16-year-old class ii female patient was treated without tooth extraction. the upper first molars were distalized by the pendulum appliance. after six months, the molars tipped significantly to the distal. to correct this side effect, we decided to upright the molars using skeletal anchorage. on each side, a mini-screw was inserted between first and second premolars in the buccal cortical plat...

BACKGROUND Volar locking plate fixation has become the gold standard in the treatment of unstable distal radius fractures. Juxta-articular screws should be placed as close as possible to the subchondral zone, in an optimized length to buttress the articular surface and address the contralateral cortical bone. On the other hand, intra-articular screw misplacements will promote osteoarthritis, wh...

Various fixation techniques have been described for ruptured distal biceps tendons. The authors hypothesized that no significant differences would be found between the mean failure strength, maximum strength, and stiffness of the interference screw and hybrid technique. Fourteen fresh-frozen human cadaveric elbows were prepared. Specimens were randomized to either interference screw or hybrid c...