Use a simple lower limb outrigger frame in intramedullary nailing fixation of a floating knee.

Closed intramedullary nailing is a classical therapeutic approach for floating knee injuries. An appropriate positioning is critical for a successful surgery. However, there is a lack of an ideal auxiliary device to facilitate the implantation of intramedullary nail.

Hollow-bone-graft dynamic hip screw can fix and promote bone union after femoral neck fracture: an experimental research.

Background: Delayed bone union, nonunion or osteonecrosis often occur after femoral neck fractures in young adults. Secondary bone healing requires strong internal fixation, intramedullary pressure reduction and early functional exercise.

Objective: To compare bone healing of femoral neck fractures treated with hollow-bone-graft dynamic hip screws (Hb-DHS) and standard dynamic hip screws (DHS) in an animal model.

Rap system of stress stimulation can promote bone union after lower tibial bone fracture: a clinical research.

Background: Lower tibial bone fracture may easily cause bone delayed union or nonunion because of lacking of dynamic mechanical load.

Objective: Research Group would design a new instrument as Rap System of Stress Stimulation (RSSS) to provide dynamic mechanical load which would promote lower tibial bone union postoperatively.

Methods: This clinical research was conducted from January 2008 to December 2010, 92 patients(male 61/female 31, age 16-70 years, mean 36.